Enantioselective synthesis of vinylcyclopropanes by rhodium(II) catalyzed decomposition of vinyldiazomethanes in the presence of alkenes
作者:Huw M.L. Davies、Debra K. Hutcheson
DOI:10.1016/s0040-4039(00)79298-7
日期:1993.11
Rhodium(II) N-(arenesulfonyl)prolinate catalyzed decomposition of vinyldiazomethanes in the presence of alkenes resulted in highly diastereoselective and enantioselective cyclopropanations.
Asymmetric Cyclopropanations by Rhodium(II) <i>N</i>-(Arylsulfonyl)prolinate Catalyzed Decomposition of Vinyldiazomethanes in the Presence of Alkenes. Practical Enantioselective Synthesis of the Four Stereoisomers of 2-Phenylcyclopropan-1-amino Acid
作者:Huw M. L. Davies、Paul R. Bruzinski、Debra H. Lake、Norman Kong、Michael J. Fall
DOI:10.1021/ja9604931
日期:1996.1.1
to]dirhodium. The carbenoid structure has a critical effect on the degree of asymmetric induction, and the combination of a small electron-withdrawing group such as a methyl ester and an electron-donating group such as vinyl or phenyl resulted in the highest levels of enantioselectivity. The use of electron neutral alkenes and pentane as solvent also enhanced the enantioselectivity of the process.