Stereodivergent synthesis of alkenes by controllable <i>syn</i>-/<i>anti</i>-fragmentation of β-hydroxysulfonyl intermediates
作者:Bartosz Górski、Dariusz Basiak、Łukasz Grzesiński、Michał Barbasiewicz
DOI:10.1039/c9ob01563a
日期:——
The reduction of the carbonyl group in acylated trifluoroethyl alkanesulfonates follows the Felkin-Ahn selectivity, and the so-formed diastereomeric β-hydroxysulfonyl intermediates undergo syn- and anti-fragmentation, depending on the reaction conditions. In effect, isomeric E- and Z-alkenes are formed in a stereodivergent manner, which mimics the mechanistic manifold of the Peterson olefination.
酰化的三氟乙基链烷磺酸盐中羰基的还原遵循Felkin-Ahn选择性,并且根据反应条件,如此形成的非对映异构体β-羟基磺酰基中间体会发生合成和反片段化。实际上,以立体发散的方式形成异构的E-和Z-烯烃,其模仿了Peterson烯烃化反应的机理。