The copper‐mediated fluroalkylation/cyclization of N‐allyl anilines has been described with unactivated double bonds as the radical acceptor. The reaction provides an efficient and direct access to 3‐fluoroalkyl indolines in moderate to good yields. This protocol combines a simple experimental procedure with low‐costing fluoroalkylated sources and excellent functional group tolerance.
Benzylarylation of <i>N</i>-Allyl Anilines: Synthesis of Benzylated Indolines
作者:Wenzhong Huang、Xiulan Li、Xuemei Song、Qing Luo、Yanping Li、Ying Dong、Deqiang Liang、Baoling Wang
DOI:10.1021/acs.joc.9b00237
日期:2019.5.17
functionalization of methyl arenes across unactivated alkenes is presented. In the presence of MnCl2·4H2O and di-tert-butyl peroxide, N-allyl anilines underwent benzylation/cyclization cascade to give benzylated indolines, which are a previously unmet synthetic goal. This protocol features simple operation, broad substrate scope, and great exo selectivity.
A convenient and highly selective method of synthesis of (E)-N-aryl-N-(1-propenyl)ethanamides via isomerization of respective N-allyl-N-arylethanamides catalyzed by [RuClH(CO)(PPh3)(3)] has been described. N-Allyl-N-arylethanamides have been obtained by allylation of respective N-arylethanamides under PTC conditions. It is proposed that the observed selectivity of the double bond migration to (E)-enamides is due to the interaction of the arene ring with the Ru atom in the transition state. (C) 2001 Elsevier Science Ltd. All rights reserved.