Synthesis of Thioesters from Aldehydes via N‐Heterocyclic Carbene (NHC) Catalyzed Radical Relay
作者:Yunquan Man、Xiaojun Zeng、Bo Xu
DOI:10.1002/chem.202203716
日期:2023.3.22
efficient reaction has been developed for thioesterification of aldehydesviaradicalrelay by NHC catalysis. The key step is the coupling of the Breslow radical cation with the heteroatom radical (sulfur-radical). The excellent yields and broad substrate scope illustrated the efficiency of this strategy for achieving novel reactions viaNHC catalysis.
Copper-Catalyzed Aerobic <i>S</i>-Amination of Sulfenamides for the Synthesis of Sulfinamidines
作者:Guoling Huang、Jianlin Ye、Minxi Tan、Yuetong Chen、Xunbo Lu
DOI:10.1021/acs.joc.3c01353
日期:2023.12.1
Herein, we present a copper-catalyzed oxidative amination of sulfenamides for the synthesis of sulfinamidines. By the employment of air as the terminal oxidant, a diverse array of secondary and primary amines can be efficiently transformed into their corresponding products. This method is well-suited for last-stage functionalization, and the underlying mechanism has been investigated. The transformation
BF<sub>3</sub> ⋅ Et<sub>2</sub>O‐Mediated Annulation of 2‐Alkynyl Biaryls with <i>N</i>‐(Arylthio) Succinimides: An Efficient Approach to Access 9‐Sulfenylphenanthrenes
A simple and effective method for the synthesis of 9-sulfenylphenanthrenes was developed. The reaction proceeds through BF3 ⋅ OEt2-mediated annulation of 2-alkynyl biaryls with N-arylthio succinimides at roomtemperature. With this method, a series of 9-sulfenylphenanthrenes was efficiently obtained in good to excellent yields under mild and metal-free conditions.
Enantioselective Reduction and Sulfenylation of Isoflavanone Derivatives via Bisguanidinium Hypervalent Silicate
作者:Qiaoqiang Li、Yuqing Dai、Xinru Xu、Wentao Wu、Wenchao Chen、Hong Wang、Choon-Hong Tan、Xinyi Ye
DOI:10.1021/acs.orglett.4c02202
日期:2024.7.26
In this work, we describe an enantioselective reduction and sulfenylation of isoflavanone derivatives by an ion pair strategy. The chiral cationic catalyst bisguanidinium (BG) is capable of chiral induction in catalytic systems. Silane hydride works as a reductant and helps to form an anionic hypervalent silicate complex and intermediates with substrates to pair with chiral catalyst. A series of umpolung
Enantioselective Synthesis of Sulfinamidines via Asymmetric Nitrogen Transfer from N−H Oxaziridines to Sulfenamides
作者:Marc Fimm、Fumito Saito
DOI:10.1002/anie.202408380
日期:2024.8.26
Herein is reported an enantioselective synthesis of sulfinamidines by electrophilicamination of sulfenamides with enantiopure N−H oxaziridines. The enantioenriched sulfinamidines show remarkable chemical and configurational stability against high temperature, acids, and bases in non-aqueous solution. One-pot, three-component, enantioselective synthesis of sulfinamides is further demonstrated by employing