Publications

108. “Solution Structures of Lithium Enolates, Phenolates, Carboxylates, and Alkoxides in the Presence of N,N,N’,N’-Tetramethylethylenediamine: A Prevalence of Cyclic Dimers”.

Gruver, J. M.; Liou, L. R.; McNeil, A. J.; Ramirez, A.; Collum, D. B. J. Org. Chem. 2008, 73, 7743.

107. “Synthesis of a 7-Azaindole by Chichibabin Cyclization: Reversible Base-Mediated Dimerization of 3-Picolines”.

Ma, Y.; Breslin, S.; Keresztes, I.; Lobkovsky, E.; Collum, D. B. J. Org. Chem. 2008, 73, 9610.

106. “Lithium Hexamethyldisilazide-Mediated Enolizations: Influence of Triethylamine on E/Z Selectivities and Enolate Reactivities ”.

Godenschwager, P. F.; Collum, D. B. J. Am. Chem. Soc. 2008, 130, 8726.

105. “Lithium Enolates of Simple Ketones: Structure Determination Using the Method of Continuous Variation"”.

Liou, R. L.; McNeil, A. J.; Ramirez A.; Toombes, G. E. S.; Gruver, J. M.; Collum, D. B. J. Am. Chem. Soc. 2008, 130, 4859.

104. “Structural and Rate Studies of the Formation of Substituted Benzynes”.

Riggs, J. C.; Ramirez, A.; Cremeens, M. E.; Bashore, C. G.; Candler, J.; Wirtz, M. C.; Coe, J. W.; Collum, D. B. J. Am. Chem. Soc. 2008, 130, 3406.

103. “Lithium Diisopropylamide-Mediated Reactions of Imines, Unsaturated Esters, Epoxides, and Aryl Carbamates: Influence of Hexamethylphosphoramide and Ethereal Cosolvents on Reaction Mechanisms”.

Ma, Y.; Collum, D. B. J. Am. Chem. Soc. 2007, 129, 14818.

102. “Lithium Hexamethyldisilazide-Mediated Enolizations: Influence of Chelating Ligands and Hydrocarbon Cosolvents on the Rates and Mechanisms”.

Godenschwager, P. F.; Collum, D. B. J. Am. Chem. Soc. 2007, 129, 12023.

101. “n-Butyllithium/N,N,N',N'-Tetramethylethylenediamine-Mediated Ortholithiations of Aryl Oxazolines: Substrate-Dependent Mechanisms”.

Chadwick, S. T.; Ramirez, A.; Gupta, L.; Collum, D. B. J. Am. Chem. Soc. 2007, 129, 2259.

100. “Lithium Diisopropylamide: solution kinetics and implications for organic synthesis”.

McNeil A. J.; Ramirez A.; Collum, D. B. Angew. Chem., Int. Ed. 2007, 46, 3002.

99. "Lithium Diisoproplyamide Solvated by Hexamethylphosphoramide: Substrate-Dependent Mechanisms for Dehydrobrominations".

Ma, Y.; Ramirez, A.; Singh, K. J.; Keresztes, I.; Collum, D. B. J. Am. Chem. Soc. 2006, 128, 15399.

98. "Lithium Diisopropylamide-Mediated Ortholithiation and Anionic Fries Rearrangement of Aryl Carbamates: Role of Aggregates and Mixed Aggregates".

Singh, K. J.; Collum, D. B. J. Am. Chem. Soc. 2006, 128, 13753.

97. "Mechanism of Acylation of Lithium Phenylacetylide with a Weinreb Amide".

Qu, B.; Collum, D. B. J. Org. Chem. 2006, 71, 7117.

96. "Lithium Diisopropylamide-Mediated Enolization: Catalysis by Hemilabile Ligands".

Ramirez, A.; Sun, X.; Collum, D. B. J. Am. Chem. Soc. 2006, 128, 10326.

95. "Structure of n-Butyllithium in Mixtures of Ethers and Diamines: Influence of Mixed Solvation on 1,2-Additions to Imines".

Qu, B.; Collum, D. B. J. Am. Chem. Soc. 2006, 128, 9355.

