Approach to the synthesis of side-chain eudesmanediols: synthesis of kudtriol from 1-(α)-santonin
作者:Ravi S. Harapanhalli
DOI:10.1039/p19880003149
日期:——
The synthesis of an eudesmanic alcohol, kudtriol (1), is described along with its 11-deoxy analogue (19) starting from 1 -(α)-santonin in ten steps. The known intermediate methyl (11S)-3-oxoeudesm-4-en-12-oate (5b) was taken through the new intermediates methyl (11S)-eudesm-4-en-12-oate (6), (11S)eudesm-4-en-12-al (17), 11-hydroxyeudesm-4-en-12-al (18), and eudesm-4-ene-11,12-diol (8). The construction
以十个步骤描述了从11- (α)-桑通宁开始合成的奥地斯曼醇,苦丁酚(1)及其11-脱氧类似物(19)的合成。已知的中间体(11 S)-3-oxoeudesm-4-en-12-oate(5b)通过新的中间体(11 S)-eudesm-4-en-12-oate(6),(11 S)eudesm-4-en-12-al(17),11-羟基eudesm-4- en-12-al(18)和eudesm-4-ene-11,12-二醇(8)。最后提到的中间体中侧链二醇部分的构建是通过在(17)。敏化的光氧合暨还原顺序将烯二醇(8)转变为标题化合物(1)。(11 S)eudesm-4-en-12-ol(16)的相似序列产生11-deoxykudtriol(19)。