additive, an economical, eco-friendly and practical strategy has been developed for the visible-light-initiated regioselective sulfonylation/cyclization of 1,6-enynes in a biomass-derived green solvent 2-methylTHF from easily accessible sulfonyl chlorides under open-air conditions at room temperature. Compared with conventional heating conditions, the use of a 3 W blue light-emitting diode (LED) or sunlight
在不使用任何光催化剂和添加剂的情况下,已经开发了一种经济,环保和实用的策略,用于在可见光引发的区域选择性磺酰化/环化由
生物质衍生的绿色溶剂2-甲基THF中的1,6-
炔烃在室温下于露天条件下
氯化物。与常规加热条件相比,使用3 W蓝色发光二极管(LED)或太阳光不仅可以减少能耗,而且还可以最大程度地减少副反应。这种转化具有出色的区域选择性,温和的反应条件,广泛的底物范围和易于扩大规模。此外,机理研究表明该反应涉及磺酰基自由基途径。