94. "Lithiated Imines: Solvent-Dependent Aggregate Structures and Mechanisms of Alkylation".

Zuend, S. J.; Ramirez, A.; Lobkovsky, E.; Collum, D. B. J. Am. Chem. Soc. 2006, 128, 5939.

93. "Addition of n-Butyllithium to an Aldimine: Role of Chelation, Aggregation, and Cooperative Solvation".

Qu, B.; Collum, D. B. J. Am. Chem. Soc. 2005, 127, 10820.

92. "Reversible Enolization of β-Amino Carboxamides by Lithium Hexamethyldisilazide".

McNeil, A. J.; Collum, D. B. J. Am. Chem. Soc. 2005, 127, 5655.

91. "BF3-Mediated Additions of Organolithiums to Ketimines: X-ray Crystal Structures of BF3-Ketimine Complexes".

Ma, Y.; Lobkovsky, E.; Collum, D. B. J. Org. Chem. 2005, 70, 2335.

90. "Formation of Benzynes from 2,6-Dihaloaryllithiums: Mechanistic Basis of the Regioselectivity".

Ramirez, A.; Candler, J.; Bashore, C. G.; Wirtz, M. C.; Coe, J. W.; Collum, D. B. J. Am. Chem. Soc. 2004, 126, 14700.

89. "Diastereoselective Alkylation of β-Amino Esters: Structural and Rate Studies Reveal Alkylations of Hexameric Lithium Enolates".

McNeil, A. J.; Toombes, G. E. S.; Chandramouli, S. V.; Vanasse, B. J.; Ayers, T. A.; O’Brien, M. K.; Lobkovsky, E.; Gruner, S. M.; Marohn, J. A.; Collum, D. B. J. Am. Chem. Soc. 2004, 126, 16559.

88. “Characterization of ß-Amino Ester Enolates as Hexamers via 6Li NMR Spectroscopy”.

McNeil, A. J.; Toombes, G. E. S.; Chandramouli, S. V.; Vanasse, B. J.; Ayers, T. A.; O’Brien, M. K.; Lobkovsky, E.; Gruner, S. M.; Marohn, J. A.; Collum, D. B. J. Am. Chem. Soc. 2004, 126, 5938.

87. “Lithium Hexamethyldisilazide-Mediated Ketone Enolization: The Influence of Hindered Dialkyl Ethers and Isostructural Dialkylamines on Reaction Rates and Mechanisms”.

Zhao, P.; Lucht, B. L.; Kenkre, S. L.; Collum, D. B. J. Org. Chem. 2004, 69, 242.

86. “Reaction of Ketones with Lithium Hexamethyldisilazide: Competitive Enolizations and 1,2-Additions”.

Zhao, P.; Condo, A.; Keresztes, I.; Collum, D. B. J. Am. Chem. Soc. 2004, 126, 3113.

85. “Structural and Rate Studies of the 1,2-Additions of Lithium Phenylacetylide to Lithiated Quinazolinones: Influence of Mixed Aggregates on the Reaction Mechanism”.

Briggs, T. F.; Winemiller, M. D.; Parsons, Jr., R. L.; Davulcu, A. H.; Harris, G. D.; Fortunak, J. M.; Confalone, P. M. Collum, D. B. J. Am. Chem. Soc. 2004, 126, 5427.

84. “Hemilabile Ligands in Organolithium Chemistry: Substituent Effects on Lithium Ion Chelation”.

Ramirez, A.; Lobkovsky, E.; Collum, D. B. J. Am. Chem. Soc. 2003, 125, 15376.

83. “Ketone Enolization by Lithium Hexamethyldisilazide: Structural and Rate Studies of the Accelerating Effects of Trialkylamines”.

Zhao, P.; Collum, D. B. J. Am. Chem. Soc. 2003, 125, 14411.

82. “Lithium 2,2,6,6-Tetramethylpiperidide-Mediated α- and β-Lithiations of Epoxides: Solvent-Dependent Mechanisms”.

Wiedemann, S. H.; Ramirez, A.; Collum, D. B. J. Am. Chem. Soc. 2003, 125, 15893.

