Treatment of 1,6-dialkylhexa-1,5-diene-3,4-diones with bis(iodozincio)methane gave zinc alkoxides of cis-5,6-dialkylcyclohepta-3,7-diene-1,3-diol in good yields at room temperature. The reaction proceeded with high stereospecificity. Bis(iodozincio)methane converted the diketone into the cis-divinylcyclopropane-1,2-diol stereoselectively; this diol transformed into the corresponding cycloheptane derivative
Treatment of 1,6-dialkylhexa-1,5-diene-3,4-diones with bis(iodozincio)methane at −78 °C for several hours gave cis-dialkenylcyclopropane-1,2-diols which rearranged into the zinc alkoxides of cis-5,...
1,6-二烷基六-1,5-二烯-3,4-二酮在 -78 °C 下用双(碘锌)甲烷处理数小时,得到顺式二烯基环丙烷-1,2-二醇,其重排为顺式5,...
Preparation of cycloheptane ring by nucleophilic cyclopropanation of 1,2-diketones with bis(iodozincio)methane
The nucleophilic cyclopropanation of hexa-1,5-diene-3,4-diones with bis(iodozincio)methane afforded the Zn alkoxides of cis-dialkenylcyclopropane-1,2-diols stereoselectively. The subsequent oxy-Cope rearrangement afforded the corresponding Zn alkoxides of 5,6-dialkylcyclohepta-3,7-diene-1,3-diols.