One-Pot Synthesis of 6-Hydroxyisochromans: The Example of Demethyl-oxa-coclaurine
作者:Marcella Guiso、Armandodoriano Bianco、Carolina Marra、Claudia Cavarischia
DOI:10.1002/ejoc.200300182
日期:2003.9
The successful one step synthesis did not require protecting groups and provided high yields. The obtainment of 1-(4′-hydroxybenzyl)-6,7-dihydroxyisochroman (1) indicates that this protocol can be used to synthesize oxygenated analogues of benzyl-tetrahydroisoquinoline alkaloids, such as demethyl-coclaurine (2). This methodology could provide a general procedure for the synthesis of hydroxyisochromans
使用我们最近描述的修改过的 oxa-Pictet Spengler 反应,我们合成了 6-羟基-异色满及其 7-羟基衍生物。成功的一步合成不需要保护基团并提供了高产率。1-(4'-hydroxybenzyl)-6,7-dihydroxyisochroman (1) 的获得表明该协议可用于合成苄基-四氢异喹啉生物碱的含氧类似物,如 demethyl-coclaurine (2)。这种方法可以提供合成羟基异色满的通用程序。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)