81. “Lithium Diisopropylamide-Mediated Lithiations of Imines: Insights into Highly Structure-Dependent Rates and Selectivities”.

Liao, S.; and Collum, D. B. J. Am. Chem. Soc. 2003, 125, 15114.

80. “Lithium Hexamethyldisilazide/Triethylamine-Mediated Ketone Enolization: Remarkable Rate Accelerations Stemming from a Dimer-Based Mechanism”.

Zhao, P.; Collum, D. B. J. Am. Chem. Soc. 2003, 125, 4008.

79. “Consequences of Correlated Solvation on the Structures and Reactivities of RLi-Diamine Complexes: 1,2-Addition and α-Lithiation Reactions of Imines by TMEDA-Solvated n-Butyllithium and Phenyllithium”.

Rutherford J. L.; Hoffmann, D.; Collum, D. B. J. Am. Chem. Soc. 2002, 124, 264.

78. “Lithium Diisopropylamide: Oligomer Structures at Low Ligand Concentrations”.

Rutherford, J. L.; Collum, D. B. J. Am. Chem. Soc. 2001, 123, 199.

77. “NMR Spectroscopic Investigations of Mixed Aggregates Underlying Highly Enantioselective 1,2-Additions of Lithium Cyclopropylacetylide to Quinazolinones”.

Parsons, Jr., R. L.; Fortunak, J. M.; Dorow, R. L.; Harris, G. D.; Kauffman, G. S.; Nugent, W. A.; Winemiller, M. D.; Briggs, T. F.; Xiang, B.; Collum, D. B. J. Am. Chem. Soc. 2001, 123, 9135.

76. “Optimizing HMQC for ISn Spin Systems”.

Xiang, B.; Winemiller, M. D.; Briggs, T. F.; Fuller, D. J.; Collum, D. B. Magn. Reson. Chem. 2001, 39, 137.

75. “Solution Structures and Reactivities of the Mixed Aggregates Derived from n-Butyllithium and Vicinal Amino Alkoxides”.

Sun, X.; Winemiller, M. D.; Xiang, B.; Collum, D. B. J. Am. Chem. Soc. 2001, 123, 8039.

74. “Solution Structures of the Mixed Aggregates Derived from Lithium Acetylides and a Camphor-Derived Amino Alkoxide”.

Briggs, T. F.; Winemiller, M. D.; Xiang, B.; Collum, D. B. J. Org. Chem. 2001, 66, 6291.

73. “Are n-BuLi/TMEDA-Mediated Arene Ortholithiations Directed? Substituent-Dependent Rates, Substituent-Independent Mechanisms”.

Chadwick, S. T.; Rennels, R. A.; Rutherford, J. L.; Collum, D. B. J. Am. Chem. Soc. 2000, 122, 8640.

72. “BF3-Mediated Addition of Lithium Phenylacetylide to an Imine: Correlations of Structures and Reactivities. BF3·R3N Derivatives as Substitutes for BF3·Et2O”.

Aubrecht, K. B.; Winemiller, M. D.; Collum, D. B. J. Am. Chem. Soc. 2000, 122, 11084.

71. “Highly Enantioselective 1,2-Addition of Lithium Acetylide-Ephedrate Complexes: Spectroscopic Evidence for Reaction Proceeding via a 2:2 Tetramer, and X-ray Characterization of Related Complexes”.

Xu, F.; Reamer, R. A.; Tillyer, R.; Cummins, J. M.; Grabowski, E. J. J.; Reider, P. J.; Huffman, J. C. ; Collum, D. B. J. Am. Chem. Soc. 2000, 122, 11212.

70. “Lithium Diisopropylamide-Mediated Enolizations: Solvent-Dependent Mixed Aggregation Effects”.

Sun, X.; Collum, D. B. J. Am. Chem. Soc. 2000, 122, 2459.

69. “Lithium Diisopropylamide-Mediated Enolizations: Solvent-Independent Rates, Solvent-Dependent Mechanisms”.

Sun, X.; Collum, D. B. J. Am. Chem. Soc. 2000, 122, 2452.

