Synthesis and Absolute Configuration of (<i>S</i>)-(−)- and (<i>R</i>)-(+)-2,3-Dihydro-2-(1-methylethenyl)-6-methoxybenzofuran
作者:Ricardo Tovar-Miranda、Raúl Cortés-García、Luis Raúl Trinidad-Nino、Pedro Joseph-Nathan
DOI:10.1021/np980521o
日期:1999.8.1
recrystallizations of diastereomeric salts prepared with (S)-(-)-alpha-methylbenzylamine and (R)-(+)-alpha-methylbenzylamine gave the starting materials for the four-step total syntheses of (S)-(-)-2,3-dihydro-2-(1-methylethenyl)-6-methoxybenzofuran (1a) and (R)-(+)-2,3-dihydro-2-(1-methylethenyl)-6-methoxybenzofuran (1b). Their absolute configuration was established by chemical correlation.
通过用(S)-(-)-α-甲基苄基胺和(R)-(+)-α-甲基苄基胺制备的非对映异构盐的重结晶拆分外消旋的2,3-二氢-2-羧基-6-甲氧基苯并呋喃(2),得到(S)-(-)-2,3-dihydro-2-(1-甲基乙烯基)-6-甲氧基苯并呋喃(1a)和(R)-(+)-2四步全合成的原料, 3-二氢-2-(1-甲基乙烯基)-6-甲氧基苯并呋喃(1b)。它们的绝对构型是通过化学相关性建立的。