Alkyl, allyl, and propargyl β-iodopropionates undergo a cyclopropanation by the reaction with zinc-copper couple and TBDMSCl in THF to give 1-alkoxy-, 1-allyloxy-, and 1-propargyloxy-1-tert-butyldimethylsiloxycyclopropanes in moderate or good yields. β-Iodo-α-methylpropionates 2 and 6 provide trans-5 and trans-8 selectively, while β-iodobutyrates 3 and 7 furnish cis-5 and cis-8 selectively.
烷基,烯丙基和炔丙基β-
碘丙酸酯通过与
锌-
铜对和TB
DMSCl在THF中反应而进行
环丙烷化,生成中度或良好的1-烷氧基-,1-烯丙氧基-和1-炔丙基氧基-1-叔丁基二甲基甲
硅烷氧基
环丙烷产量。β
碘α-methylpropionates 2和6提供反式- 5和反式- 8选择性,而β-iodobutyrates 3个7配料顺- 5和顺- 8选择性。