68. “Hemilabile Ligands in Organolithium Chemistry: Rate Studies of the LDA-Mediated α- and β-Metalations of Epoxides”.

Ramirez, A.; Collum, D. B. J. Am. Chem. Soc. 1999, 121, 11114.

67. “Lithium Hexamethyldisilazide: A View of Lithium Ion Solvation Through a Glass-Bottom Boat”.

Lucht, B. L.; Collum, D. B. Acc. Chem. Res. 1999, 32, 1035.

66. “NMR Spectroscopic Studies of Lithium Diethylamide: Insights into Ring Laddering”.

Rutherford, J. L.; Collum, D. B. J. Am. Chem. Soc. 1999, 121, 10198.

65. “Solution Structures of Lithium Monoalkylamides (RNHLi)”.

Aubrecht, K. B.; Lucht, B. L.; Collum, D. B. Organometallics. 1999, 18, 2981.

64. “Binding of Diamines to n-Butyllithium Dimers: Relative Solvation Energies and Evidence of Correlated Solvation”.

Hoffmann, D.; Collum, D. B. J. Am. Chem. Soc. 1998, 120, 5810.

63. “Structure and Reactivity of Lithium Diisopropylamide Solvated by Polyamines: Evidence of Monomer- and Dimer-Based Dehydrohalogenations”.

Remenar, Julius F.; Collum, D. B. J. Am. Chem. Soc. 1998, 120, 4081.

62. “Lithium Ephedrate-Mediated Addition of a Lithium Acetylide to a Ketone: Solution Structures and Relative Reactivities of Mixed Aggregates Underlying the High Enantioselectivities”.

Thompson, A.; Corley, E. G.; Huntington, M. F.; Grabowski, E. J. J.; Remenar, J. F.; Collum, D. B. J. Am. Chem. Soc. 1998, 120, 2028.

61. “Ortholithiation of Anisole by BuLi-TMEDA: Reaction via Disolvated Dimers”.

Rennels, R. A.; Maliakal, A. J.; Collum, D. B. J. Am. Chem. Soc. 1998, 120, 421.

60. “Lithium 2,2,6,6-tetramethylpiperidide and lithium 2,2,4,6,6-Pentamethylpiperidide: Influence of TMEDA and Related Chelating Ligands on the Solution Structures. Characterization of Higher Cyclic Oligomers, Cyclic Dimers, Open Dimers, and Monomers”.

Remenar, J. F.; Lucht, B. L.; Kruglyak, D.; Romesberg, F. E.; Gilchirst, J. H.; Collum, D. B. J. Org. Chem. 1997, 62, 5748.

59. “Chelation-Based Stabilization of the Transition Structure in a Lithium Diisopropylamide Mediated Dehydrobromination: Avoiding the "Universal Ground State" Assumption”.

Remenar, J. F.; Collum, D. B. J. Am. Chem. Soc. 1997, 119, 5573.

58. “Lithium Diisopropylamide Solvated by Monodentate and Bidentate Ligands: Solution Structures and Ligand Binding Constants”.

Remenar, J. F.; Lucht, B. L.; Collum, D. B. J. Am. Chem. Soc. 1997, 119, 5567.

57. “Mechanism of Lithium Diisopropylamide-Mediated Ester Deprotonation: The Role of Disolvated Monomers”.

Sun, X.; Kenkre, S. L.; Remenar, J. F.; Gilchrist, J. H.; Collum, David B. J. Am. Chem. Soc. 1997, 119, 4765.

56. “Solution Structure of Lithium Dicyclohexylamide (Cy2NLi) and Related Mixed Aggregates: Comparison with Lithium Diisopropylamide”.

Aubrecht, K. B.; Collum, D. B. J. Org. Chem. 1996, 61, 8674.

55. “Polydentate Amine and Ether Solvates of Lithium Hexamethyldisilazide (LiHMDS): Relationship of Ligand Structure, Relative Solvation Energy, and Aggregation State”.

Lucht, B. L.; Bernstein, M. P.; Remenar, J. F.; Collum, D. B. J. Am. Chem. Soc. 1996, 118, 10707.

