Synthesis and Absolute Configuration of (+)-Phrymarolin I, a Lignan
作者:Fumito Ishibashi、Eiji Taniguchi
DOI:10.1246/cl.1986.1771
日期:1986.10.5
(+)-Phrymarolin I was synthesized from (S)-(+)-β-vinyl-γ-butyrolactone, and the absolute configuration of the natural product was established as (1S,2S,5R,6S).
Facile Production Scale Synthesis of (<i>S</i>)-Taniguchi Lactone: A Precious Building-Block
作者:Fredrik von Kieseritzky、Yeliu Wang、Magnus Axelson
DOI:10.1021/op500096j
日期:2014.5.16
A cost-efficient and facile synthesis of (S)-4-vinyldihydrofuran-2(3H)-one ((S)-1), better known as (S)-Taniguchi lactone, is described. Racemic Taniguchi lactone rac-1 was ring-opened with (S)-1-benzylmethylamine providing a diastereomeric mixture of hydroxyl-amides. The desired diastereomer (S,S)-2 was isolated by crystallization and subjected to acidic hydrolysis to release enantiopure title compound in good overall yield with an er in excess of 99%. The process was successfully scaled up to kilogram quantities.