PdCl2-catalyzed hydrosulfonamidation of homo allylic alcohols: an efficient synthesis of allylic sulfonamides
摘要:
A new protocol for the palladium chloride-catalyzed direct hydrosulfonamidation of homoallylic alcohols with migration of the double bond is described. This method requires no preactivation of alcohols and the reaction is environmentally benign with water as the only by-product. Various homoallylic alcohols on hydrosulfonamidation with sulfonamides gave the corresponding products in good yields. (C) 2011 Elsevier Ltd. All rights reserved.
Reactions of a,ß-unsaturated<i>N</i>-benzenesulfonyl Imine -<i>N</i>-[(2<i>E</i>)-3-phenyl-2-propen-1-ylidene]benzenesulfonamide with Methyllithium
作者:Gon-Ann Lee、Hsin-Yi Lee、Wei-Cheng Chen、Yen-Huei Lin
DOI:10.1002/jccs.201500082
日期:2015.7
α,β‐Unsaturated N‐benzenesulfonyl imine 1 was treated with 1.1 eq methyllithium to afford 1,2‐addition adduct as a sole product. However, when compound 1 was treated with 2 eq MeLi, 1,2‐addition product, benzenesulfonamide derivative 3 and 2H‐1,2‐benzothiazine 1,1‐dioxide derivatives 4 and 5 were isolated.
用1.1 eq甲基锂处理α,β-不饱和N-苯磺酰基亚胺1,以提供1,2-加成物作为唯一产物。但是,当化合物1用2当量MeLi,1,2加成产物处理时,分离出苯磺酰胺衍生物3和2 H 1,2,1,2-苯并噻嗪1,1-二氧化衍生物4和5。