54. “Solvation of Lithium Hexamethyldisilazide by N,N-Dimethylethylenediamine: Effects of Chelation on Competitive Solvation and Mixed Aggregation”.

Lucht, B. L.; Collum, D. B. J. Am. Chem. Soc. 1996, 118, 3529.

53. “Lithium Ion Solvation: Amine and Unsaturated Hydrocarbon Solvates of Lithium Hexamethyldisilazide (LiHMDS)”.

Lucht, B. L.; Collum, D. B. J. Am. Chem. Soc. 1996, 118, 2217.

52. “Ethereal Solvation of Lithium Hexamethyldisilazide: Unexpected Relationships of Solvation Number, Solvation Energy, and Aggregation State”.

Lucht, B. L.; Collum, D. B. J. Am. Chem. Soc. 1995, 117, 9863.

51. “Palladium-Catalyzed Stille Couplings of Aryl-, Vinyl-, and Alkyltrichlorostannanes in Aqueous Solution”.

Rai, R.; Aubrecht, K. B.; Collum, D. B. Tetrahedron Lett. 1995, 36, 3111.

50. “Mechanism of Lithium Dialkylamide-Mediated Ketone and Imine Deprotonations: An MNDO Study of Monomer and Open Dimer Pathways”.

Romesberg, F. E.; Collum, D. B. J. Am. Chem. Soc. 1995, 117, 2166.

49. “Reductions and Radical Cyclizations of Aryl and Alkyl Bromides Mediated by NaBH4 in Aqueous Base”.

Rai, R.; Collum, D. B. Tetrahedron Lett. 1994, 35, 6221.

48. “6Li/15N NMR-Based Solution Structural Determination of Et2O- and TMEDA-Solvated Lithiophenylacetonitrile and a LiHMDS Mixed Aggregate”.

Carlier, P. R.; Lucht, B. L.; Collum, D. B. J. Am. Chem. Soc. 1994, 116, 11602.

47. “Lithium Dialkylamide Mixed Aggregation: An NMR Spectroscopic Study of the Influence of Hexamethylphosphoramide (HMPA)”.

Romesberg, F. E.; Collum, D. B. J. Am. Chem. Soc. 1994, 116, 9198.

46. “Lithium Dialkylamide Mixed Aggregation: MNDO Computational Study of Salt and Solvent Dependencies”.

Romesberg, F. E.; Collum, D. B. J. Am. Chem. Soc. 1994, 116, 9187.

45. “Structure of Lithium 2,2,6,6-Tetramethylpiperidide (LiTMP) and Lithium 2,2,4,4,6,6-Pentamethylpiperidide (LiPMP) in Hydrocarbon Solution: Assignment of Cyclic Trimer and Tetramer Conformational Isomers”.

Lucht, B. L.; Collum, D. B. J. Am. Chem. Soc. 1994, 116, 7949.

44. “Structure of Lithium Hexamethyldisilazide (LiHMDS): Spectroscopic Study of Ethereal Solvation in the Slow-Exchange Limit”.

Lucht, B. L.; Collum, D. B. J. Am. Chem. Soc. 1994, 116, 6009.

43. “Lithium Bis(2-adamantyl)amide: Structure and Reactivity of an Extremely Hindered Lithium Dialkylamide”.

Sakuma, K.; Gilchrist, J. H.; Romesberg, F. E.; Cajthaml, C. E.; Collum, D. B. Tetrahedron Lett. 1993, 34, 5213.

42. “Solvent- and Substrate-Dependent Rates of Imine Metalations by Lithium Diisopropylamide: Understanding the Mechanisms Underlying “krel”.

Bernstein, M. P.; Collum, D. B. J. Am. Chem. Soc. 1993, 115, 8008.

41. “Structure of Lithium Hexamethyldisilazide (LiHMDS) in the Presence of Hexamethylphosphoramide (HMPA). Spectroscopic and Computational Studies of Monomers, Dimers, and Triple Ions”.

