Sulfonamides have been prepared in high yields by the reactions of N-silylamines with sulfonyl chlorides and fluorides. In a competition experiment, the sulfonyl chlorides were found to be far more reactive than sulfonyl fluorides. The chemistry may be used to prepare aliphatic, aromatic, tertiary, secondary, and primary sulfonamides. It may also be done in the absence of solvent and the byproduct trimethylsilyl chloride recovered in good yield. Primary sulfonamides were synthesized from the sulfonyl chloride with aminotriphenyl silane (Ph3SiNH2), a conversion demonstrated with the synthesis of the carbonic anhydrase inhibitor, acetazolamide. (C) 2013 Elsevier Ltd. All rights reserved.
A mild and efficient procedure has been developed for the first time under biomimetic conditions for the monosulfonylation of various amines and aminoacids catalyzed by β-cyclodextrin in water at room temperature to afford the corresponding sulfonamides in high yields.
PTAB mediated open air synthesis of sulfonamides, thiosulfonates and symmetrical disulfanes
作者:Debayan Sarkar、Manoj Kumar Ghosh、Nilendri Rout
DOI:10.1016/j.tetlet.2018.05.017
日期:2018.6
A facile methodology has been described which has successfully simplified the generation of sulfonamides, thiosulfonates and symmetric disulfanes. This “trio” of reactions occur in an open air metal free atmosphere and has also been scaled up to grams making it suitable for commercialization. The reactions also have been successfully carried out with asymmetric variants, thus contributing to the chiral
A mild and efficient procedure has been developed for the monosulfonylation of various amines using mesyl or tosyl chlorides in water at room temperature to afford the corresponding sulfonamides in high yields.
Copper-catalyzed electrophilic amination of sodium sulfinates at room temperature
作者:Haibo Zhu、Yajing Shen、Qinyue Deng、Tao Tu
DOI:10.1039/c5cc06069a
日期:——
By using O-benzoyl hydroxylamines as amine source, the first convenient copper-catalyzed electrophilic amination of sodium sulfinates has been realized. Even with 2 mol% catalyst loading, the protocol provided an efficient...
A series of N-substituted morpholines 2–20 was synthesised by reacting various acid chlorides and alkyl halides with morpholine (1). All of the synthesised compounds 2–20 were screened for their leishmanicidal effects using amphotericin B (IC50 = 0.24 µg L−1) and pentamidine (IC50 = 2.56 µg mL−1) as standards and a structure–activityrelationship (SAR) study was established. The compounds 2 (IC50 =