Enantioselective Intramolecular Cyclopropanations of Allylic and Homoallylic Diazoacetates and Diazoacetamides Using Chiral Dirhodium(II) Carboxamide Catalysts
作者:Michael P. Doyle、Richard E. Austin、A. Scott Bailey、Michael P. Dwyer、Alexey B. Dyatkin、Alexey V. Kalinin、Michelle M. Y. Kwan、Spiros Liras、Christopher J. Oalmann
DOI:10.1021/ja00126a016
日期:1995.5
counterparts, but allylicdiazoacetates are subject to greater variations in enantioselectivities with changes in substitution patterns on the carbon-carbon double bond. For example, the enantioselectivities in the intramolecularcyclopropanations of 3-allcyl/aryl-2(Z)-alken-l-y1 diazoacetates are generally 194%, whereas the cyclizations of the homologous 4-alkyl/aryl-3(Z)-alken1-yl diazoacetates are typically
Iodocyclopropanes as versatile intermediates for the synthesis of substituted cyclopropanes
作者:Stephen F. Martin、Michael P. Dwyer
DOI:10.1016/s0040-4039(98)00072-0
日期:1998.3
Iodocyclopropanes are versatile synthetic intermediates that have been used to prepare a variety of alkyl, aryl and acyl substituted cyclopropanes via organometallic reactions.