Romesberg, F. E.; Bernstein, M. P.; Gilchrist, J. H.; Harrison, A. T.; Fuller, D. J.; Collum, D. B. J. Am. Chem. Soc. 1993, 115, 3475.

40. “Metalation of Imines by Lithium Diisopropylamide Solvated by N,N,N’,N’-Tetramethylethylenediamine: Evidence for Solvent-Free Open Dimer Reactive Intermediates”.

Bernstein, M. P.; Collum, D. B. J. Am. Chem. Soc. 1993, 115, 789.

39. “Solution Structures of Lithium Dialkylamides and Related N-Lithiated Species: Results from 6Li-15N Double Labeling Experiments”.

Collum, D. B. Acc. Chem. Res. 1993, 26, 227.

38. “ 6Li-15N Heteronuclear Multiple Quantum Correlation (HMQC) Spectroscopy: Application to the Structure Determination of Lithium 2,2,6,6-Tetramethylpiperidide Mixed Aggregates”.

Gilchrist, J. H.; Harrison, A. T.; Fuller, D. J.; Collum, D. B. Magn. Reson. Chem. 1992, 30, 855.

37. “Structure and Reactivity of Lithium Diisopropylamide in the Presence of N,N,N’,N’-Tetramethylethylenediamine”.

Bernstein, M. P.; Romesberg, F. E.; Fuller, D. J.; Harrison, A. T.; Liu, Q. Y.; Williard, P. G.; Collum, D. B. J. Am. Chem. Soc. 1992, 114, 5100.

36. “Determination of Structures of Solvated Lithium Dialkylamides by Semiempirical (MNDO) Methods. Comparison of Theory and Experiment”.

Romesberg, F. E.; Collum, D. B. J. Am. Chem. Soc. 1992, 114, 2112.

35. “Distinction of Symmetric Lithium Dialkylamide Dimers from Higher Oligomers by Inverse-Detected 15N Homonuclear Zero-Quantum NMR Spectroscopy”.

Gilchrist, J.H.; Collum, D. B. J. Am. Chem. Soc. 1992, 114, 794.

34. “Is N,N,N’,N’-Tetramethylethylenediamine a Good Ligand for Lithium?”.

Collum, D. B. Acc. Chem. Res. 1992, 25, 448.

33. “Mixed Aggregation of Lithium Enolates and Lithium Halides with Lithium 2,2,6,6-Tetramethylpiperidide (LiTMP)”.

Hall, P. L.; Gilchrist, J. H.; Harrison, A. T.; Fuller, D. J.; Collum, D. B. J. Am. Chem. Soc. 1991, 113, 9575.

32. “Effects of Lithium Salts on the Stereoselectivity of Ketone Enolization by Lithium 2,2,6,6-Tetramethylpiperidide (LiTMP). A Convenient Method for Highly E-Selective Enolate Formation”.

Hall, P. L.; Gilchrist, J. H.; Collum, D. B. J. Am. Chem. Soc. 1991, 113, 9571.

31. “On the Structure of Lithium 2,2,6,6-Tetramethylpiperidide (LiTMP) and Lithium Diisopropylamide (LDA) in the Presence of Hexamethylphosphoramide (HMPA): Structure-Dependent Distribution of Cyclic and Open Dimers, Ion Triplets, and Monomers”.

Romesberg, F. E.; Gilchrist, J. H.; Harrison, A. T.; Fuller, D. J.; Collum, D. B. J. Am. Chem. Soc. 1991, 113, 5751.

30. “Lithium Diisopropylamide Mixed Aggregates: Structures and Consequences on the Stereochemistry of Ketone Enolate Formation”.

Galiano-Roth, A. S.; Kim, Y. J.; Gilchrist, J. H.; Harrison, A. T.; Fuller, D. J.; Collum, D. B. J. Am. Chem. Soc. 1991, 113, 5053.

29. “On the Structure and Reactivity of Lithium Diisopropylamide (LDA) in Hydrocarbon Solutions. Formation of Unsolvated Ketone, Ester, and Carboxamide Enolates”.

