k-selectride reduction of commercially available d-mannitol derived ketones 2b-i produced the corresponding alcohols 3b-i in good yields and with absolute syn-selectivity in almost all the cases. It was proposed that the bulky cyclohexylidene moiety of 3 has a significant role in favoring the reduction with k-selectride via Felkin-Anh model. Subsequently, one of the reduction product 3c has been exploited to synthesize the pheromone I of sugarcane weevil.
使用商业可得的d-
甘露醇衍生
酮类(2b-i)进行k-selectride还原反应,得到了相应的
醇类(3b-i),产率良好且在几乎所有情况下均表现出绝对的顺式选择性。提出3中的体积较大的
环己烯基部分在促进与k-selectride的还原反应中起到了重要作用,符合Felkin-Anh模型。随后,其中一个还原产物3c被用来合成甘蔗象甲虫的信息素I。