Rare-Earth-Catalyzed Transsulfinamidation of Sulfinamides with Amines
作者:Daheng Wen、Qingshu Zheng、Chaoyu Wang、Tao Tu
DOI:10.1021/acs.orglett.1c01106
日期:2021.5.7
transsulfinamidation of primary sulfinamides with alkyl, aryl, and heterocyclicamines for the synthesis of diverse secondary and tertiary sulfinamides has been realized. Unlike transition metal-catalyzed cross-coupling approaches restricted to non-commercially available disubstituted O-benzoyl hydroxylamines, this newly developed protocol is suitable for diverse readily available primary and secondary amines without
a new desulfurative method for generating primary, secondary, and tertiary alkyl radicals through visible‐light photoredoxcatalysis. A process that involves the generation of N‐centered radicalsfrom sulfinamide intermediates, followed by subsequent fragmentation, is critical to forming the corresponding alkyl radical species. This strategy has been successfully applied to conjugate addition reactions
regiospecific alkyl addition reaction of (hetero)arene-fused thiophenes has been developed, employing bench-stable N-benzoyl alkyl-sulfinamides as the alkyl sources. This protocol offers a unique desulfuration approach to generate alkyl radicals that proceeds via nitrogen-centered radical intermediates.
Synthesis of 4,7-Difunctionalized Indoles via Imino Exchange and Sulfinyl Migration
作者:Xiaohua Li、Lei Li、Weiyi Wang、Qiuqin He、Renhua Fan
DOI:10.1021/acs.orglett.9b04257
日期:2020.2.7
7-difunctionalized indolesfrom 2-alkynycyclohexadienimines, sulfinamides, and nucleophiles (amines or alcohols) was developed. The process involves imino exchange, cascade cyclization/1,4-nucleophilic addition/aromatization, and 1,3-migration of the sulfinyl group. The 7-sulfinyl group is easy to convert into the sulfonyl or the thioether group through a simple oxidation and reduction reaction.
A Silyl Sulfinylamine Reagent Enables the Modular Synthesis of Sulfonimidamides via Primary Sulfinamides
作者:Mingyan Ding、Ze-Xin Zhang、Thomas Q. Davies、Michael C. Willis
DOI:10.1021/acs.orglett.2c00347
日期:2022.3.4
sulfinamides, using Grignard, organolithium, or organozinc reagents to introduce the carbon fragment. Treatment of these primary sulfinamides with an amine in the presence of a hypervalent iodine reagent leads directly to NH-sulfonimidamides. This two-step sequence is straightforward to perform and provides a modular approach to sulfonimidamides, allowing ready variation of both reaction components, including