A photocatalyst-free aqueous-phase hydrosulfonylation of alkenes and alkynes with sulfonyl chlorides is described. The reaction proceeds efficiently under visible light irradiation in the presence of (TMS)3SiH and features mild conditions, broad substrate scope and excellent functional-group compatibility, offering a convenient and sustainable method for the synthesis of sulfones.
Examples illustrate the direct conversion of aldehydes to esters using bromine in alcohol solvents with sodium bicarbonate buffer. The convenient and efficient one-pot procedure is compatible with secondary hydroxyl groups as well as a variety of -protecting units such as MOM, MEM, Ph2tBuSi, benzyl, benzoyl, and isopropylidene functions.
实施例说明在乙醇溶剂中用碳酸氢钠缓冲液使用溴将醛直接转化为酯。方便,有效的一锅法可与仲羟基以及多种保护单元(例如MOM,MEM,Ph 2 t BuSi,苄基,苯甲酰基和异亚丙基)兼容。