已在21种常规溶剂和17种离子液体中动力学评估了溶剂对标题反应反应机理的影响。溶剂极性对催化的S N Ar途径和未催化的S N Ar途径的影响不同。作为氢键供体/受体的水和甲酰胺的两亲特性在亲核体的氮中心诱导亲核活化。离子液体EMIMDCN似乎是S N Ar途径的最佳溶剂,这可能是由于二氰胺阴离子的高极化率。
申请人:Ewha University - Industry Collaboration Foundation 이화여자대학교 산학협력단(220040083301) BRN ▼110-82-10456
公开号:KR102239790B1
公开(公告)日:2021-04-13
본 발명은 화학식 1로 표시되는 벤젠설폰아미드 화합물 또는 이것이 바이오틴화된 화합물을 제공한다. 본 발명의 화합물은 시스테인의 산화되지 않은 설프하이드릴기(-SH)와 선택적으로 반응하고, 산화적 변형물과는 반응하지 않는 작용효과를 나타낸다. 따라서, 본 발명의 화합물은 시스테인의 설프하이드릴기를 검출할 수 있다. 또한, 본 발명의 화합물은 각각의 시스테인의 산화반응에 대한 반응성을 측정할 수 있으며, 이에 따라 활성산소 타겟 단백질을 스크리닝할 수 있다.
One-Pot Syntheses of Dissymmetric Diamides Based on the Chemistry of Cyclic Monothioanhydrides. Scope and Limitations and Application to the Synthesis of Glycodipeptides
作者:David Crich、Kaname Sasaki、Md Yeajur Rahaman、Albert A. Bowers
DOI:10.1021/jo900532e
日期:2009.5.15
protection of alcohols in the various reaction components. Reaction of N-benzyloxycarbonyl-l-aspartic monothioanhydride with unprotectedglycosyl amines, followed by capture of the thioacid intermediate with N-sulfonyl aminoacid derivatives results in a three-component convergent synthesis of glycosylated peptides.
Thiomaleic Anhydride: A Convenient Building Block for the Synthesis of α-Substituted γ- and δ-Lactones through Free-Radical Addition, Nucleophilic Ring Opening, and Subsequent Thiocarboxylate Manipulation
作者:David Crich、Md. Yeajur Rahaman
DOI:10.1021/jo901219k
日期:2009.9.4
carbonates and carbamates undergo clean free-radical addition to thiomaleic anhydride to give substituted thiosuccinic anhydrides in high yield on treatment with tris(trimethylsilyl)silane and a radical initiator. After removal of the tert-butyloxycarbonyl group, cyclization then affords lactones or lactams substituted in the α-position by a thiocarboxylic acid residue. This group is converted to amides through
THIOL MEDIATED/ACTIVATED PRODRUGS OF SULFUR DIOXIDE (SO2) HAVING ANTI-BACTERIAL ACTIVITY
申请人:INDIAN INSTITUTE OF SCIENCE EDUCATION AN
公开号:US20140121211A1
公开(公告)日:2014-05-01
Disclosed herein are thiol mediated/activated prodrugs of SO
2
, particularly 2,4-dinitrophenylsulfonamide analogues, having Formula-I or pharmaceutically acceptable salts thereof exhibiting tunable release profiles of SO
2
with significant therapeutic efficacy against bacterial infections. Further, the present invention provides pharmaceutical compositions comprising compound of Formula I or pharmaceutically acceptable salts thereof, along with pharmaceutically acceptable carriers/excipients.
Dihydro-3-(triphenylphosphoranylidene)-2,5-thiophendione: a convenient synthon for the preparation of substituted 1,4-thiazepin-5-ones and piperidinones via the intermediacy of thioacids
作者:David Crich、Md. Yeajur Rahaman
DOI:10.1016/j.tet.2010.04.002
日期:2010.8
Reaction of thiomaleic anhydride with triphenylphosphine gives the title compound, which undergoes reaction with a variety of aldehydes to give a range of alkylidene thiomaleic anhydrides (substituted monothioitaconic anhydrides). Subsequent treatment with tert-butoxycarbonylamino-substituted thiols, or under radical conditions with tert-butoxycarbonylamino-substituted alkyl halides results in a series of substituted monothiomaleic anhydrides, that on exposure to trifluoroacetic acid and then base lead to thiocarboxyl substituted 1,4-thiazepin-5-ones and piperidinones, respectively, that are ultimately trapped by reaction with 2,4-dinitrobenzenesulfonamides to give the corresponding amides. (C) 2010 Elsevier Ltd. All rights reserved.