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
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.
Metal- and additive-free transsulfinamidation of N-unsubstituted sulfinamides and N-pivaloyl-protected sulfinamides with various amines is reported. With this method, both N-monosubstituted and N,N-disubstituted sulfinamides were obtained in good yields simply by heating. Preliminary experiments also indicate that alcohols can be used as nucleophiles instead of amines and can provide sulfinate esters
Diastereoconvergent Synthesis of <i>trans</i>-5-Hydroxy-6-Substituted-2-Piperidinones by Addition–Cyclization–Deprotection Process
作者:Chang-Mei Si、Wei Huang、Zhen-Ting Du、Bang-Guo Wei、Guo-Qiang Lin
DOI:10.1021/ol5020812
日期:2014.8.15
A diastereoselective one-pot approach to access trans-5-hydroxy-6-substituted-2-piperidinones by an addition-cyclization-deprotection process has been developed, in which the stereogenic center at the C-6 position was solely controlled by alpha-OTBS group. The utility of this transformation is demonstrated by the asymmetric synthesis of the enantiomer of (-)-CP-99,994.