作者:Peter Wipf、Wenjing Xu
DOI:10.1021/jo960845m
日期:1996.1.1
structurally novel antimitotic agent curacin A was prepared in 15 steps and in 2.6% yield for the longest linear sequence. Key steps in our synthesis are the use of a hydrozirconation-transmetalation protocol for the preparation of divinyl alcohol 8, the stereoselective formation of the acyclic triene segment 11 via enol triflate chemistry, and a second hydrozirconation of the conjugated triene followed
以15个步骤制备结构新颖的抗有丝分裂剂curacin A,以2.6%的收率获得最长的线性序列。我们合成过程中的关键步骤是使用氢化锆-重金属化方案制备二乙烯醇8,通过烯醇三氟甲磺酸酯化学方法选择性地形成无环三烯链段11,以及将共轭三烯进行第二次氢化锆反应,然后进行异氰酸酯插入。为了制备姜黄素A的杂环部分,恶唑啉->噻唑啉的转化提供了对敏感海洋天然产物的有效利用。