A convenient synthesis of sulfonamidesand sulfonylazidesfromthiols is described. In situ preparation of sulfonyl chlorides fromthiols is accomplished by oxidation with N-chlorosuccinimide (NCS), tetrabutylammonium chloride, and water. The sulfonyl chlorides are then further allowed to react with excess amine or sodium azide in the same reaction vessel.
Synthesis of α-Fluorosulfonamides by Electrophilic Fluorination
作者:Bryan Hill、Yong Liu、Scott D. Taylor
DOI:10.1021/ol048249z
日期:2004.11.1
alpha-Fluorosulfonamides were prepared by electrophilic fluorination of tertiary sulfonamides using N-fluorobenzenesulfonimide as fluorinating agent and utilizing the dimethoxybenzyl group (DMB) as a new sulfonamide protecting group. Removal of the DMB group with TFA/CH2Cl2 gave primary and secondary alpha-fluorosulfonamides.
Convenient One-Pot Synthesis of Sulfonamides from Thiols and Disulfides Using 1,3-Dichloro-5,5-dimethylhydantoin (DCH)
作者:Hojat Veisi
DOI:10.5012/bkcs.2012.33.2.383
日期:2012.2.20
A convenient synthesis of sulfonamidesfromthiols and disulfides is described. In situ preparation of sulfonyl chlorides fromthiols is accomplished by oxidation with 1,3-dichloro-5,5-dimethylhydantoin (DCH) under Nbenzyl-trimethylammonium chloride and water. The sulfonyl chlorides are then further allowed to react with excess amine in the same reaction vessel.
Synthesis of α-fluoro- and α,α-difluoro-benzenemethanesulfonamides: new inhibitors of carbonic anhydrase
作者:G. Michael Blackburn、Hasan Türkmen
DOI:10.1039/b417327a
日期:——
Direct fluorination of arenemethanesulfonamide anions under mild conditions and in high yield has been accomplished using N-fluorobisbenzenesulfonimide, NFSi, on carbanions of N-tert-butyl- and N-bis-(4-methoxyphenyl-methyl)-benzenemethanesulfonamides giving novel α-fluoro- and α,α-difluoro-benzenemethanesulfonamides respectively: IC50 and pKa data show that α-halogenation enhances sulfonamide acidity incrementally and correlates well with increased carbonic anhydrase inhibition, while lipophilicity is also enhanced.