Reactions of 3-alkyl- and 3,3-dialkyl-1-bromoallenes with organocuprates: Effects of the nature of the cuprate reagent on the regio- and stereoselectivity
作者:Anna Maria Caporusso、Carmela Polizzi、Luciano Lardicci
DOI:10.1016/s0040-4039(00)96867-9
日期:1987.1
Organocuprates induce 1,3- and direct substitution in 3-alkyl- and 3,3-dialkyl-1-bromo-1,2-dienes leading respectively to either terminal acetylenes or allenic hydrocarbons. The nature of the cuprate exerts a prominent role in determining both the regio- and the stereochemistry of these reactions.
Reaction of 1-bromo-1,2-dienes with alkylcuprates as a regio- and stereo-selective route to acetylenic or allenic compounds
作者:Carmela Polizzi、Carla Consoloni、Luciano Lardicci、Anna Maria Caporusso
DOI:10.1016/0022-328x(91)80179-n
日期:1991.10
Alkylcuprates react with 1-bromo-1,2-dienes to give allenic and/or acetylenic products. The selectivity of the crosscoupling is markedly dependent on the nature of the copper reagent, which plays a prominent role in determining both the regio- and the stereo-chemistry. The preparative aspects of these copper-induced reactions are discussed and their possible mechanism discussed.
Direct Determination of the Enantiomeric Purity of Chiral Trisubstituted Allenes by Using Permethylated Cyclodextrin as a Chiral Solvating Agent
作者:Gloria Uccello-Barretta、Federica Balzano、Anna Maria Caporusso、Piero Salvadori
DOI:10.1021/jo00083a026
日期:1994.2
The heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin (TRIMEB) has been successfully used as convenient chiral solvating agent to determine the enantiomeric composition of chiral trisubstituted allenes by H-1 NMR spectroscopy: the analysis of the effect of the molar ratio TRIMEB/allene, temperature, and nature of the solvent allowed us to optimize the experimental conditions to enhance the separation between the signals of the two enantiomers of each allene.
COREY, E. J.;BOAZ, N. W., TETRAHEDRON LETT., 1984, 25, N 29, 3059-3062
作者:COREY, E. J.、BOAZ, N. W.
DOI:——
日期:——
MOOIWEER, H. H.;ELSEVIER, C. J.;WIJKENS, P.;VERMEER, P., TETRAHEDRON LETT., 1985, 26, N 1, 65-66
作者:MOOIWEER, H. H.、ELSEVIER, C. J.、WIJKENS, P.、VERMEER, P.