Rongalite® and base-promoted cleavage of disulfides and subsequent Michael addition to α,β-unsaturated ketones/esters: an odorless synthesis of β-sulfido carbonyl compounds
摘要:
A highly practical method to access beta-sulfido carbonyl compounds was developed, which could be conducted without any expensive reagent, special apparatus/technique, and no requirement of metal catalysts. beta-Sulfido carbonyl compounds were formed at room temperature, in short time and with high chemoselectivity in good to excellent yields. A plausible mechanism for the role of Rongalite (R), as a promoter for the cleavage of disuffides generating thiolate anions that then undergo facile thia-Michael addition to alpha,beta-unsaturated ketones and esters is proposed. (C) 2010 Elsevier Ltd. All rights reserved.
Hydroxysulfenylation of Electron-Deficient Alkenes through an Aerobic Copper Catalysis
作者:Hui Xi、Bicheng Deng、Zhenzhen Zong、Shenglin Lu、Zhiping Li
DOI:10.1021/acs.orglett.5b00112
日期:2015.3.6
A copper-catalyzed hydroxysulfenylation of α,β-unsaturated esters/amides is reported. The method presents a selective and efficient synthesis of β-hydroxysulfides bearing electron-withdrawing groups. The synthetic utility of this method is demonstrated by the concise synthesis of the anticancer drug bicalutamide.
Increasing the affinity of calstabin-2 for the cardiac calcium channel RyR2 and thereby stabilizing the channel in the closed state has recently been identified as novel mechanism for treating heart failure, particularly ventricular arrhythmias. JTV-519, a 1,4-benzothiazepine derivative, has been shown to stabilize the calstabin2/RyR2 complex. Novel derivatives of JTV-519 that may be useful in treatment or prevention of heart failure, atrial fibrillation, or exercise-induced cardiac arrhythmias are provided. Synthetic methodology and intermediates in the synthesis of the inventive JTV-519 derivatives are also described.
A Novel Synthesis of β-Arylthio Propanoic Esters Promoted by Low-Valent Titanium
作者:Daqing Shi、Zaisheng Lu、Lailong Mu、Guiyuan Dai
DOI:10.1080/00397919808003075
日期:1998.3.1
Promoted by low-valent titanium, aryl sulfonyl chlorides react with alpha,beta-unsaturated esters in THF to give beta-arylthio propanoic esters in moderate to good yields.
US2199799
申请人:——
公开号:——
公开(公告)日:——
Rongalite® and base-promoted cleavage of disulfides and subsequent Michael addition to α,β-unsaturated ketones/esters: an odorless synthesis of β-sulfido carbonyl compounds
A highly practical method to access beta-sulfido carbonyl compounds was developed, which could be conducted without any expensive reagent, special apparatus/technique, and no requirement of metal catalysts. beta-Sulfido carbonyl compounds were formed at room temperature, in short time and with high chemoselectivity in good to excellent yields. A plausible mechanism for the role of Rongalite (R), as a promoter for the cleavage of disuffides generating thiolate anions that then undergo facile thia-Michael addition to alpha,beta-unsaturated ketones and esters is proposed. (C) 2010 Elsevier Ltd. All rights reserved.