Ynones Merge Activation/Conjugate Addition of Chalcogenoborates ArE-Bpin (E=Se, S)
作者:Marc G. Civit、Xavier Sanz、Christopher M. Vogels、Carles Bo、Stephen A. Westcott、Elena Fernández
DOI:10.1002/adsc.201500650
日期:2015.10.12
The “pull–push” effect of the Bpin moiety in ArE-Bpin reagents (E=Se, S) is demonstrated by the Lewis acid interaction with the carbonyl group of ynones and the concomitant delivery of ArSe or ArS to the electron-deficient alkyne with impressive stereoselectivity. The two component reactivity is carried out in methanol to generate (Z)-β-(arylseleno)-α,β-unsaturated ketones and (Z)-β-(arylsulfuro)-α