Kim, Y. J.; Bernstein, M. P.; Galiano-Roth, A. S.; Romesberg, F. E.; Williard, P. G.; Fuller, D. J.; Harrison, A. T.; Collum, D. B. J. Org. Chem. 1991, 56, 4435.

28. “6Li and 15N Nuclear Magnetic Resonance Spectroscopic Studies of Lithiated Cyclohexanone Phenylamine Revisited. Aggregation-State Determination by Single-Frequency 15N Decoupling”.

Gilchrist, J. H.; Harrison, A. T.; Fuller, D. J.; Collum, D. B. J. Am. Chem. Soc. 1990, 112, 4069.

27. “Structure and Reactivity of Lithium Diisopropylamide (LDA). The Consequences of Aggregation and Solvation During the Metalation of an N,N-dimethylhydrazone”.

Galiano-Roth, A. S.; Collum, D. B. J. Am. Chem. Soc. 1989, 111, 6772.

26. “Organometallic Chemistry of Sulfinic Acids. Highly Stereo- and Regioselective Intramolecular Hydroplatinations. X-ray Crystal Structure of (Ph3P)2Pt[trans-SO2CH(CH3)CH2CH(CH2CH3)]”.

Hallock, J. S.; Galiano-Roth, A. S.; Collum, D. B. Organometallics. 1988, 7, 2486.

25. “Structure and Reactivity of Lithium Amides. 6Li, 13C, and 15N NMR Spectroscopic Studies and Colligative Measurements of Lithium Diphenylamide and Lithium Diphenylamide-Lithium Bromide Complex Solvated by Tetrahydrofuran”.

DePue, J. S.; Collum, D. B. J. Am. Chem. Soc. 1988, 110, 5518.

24. “Structure and Reactivity of Lithium Diphenylamide. Role of Aggregates, Mixed Aggregates, Monomers, and Free Ions on the Rates and Selectivities of N-Alkylation and E2 Elimination”.

DePue, J. S.; Collum, D. B. J. Am. Chem. Soc. 1988, 110, 5524.

23. “Syntheses and Reactions of η5-(Dimethylboryl)cyclopentadienyl Cobalt and Rhodium Derivatives. Site-Specific Binding of Unsaturated Amines”.

Klang, J. A.; Collum, D. B. Organometallics. 1988, 7, 1532.

22. “6Li and 23Na NMR Spectroscopic Studies of Metalated Hydrazone Cryptates. Effects of Ion Triplet Formation on the Stereochemistry of Alkylation”.

Galiano-Roth, A. S.; Collum, D. B. J. Am. Chem. Soc. 1988, 110, 3546.

21. “ 6Li, 13C, and 15N NMR Spectroscopic Studies of Lithium Dialkylamides. Solution Structure of Lithium Isopropylcyclohexylamide (LICA) in Tetrahydrofuran”.

Galiano-Roth, A. S.; Michaelides, E. M.; Collum, D. B. J. Am. Chem. Soc. 1988, 110, 2658.

20. “ 15N, 13C, and 6Li NMR Spectroscopic Studies and Colligative Measurements of Lithiated Cyclohexanone Phenylimine Solvated by Tetrahydrofuran”.

Kallman, N.; Collum, D. B. J. Am. Chem. Soc. 1987, 109, 7466.

19. “Solid-State and Solution Studies of Lithiated 2-Carbomethoxycyclohexanone Dimethylhydrazone and Lithiated Cyclohexanone Phenylimine”.

Wanat, R. A.; Van Duyne, G.; Clardy, J.; DePue, R. T.; Collum, D. B. J. Am. Chem. Soc. 1986, 108, 3415.

18. “Metal- and Alkoxide-Mediated Phosphorus-Oxygen Bond Cleavage in (η5-Cyclopentadienyl) cobalt Phosphinite Ester Complexes”.

Depue, R. T.; Klang, J. A.; Collum, D. B. Organometallics. 1986, 5, 1015.

17. “Mechanistic Studies of Phosphorus-Oxygen Bond Cleavages in Group 7 Dinuclear Complexes of 2-Pyridyl Dimethylphosphinite”.

Klang, J. A.; Depue, R. T.; Collum, D. B. J. Am. Chem. Soc. 1986, 108, 2333.

