Tandem thionation of biomass derived levulinic acid with Lawesson's reagent
作者:Zheng Li、Xing Tang、Yetao Jiang、Miao Zuo、Yangjun Wang、Wei Chen、Xianhai Zeng、Yong Sun、Lu Lin
DOI:10.1039/c6gc00566g
日期:——
Herein we report a tandem thionation of biomass derived levulinicacid (LA) to generate thiophenic compounds. LA is initially converted to several thiophenones then an aromatic di-thionated product, 5-methylthiophene-2-thiol, is...
Mechanistic evidence for the light-induced ring opening of thiophen-2(5H)-ones 1 in alcohols affording α, β-unsaturated mercapto esters 2 is presented. Regio-and stereochemical aspects of the ring closure of alkenylthio (type 3) radicals 15 and 17 to S-heterocycles 16 and 18, of 3-thiahex-5-enyl radicals 4 to (tetrahydrothien-3-yl)methyl radicals 6 and of (2,3-dihydrothien-3-yl)methyl radicals 30 (type