A Novel and Highly Efficient Asymmetric Synthesis of Optically Active Anthracyclinones
作者:Michiyo Suzuki、Yoshikazu Kimura、Shiro Terashima
DOI:10.1246/bcsj.59.3559
日期:1986.11
synthon of optically active 11-hydroxyanthracyclinones, >95% ee, in one pot reaction. Application of the explored synthetic scheme to 2-acetyl-5,12-dimethoxy- and 2-acetyl-5-methoxy-3,4-dihydro-6,11-naphthacenedione similarly gave (R)-2-acetyl-2,5,12-trihydroxy- and (R)-2-acetyl-2,5-dihydroxy-1,2,3,4-tetrahydro-6,11-naphthacenedione, the advanced key synthetic intermediates of optically active 4-demethoxy-
发现衍生自 2-乙酰基-5,8-二甲氧基-3,4-二氢萘和 (R,R)-N,N:N',N'-四烷基酒石酰胺的旋光缩醛的溴内酯化具有高度非对映选择性,得到七元溴内酯和溴醇的混合物。主要产生的溴内酯可以有效地转化为 (R)-2-乙酰基-5,8-二甲氧基-1,2,3,4-四氢-2-萘酚,光学活性 11-羟基蒽环酮的 AB 环合成子,> 95% ee,一锅反应。将探索的合成方案应用于 2-乙酰-5,12-二甲氧基-和 2-乙酰-5-甲氧基-3,4-二氢-6,11-萘二酮同样得到 (R)-2-乙酰-2,5 ,12-三羟基-和 (R)-2-乙酰基-2,5-二羟基-1,2,3,4-四氢-6,11-萘二酮,