作者:Leo A. Paquette、Philip G. Meister、Dirk Friedrich、Daryl R. Sauer
DOI:10.1021/ja00054a007
日期:1993.1
A completely stereocontrolled total synthesis of (-)-subergorgic acid (1) has been accomplished. The starting β-hydroxy ketone was prepared in optically pure condition by lipase-promoted hydrolysis of the racemic chloroacetate.Ring A was introduced by a reaction sequence that included a Mukaiyama-type aldol condensation and subsequent photochemical oxidation with (diacetoxyiodo)benzene and iodine.
已经完成了(-)-次高酸(1)的完全立体控制的全合成。起始 β-羟基酮是在光学纯条件下通过脂肪酶促进的外消旋氯乙酸酯水解制备的。通过包括 Mukaiyama 型羟醛缩合和随后用(二乙酰氧基碘)苯和碘进行光化学氧化的反应序列引入环 A。为了允许在环 C 内进行适当的官能化,通过 Pd(II) 促进的衍生烯醇三氟甲磺酸酯与甲酸离子的还原,将羰基转化为内部双键