Catalyst-free chemoselective α-sulfenylation/β-thiolation for α,β-unsaturated carbonyl compounds
作者:Xi Huang、Juan Li、Xiang Li、Jiayi Wang、Yanqing Peng、Gonghua Song
DOI:10.1039/c9ra05708k
日期:——
A novel, efficient, catalyst-free and product-controllable strategy has been developed for the chemoselective α-sulfenylation/β-thiolation of α,β-unsaturated carbonyl compounds. An aromatic sulfur group could be chemoselectively introduced at α- or β-position of carbonyls with different sulfur reagents under slightly changed reaction conditions. A series of desired products were obtained in moderate
开发了一种新颖、高效、无催化剂且产物可控的策略,用于 α,β-不饱和羰基化合物的化学选择性 α-磺基化/β-硫醇化。在稍微改变反应条件下,可以使用不同的硫试剂在羰基的α-或β-位上化学选择性地引入芳香族硫基团。以中等至优异的收率获得了一系列所需的产物。机理研究表明,B 2 pin 2在激活α,β-不饱和羰基化合物向β-硫醇化转变中发挥关键作用。这种无过渡金属催化剂的方法为α,β-不饱和羰基化合物的α-硫醇化或β-磺酰化产物的高度化学选择性制备提供了便捷有效的工具。