Synthesis of non-peptide scaffolding domains via a totally stereoselective iodolactonization protocol
作者:J.R. Hauske、Susan M. Julin
DOI:10.1016/s0040-4039(00)74043-3
日期:1993.7
Exposure of the chiral, non-racemic, allylic ester 7 to LDA/MSCl provides acid 8 and subsequent iodolactonization of 8 provides one lactone (9) with total stereoselectivity. X-ray analysis of the corresponding α-methylbenzylamides of 8 and 9 confirmed the absolute stereochemistry of the trans-anti-trans lactone (9). The synthesis is completed by treatment of 9 with the enolate of t-butyl acetate affording
手性,非外消旋,烯丙基酯7暴露于LDA / MSC1可提供酸8,随后碘内酯化8可提供一种具有完全立体选择性的内酯(9)。对相应的8和9的α-甲基苄基酰胺进行X射线分析,证实了反-反-反内酯(9)的绝对立体化学。通过用乙酸叔丁酯的烯酸酯处理9来完成合成,得到四氢呋喃基衍生物12。