Enantioselective synthesis of isoquinoline alkaloids: phenylethylisoquinoline and aporphine alkaloids
作者:Zbigniew Czarnocki、David B. MacLean、Walter A. Szarek
DOI:10.1139/v87-393
日期:1987.10.1
A new and improved procedure for the preparation of (R)-2-alkoxycarbonyl-1-formyl-1,2,3,4-tetrahydro-6,7-dimethoxyisoquinolines has been developed beginning from D-(−)-tartaric acid. The utility of these aldehydes in the asymmetric synthesis of isoquinoline alkaloids of high enantiomeric purity has been extended to the synthesis of phenylethylisoquinolines, which have been further transformed in straightforward
从 D-(-)-酒石酸开始,开发了一种新的改进方法,用于制备 (R)-2-alkoxycarbonyl-1-formyl-1,2,3,4-四氢-6,7-二甲氧基异喹啉。这些醛在高对映体纯度的异喹啉生物碱的不对称合成中的用途已扩展到苯乙基异喹啉的合成,后者已通过直接步骤进一步转化为高原小檗碱和高卟啉环系统。以这种方式,已经合成了 (S)-高莫拉丹苷、(S)-5'-甲氧基高莫拉丹苷、(S)-2,3,9,10,11-五甲氧基高原小檗碱和 (S)-O-methylkreysigine。(S)-laudanosine 转化为 (S)-glaucine,一种阿朴啡生物碱,也已实现。