Stereoselective Iodolactonization of 4-Allenoic Acids with Efficient Chirality Transfer: Development of a New Electrophilic Iodination Reagent
作者:Xiaobing Zhang、Chunling Fu、Yihua Yu、Shengming Ma
DOI:10.1002/chem.201200229
日期:2012.10.15
A highly stereoselective iodolactonization of 4‐allenoic acids with a new sterically demanding electrophilic iodination reagent to afford optically active γ‐butyrolactones has been developed. The reaction shows high efficiency of axial chirality transfer and excellent Z/E selectivity and has been applied to the synthesis of chiral cis‐β,γ‐disubstituted γ‐butyrolactones to give very high diastereomeric
已经开发了一种高度立体选择性的4-烯丙酸碘代内酯化反应,并使用了一种新的空间上要求亲电的碘化试剂,以提供光学活性的γ-丁内酯。该反应显示出较高的轴向手性转移效率和出色的Z / E选择性,已被用于手性顺-β,γ-二取代的γ-丁内酯的合成,具有非常高的非对映异构体和对映异构体过量值。该反应已成功用于天然化合物(+)-顺式威士忌内酯和(+)-顺式-3-甲基-4-癸内酯的合成中。