16. “Synthesis of Alternating Hydroxy- and Methyl-Substituted Hydrocarbons by Oxymercuration of Cyclopropylcarbinols”.

Still, W. C.; Mohamadi, F.; Collum, D. B. J. Am. Chem. Soc. 1986, 108, 2094.

15. “Approaches to the Synthesis and Detection of a Transient Palladium(0) Alkylidene”.

Wanat, R. A.; Collum, D. B. Organometallics. 1986, 5, 120.

14. “Alkoxide-Triggered Ligand Aubstitution. Highly Stereoselective Formation of Unsaturated Phosphinite Ester-Molybdenum Tetracarbonyl Chelates and the X-ray Crystal Structure of (1-Phenylallyl Dimethylphosphinite)molybdenum Tetracarbonyl”.

DePue, R. T.; Collum, D. B.; Ziller, J. W.; Churchill, M. R. J. Am. Chem. Soc. 1985, 107, 2131.

13. “Improved Synthesis of 4-Vinyl-4'-methyl-2,2'-bipyridine”.

Abruna, H. D.; Breikss, A. I.; Collum, D. B. Inorganic Chemistry. 1985, 24, 987.

12. “On the Origin of the Stereoselectivity of Hydrazone Alkylations. Investigation of Aggregation Effects and Solution Kinetics”.

Wanat, R. A.; Collum, D. B. J. Am. Chem. Soc. 1985, 107, 2078.

11. “Substituent Effects on the Stereochemistry of Substituted Cyclohexanone Dimethylhydrazone Alkylations. An X-ray Crystal Structure of Lithiated Cyclohexanone.”

Kahne, D.; Gut, S. A.; DePue, R. T.; Mohamadi, F.; Wanat, R. A.; Clardy, J.; Van Duyne, G.; Collum, D. B. J. Am. Chem. Soc. 1984, 106, 4865.

10. “Total Synthesis and Stereochemistry of (+)-Phyllanthocindiol.”

McGuirk, P. R.; Collum, D. B. J. Org. Chem. 1984, 49, 843.

9. “Conversion of Ketones to Trisubstituted Olefins under Neutral Conditions.”

Mohamadi, F.; Collum, D. B. Tetrahedron Lett. 1984, 25, 271.

8. “Mercury(II)-Mediated Opening of Cyclopropanes. Effects of Proximate Internal Nucleophiles on Stereo- and Regioselectivity.”

Mohamadi, F.; Hallock, J. S.; Collum, D. B. J. Am. Chem. Soc. 1983, 105, 6882.

7. “Total Synthesis of (+)-Phyllanthocin.”

McGuirk, P. R.; Collum, D. B. J. Am. Chem. Soc. 1982, 104, 4496.

6. “Kinetic Cyanations of Ketone Enolates.”

Kahne, D.; Collum, D. B. Tetrahedron Lett. 1981, 22, 5011.

5. “Synthesis of the Polyether Antibiotic Monensin. 3. Coupling of Precursors and Transformation to Monensin.”

McDonald, J. H., III; Still, W. C.; Collum, D. B. J. Am. Chem. Soc. 1980, 102, 2120.

4. “Synthesis of the Polyether Antibiotic Monensin. 2. Preparation of Intermediates.”

McDonald, J. H., III; Still, W. C. Collum, D. B. J. Am. Chem. Soc. 1980, 102, 2118.

3. “Synthesis of the Polyether Antibiotic Monensin. 1. Strategy and Degradations.”

McDonald, J. H., III; Still, W. C.; Collum, D. B. J. Am. Chem. Soc. 1980, 102, 2117.

2. “A Highly Stereoselective Synthesis of the C18 Cecropia Juvenile Hormone.”

Still, W. C.; McDonald, J. H., III; Mitra, A.; Collum, D. B. Tetrahedron Lett. 1979, 20, 593.

1. “A New Synthesis of Amides and Macrocyclic Lactams.”

Chen, S. C.; Ganem, B.; Collum, D. B. J. Org. Chem. 1978, 43, 4393.