Reduction of propargylic sulfones to (Z)-allylic sulfones using zinc and ammonium chloride
摘要:
Propargylic sulfones can be cis-hydrogenated using commercial zinc powder and ammonium chloride in THF-water at room temperature, the major products being the corresponding (Z)-allylic sulfones. Other reducible groups (alkene, benzyloxy) are not affected. Allenylsulfones are implicated in one of the possible reaction pathways. (c) 2007 Elsevier Ltd. All rights reserved.
Hydrosulfonylation of Unactivated Alkenes by Visible Light Photoredox Catalysis
作者:Juan-Juan Wang、Wei Yu
DOI:10.1021/acs.orglett.9b03636
日期:2019.11.15
hydrosulfonylation of unactivated alkenes with sodium sulfinates was realized via [Ir(dF(CF3)ppy)2(dtbbpy)]PF6-mediated visiblelightphotoredoxcatalysis. The presence of an acid such as acetic acid is essential for the reaction to take place. A variety of unactivated alkenes can be transformed into sulfones with good yield and high regioselectivity using this reaction, which is proposed to proceed by a radical