Visible-light initiated oxidative cyclization of phenyl propiolates with sulfinic acids to coumarin derivatives under metal-free conditions
作者:Wenchao Yang、Shuai Yang、Pinhua Li、Lei Wang
DOI:10.1039/c5cc00878f
日期:——
A visible-light initiated oxidative cyclization of phenyl propiolates with sulfinic acids has been developed at room temperature under metal-free conditions.
Direct and metal-free arylsulfonylation of alkynes with sulfonylhydrazides for the construction of 3-sulfonated coumarins
作者:Wei Wei、Jiangwei Wen、Daoshan Yang、Mengyuan Guo、Yingying Wang、Jinmao You、Hua Wang
DOI:10.1039/c4cc08117j
日期:——
A novel and metal-free procedure has been developed for the construction of sulfonated coumarins via direct arylsulfonylation of alkynes with sulfonylhydrazides.
novel 3-componentsynthesis of sulfonylated coumarins from diaryliodonium salts, arylpropynoates and sulfurdioxide is reported. The reaction proceeds under mild conditions at room temperature in the absence of any catalysts. This transformation is solely driven by visible light and opens a new opportunity for the sustainable synthesis of sulfones via the direct incorporation of sulfurdioxide.