The development of the organocatalyticasymmetric one-pot Michael-Darzens condensation giving highly functionalized complex epoxycyclohexanone derivatives with up to four chiral centers is presented. Depending on the reaction conditions, either the polysubstituted 7-oxa-bicyclo[4.1.0]heptan-2-one ring system or 2-chloro-cyclohex-2-enone derivatives can be formed. For the former class of compounds a
Photochemical rearrangement of 2-phenylthio-1,3-cyclohexanediols to deoxysugars. Application to a stereospecific synthesis of (+)-cis-rose oxide
作者:Denis Gravel、Josée Bordeleau
DOI:10.1016/s0040-4039(98)01795-x
日期:1998.10
The present paper reports the stereospecific synthesis of (+)-cis-rose oxide, the unnatural isomer of the fragrant oil isolated from Bulgarian roses and Bourbon geraniums. The synthesis serves to illustrate the potential of a new photochemicalrearrangement of carbocycles to deoxysugars reported earlier.