(–)-Quinic acid in organic synthesis. Part 4. Syntheses of cyclophellitol and its (1R, 6S)-, (2S)-, (1R, 2S, 6S)-diastereoisomers
作者:Tony K. M. Shing、Vincent W.-F. Tai
DOI:10.1039/p19940002017
日期:——
Cyclophellitol 1 and its (1R, 6S)-, (2S)-, (1R, 2S, 6S)-diastereoisomers 2, 3 and 4 are constructed from quinic acid involving the following key steps: regioselective cyclic sulfate ring opening, regiospecific oxidative elimination and an epoxidation. Diastereoisomers 1, 2, 3 and 4 are characterized as their corresponding tetraacetates 5, 6, 7 and 8.
Cyclophellitol 1和它的(1 - [R,6小号) - ,(2小号) - ,(1 - [R,2小号,6小号)-diastereoisomers 2,3和4是从奎尼酸涉及以下主要步骤构成:区域选择性环硫酸酯开环,区域特异性氧化消除和环氧化。对映异构体1,2,3和4的特征为它们相应的四乙酸盐5,6,7和8。