Synthesis of Functionalized Thietanes via Electrophilic Carbenoid-Induced Ring Expansion of Thiiranes with Sulfonium Acylmethylides as Carbene Precursors
作者:Jun Dong、Hongguang Du、Jiaxi Xu
DOI:10.1021/acs.joc.9b01152
日期:2019.9.6
Various functionalized thietanes were prepared from thiiranes via an electrophilic ring expansion with rhodium carbenoids as electrophiles generated from safe and readily accessible dimethylsulfonium acylmethylides. The reaction appears to proceed through electrophilic metallocarbenoid-induced activation of thiiranes, nucleophilic ring-opening of the activated thiiranes with dimethyl sulfide as a transient
Facile synthesis of thietanes via ring expansion of thiiranes
作者:Jun Dong、Jiaxi Xu
DOI:10.1039/c6ob02387h
日期:——
Thietanes are pharmaceutically important cores of some biological compounds and intermediates of organic synthesis. Various thietanes were prepared from thiiranes via ring expansion through a reaction with trimethyloxosulfonium iodide in the presence of sodium hydride. The reaction process is a nucleophilic ring-opening reaction of thiiranes with dimethyloxosulfonium methylide, generated from trimethyloxosulfonium
SURFACE-TREATING AGENT FOR PATTERN FORMATION AND PATTERN-FORMING METHOD USING THE SURFACE-TREATING AGENT
申请人:HOSHINO Wataru
公开号:US20080241742A1
公开(公告)日:2008-10-02
A surface-treating agent for forming a resist pattern, includes: a compound represented by formula (1) as defined in the specification, wherein the surface-treating agent is used in a step between a formation of a first resist pattern on a first resist film and a formation of a second resist film on the first resist pattern to form a second resist pattern, and a pattern-forming method uses the surface-treating agent.
NBS/DMSO-mediated synthesis of (2,3-dihydrobenzo[<i>b</i>][1,4]oxathiin-3-yl)methanols from aryloxymethylthiiranes
作者:Jun Dong、Jiaxi Xu
DOI:10.1039/c8nj01117f
日期:——
4]oxathiin-3-yl)methanols were synthesized via reactions of aryloxymethylthiiranes and N-bromosuccinimide (NBS) in DMSO under microwave irradiation. The reaction mechanism was proposed as an intramolecular aromatic electrophilic substitution of 1-bromo-2-(aryloxymethyl)thiiran-1-iums, generated from aryloxymethylthiiranes and NBS, and the subsequent DMSO nucleophilic ring opening reaction of thiiran-1-iums followed by
通过芳氧基甲基硫烷和N-溴琥珀酰亚胺(NBS)在DMSO下微波辐射反应合成了(2,3-二氢苯并[ b ] [1,4]氧杂嘧啶-3-基)甲醇。该反应机理被认为是由芳氧基甲基噻喃和NBS生成的1-溴-2-(芳氧基甲基)噻喃-1-鎓的分子内芳族亲电取代,以及随后的噻吩-1-鎓的DMSO亲核开环反应,随后是排水量。当前的方法提供了一种直接和简单的策略,可以从容易获得的芳氧基甲基噻喃有效地制备(2,3-二氢苯并[ b ] [1,4]氧杂蒽-3-基)甲醇。