Substituent effects on the stereoselectivity of the acid-catalyzed solvolysis of rigid 1-arylcyclohexene oxides. Further evidence for a mechanism implying different benzylic carbocationic species
A facile route to iodohydrins and epoxides by oxidation of olefin-iodine complexes with pyridinium dichromate
作者:Roberto Antonioletti、Maurizio D'Auria、Antonella De Mico、Giovanni Piancatelli、Arrigo Scettri
DOI:10.1016/s0040-4020(01)88685-3
日期:1983.1
Trisubstituted olefins, activated with I2, are changed into iodohydrins and epoxides by pyridinium dichromate. The conversion shows to proceed in regiospecific and stereospecific manner. Moreover some naturally occurring polyenes, submitted to similar treatment, afford selectively only terminal iodohydrins. These latter are converted into the corresponding epoxides through a new and convenient alumina
Preparation and stereochemical characterization of the diastereoisomeric 1-phenyl-4-t-butylcyclohexene oxides and 1-phenyl-4-t-butylcyclohexane-1,2-diols
作者:G. Berti、B. Macchia、F. Macchia
DOI:10.1016/s0040-4020(01)82481-9
日期:1968.1
cis and trans forms of 1-phenyl-4-t-butylcyclohexene oxide were prepared and their conversion into the corresponding glycols was investigated. Several methods, some of which highly stereospecific, were found for the preparation of all four possible diastereoisomeric glycols 5-8, as shown in Chart I. Dimethyl sulphoxide proved to be a good solvent for the diaxial cleavage of epoxides by alkali, while