of (+)-zaragozic acid C is described. Key features of the synthesis are the use of a double Sharpless asymmetric dihydroxylation reaction of diene 6 to control stereochemistry at four contiguous stereocenters from C3 to C6; the introduction of the C1-side chain by reaction between the anion derived from the dithiane monosulfoxide 27 and the core aldehyde 12; a high yielding, acid-mediated simultaneous
描述了(+)-泽拉果酸C的全合成。合成的关键特征是使用二烯6的双重Sharpless不对称二羟基化反应来控制从C3到C6的四个连续的立体中心的立体
化学。通过衍生自二
噻吩二亚砜27的阴离子与核心醛12之间的反应引入C 1侧链;一种高产的,酸介导的同时进行的
丙酮化物脱保护-二
硫乙烷去除-
缩酮化方法,仅产生2,8-二氧杂
双环[3.2.1]辛烷核心34; 以及新颖的三氧化过程,可以安装
三羧酸。