Total Synthesis of Thromboxane B<sub>2</sub> via a Key Bicyclic Enal Intermediate
作者:Changcheng Jing、Varinder K. Aggarwal
DOI:10.1021/acs.orglett.0c02299
日期:2020.8.21
A 12-step asymmetric synthesis of thromboxane B2 (TxB2) from 2,5-dimethoxytetrahydrofuran is described. The synthesis employs our organocatalytic aldol reaction of succinaldehyde to give a key bicyclic enal intermediate. From here, the synthetic strategy involves a conjugate addition of an alkenyl side chain to the bicyclic enal, Baeyer–Villiger oxidation, and a highly Z-selective Wittig olefination
描述了由2,5-二甲氧基四氢呋喃的12步不对称合成血栓烷B 2(TxB 2)。该合成利用我们的琥珀醛的有机催化醛醇缩合反应生成关键的双环烯醛中间体。从这里开始,合成策略包括将烯基侧链共轭添加到双环烯醛,Baeyer-Villiger氧化和半缩醛的高Z选择性Wittig烯化反应。成功的关键是最大程度地减少氧化还原操作和按正确顺序对官能团进行的操作。