Carlier PR, Lucht BL, Collum DB. 6Li/15N NMR-Based Solution Structural Determination of Et2O- and TMEDA-Solvated Lithiophenylacetonitrile and a LiHMDS Mixed Aggregate. J Am Chem Soc 2002. [DOI: 10.1021/ja00104a064] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]

Collum DB, Depue RT, Klang JA. Metal- and alkoxide-mediated phosphorus-oxygen bond cleavage in (.eta.5-cyclopentadienyl)cobalt phosphinite ester complexes. Organometallics 2002. [DOI: 10.1021/om00136a030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]

Collum DB, Kahne D, Gut SA, DePue RT, Mohamadi F, Wanat RA, Clardy J, Van Duyne G. Substituent effects on the stereochemistry of substituted cyclohexanone dimethylhydrazone alkylations. An x-ray crystal structure of lithiated cyclohexanone dimethylhydrazone. J Am Chem Soc 2002. [DOI: 10.1021/ja00329a039] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]

Galiano-Roth AS, Collum DB. Lithium-6 and sodium-23 NMR spectroscopic studies of metalated hydrazone cryptates. Effects of ion triplet formation on the stereochemistry of alkylation. J Am Chem Soc 2002. [DOI: 10.1021/ja00219a033] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]

DePue RT, Collum DB, Ziller JW, Churchill MR. Alkoxide triggered ligand substitution. Highly stereoselective formation of unsaturated phosphinite ester-molybdenum tetracarbonyl chelates and the x-ray crystal structure of (1-phenylallyl dimethylphosphinite)molybdenum tetracarbonyl. J Am Chem Soc 2002. [DOI: 10.1021/ja00293a050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]

Collum DB, Mohamadi F, Hallock JS. Mercury(II)-mediated opening of cyclopropanes. Effects of proximate internal nucleophiles on stereo- and regioselectivity. J Am Chem Soc 2002. [DOI: 10.1021/ja00361a024] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]

Bernstein MP, Collum DB. Solvent- and substrate-dependent rates of imine metalations by lithium diisopropylamide: understanding the mechanisms underlying krel. J Am Chem Soc 2002. [DOI: 10.1021/ja00071a011] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]

Bernstein MP, Romesberg FE, Fuller DJ, Harrison AT, Collum DB, Liu QY, Williard PG. Structure and reactivity of lithium diisopropylamide in the presence of N,N,N',N'-tetramethylethylenediamine. J Am Chem Soc 2002. [DOI: 10.1021/ja00039a022] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]

Wanat RA, Collum DB, Van Duyne G, Clardy J, DePue RT. Solid-state and solution studies of lithiated 2-carbomethoxycyclohexanone dimethylhydrazone and lithiated cyclohexanone phenylimine. J Am Chem Soc 2002. [DOI: 10.1021/ja00272a042] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]

Romesberg FE, Collum DB. Lithium Dialkylamide Mixed Aggregation: An NMR Spectroscopic Study of the Influence of Hexamethylphosphoramide (HMPA). J Am Chem Soc 2002. [DOI: 10.1021/ja00099a039] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]

Kallman N, Collum DB. 15N, 13C, 6Li NMR spectroscopic studies and colligative measurements of lithiated cyclohexanone phenylimine solvated by tetrahydrofuran. J Am Chem Soc 2002. [DOI: 10.1021/ja00258a035] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]

Galiano-Roth AS, Kim YJ, Gilchrist JH, Harrison AT, Fuller DJ, Collum DB. Lithium diisopropylamide mixed aggregates: structures and consequences on the stereochemistry of ketone enolate formation. J Am Chem Soc 2002. [DOI: 10.1021/ja00013a048] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]

McGuirk PR, Collum DB. Total synthesis of (+)-phyllanthocin. J Am Chem Soc 2002. [DOI: 10.1021/ja00380a035] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]

Collum DB. Solution structures of lithium dialkylamides and related N-lithiated species: results from lithium-6-nitrogen-15 double labeling experiments. Acc Chem Res 2002. [DOI: 10.1021/ar00029a001] [Citation(s) in RCA: 200] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]

Hall PL, Gilchrist JH, Harrison AT, Fuller DJ, Collum DB. Mixed aggregation of lithium enolates and lithium halides with lithium 2,2,6,6-tetramethylpiperidide (LiTMP). J Am Chem Soc 2002. [DOI: 10.1021/ja00025a024] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]

Gilchrist JH, Collum DB. Distinction of symmetric lithium dialkylamide dimers from higher oligomers by inverse-detected nitrogen-15 homonuclear zero-quantum NMR spectroscopy. J Am Chem Soc 2002. [DOI: 10.1021/ja00028a076] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]

Kim YJ, Bernstein MP, Roth ASG, Romesberg FE, Williard PG, Fuller DJ, Harrison AT, Collum DB. Structure and reactivity of lithium diisopropylamide (LDA) in hydrocarbon solutions. Formation of unsolvated ketone, ester, and carboxamide enolates. J Org Chem 2002. [DOI: 10.1021/jo00014a019] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]

Galiano-Roth AS, Collum DB. Structure and reactivity of lithium diisopropylamide (LDA). The consequences of aggregation and solvation during the metalation of an N,N-dimethylhydrazone. J Am Chem Soc 2002. [DOI: 10.1021/ja00199a042] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]

Lucht BL, Collum DB. Ethereal Solvation of Lithium Hexamethyldisilazide: Unexpected Relationships of Solvation Number, Solvation Energy, and Aggregation State. J Am Chem Soc 2002. [DOI: 10.1021/ja00144a012] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]

Collum DB. Is N,N,N',N'-tetramethylethylenediamine a good ligand for lithium? Acc Chem Res 2002. [DOI: 10.1021/ar00022a003] [Citation(s) in RCA: 264] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]

Galiano-Roth AS, Michaelides EM, Collum DB. Lithium-6, carbon-13, and nitrogen-15 NMR spectroscopic studies of lithium dialkylamides. Solution structure of lithium isopropylcyclohexylamide (LICA) in tetrahydrofuran. J Am Chem Soc 2002. [DOI: 10.1021/ja00216a055] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]

Klang JA, Collum DB. Syntheses and reactions of .eta.5-(dimethylboryl)cyclopentadienyl cobalt and rhodium derivatives. Site-specific binding of unsaturated amines. Organometallics 2002. [DOI: 10.1021/om00097a014] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]

Bernstein MP, Collum DB. Metalation of imines by lithium diisopropylamide solvated by N,N,N',N'-tetramethylethylenediamine: evidence for solvent-free open dimer reactive intermediates. J Am Chem Soc 2002. [DOI: 10.1021/ja00055a060] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]

Hall PL, Gilchrist JH, Collum DB. Effects of lithium salts on the stereochemistry of ketone enolization by lithium 2,2,6,6-tetramethylpiperidide (LiTMP). A convenient method for highly E-selective enolate formation. J Am Chem Soc 2002. [DOI: 10.1021/ja00025a023] [Citation(s) in RCA: 134] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]

Wanat RA, Collum DB. On the origin of the stereoselectivity of hydrazone alkylations. Investigation of aggregation effects and solution kinetics. J Am Chem Soc 2002. [DOI: 10.1021/ja00293a043] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]