Stereoselective synthesis of morphine fragments trans- and cis-octahydro-1H-benzo[4,5]furo[3,2-e]isoquinolines
作者:Ling-Wei Hsin、Li-Te Chang、Chien-Wei Chen、Chia-Huei Hsu、Hung-Wei Chen
DOI:10.1016/j.tet.2004.10.067
日期:2005.1
8a-(2-hydroxy-3-methoxyphenyl)-1,2,3,4,6,7,8,8a-octahydroisoquinoline (11) via an unusual Claisen rearrangement. 9-Methoxy-3-methyl-2,3,5,6,7,7a-hexahydro-1H-benzofuro[3,2-e]isoquinoline (7) was successfully transformed to trans-octahydroisoquinoline 3 and cis-octahydroisoquinoline 4 via catalytical hydrogenation over PtO2 and chemical reduction with acidic NaBH4, respectively.
已开发了吗啡ACNO部分结构的立体选择性合成方法。钯催化氨基甲酸酯2的环化反应,得到四环(ACNO)3-乙氧基羰基-9-甲氧基-2,3,5,6,7,7a-六氢-1 H-苯并呋喃[3,2- e ]异喹啉(14) ; 在相同反应条件下处理5-(2-溴-6-甲氧基苯氧基)-2-甲基-1,2,3,4,5,6,7,8-八氢异喹啉(8),得到8a-(2-羟基3-甲氧基苯基)-1,2,3,4,6,7,8,8a-八氢异喹啉(11)通过不寻常的克莱森重排。9-甲氧基-3-甲基-2,3,5,6,7,7a-六氢-1 H-苯并呋喃[3,2- e ]异喹啉(7)中的溶液成功转化到反式-octahydroisoquinoline 3和CIS -octahydroisoquinoline 4经由在PtO的催化加氢2和化学还原与酸性的NaBH 4,分别。