One-pot synthesis of sulfonamides from methyl sulfinates using ultrasound
摘要:
Room temperature ultrasonic irradiation of neat mixtures of methyl sulfinates and primary or secondary amines (1.5 equiv) produced sulfinamides, which on m-CPBA oxidation (in dichloromethane) were converted into the corresponding sulfonamides. The two steps can be accomplished in one pot, in good overall yields, when using secondary amines, but primary amines give better sulfonamide yields when the peracid oxidation is effected on the purified sulfinamide. This constitutes a mild, efficient, and potentially scalable route to sulfonamides, which obviates the use of water sensitive, often lachrymatory sulfonyl chlorides and large reagent excesses. (C) 2011 Elsevier Ltd. All rights reserved.
Iodine-catalyzed sulfonylation of sulfonyl hydrazides with <i>tert</i>-amines: a green and efficient protocol for the synthesis of sulfonamides
作者:Jinyang Chen、Xiaoran Han、Lan Mei、Jinchuan Liu、Kui Du、Tuanwu Cao、Qiang Li
DOI:10.1039/c9ra07361b
日期:——
This study provides a direct, sustainable and eco-friendly method for the synthesis of various sulfonamides via the sulfonylation of sulfonyl hydrazides with tert-amines. The method utilizes sulfonyl hydrazides to oxidize and couple with tertiary amines through selective cleavage of C–N bonds. In this reaction, molecular iodine was used as the catalyst and t-butyl hydroperoxide was used as the oxidant
TBAI-catalyzed selective synthesis of sulfonamides and β-aryl sulfonyl enamines: coupling of arenesulfonyl chlorides and sodium sulfinates with <i>tert</i>-amines
A simple, practical and metal-free method has been developed for the synthesis of sulfonamides and β-arylsulfonyl enamines via the selective cleavage of C–N and C–H bonds through the iodine-catalyzed oxidation of arenesulfonyl chlorides and sodiumsulfinates with tert-amines. The method uses commercially available inexpensive catalysts and oxidants, and has a wide substrate scope and operational simplicity
作者:Diogo L. Poeira、João Macara、Hélio Faustino、Jaime A. S. Coelho、Pedro M. P. Gois、M. Manuel B. Marques
DOI:10.1002/ejoc.201900259
日期:2019.4.24
A clean and mild transfer of sulfonyl groups to amines and anilines, mediated by a hypervalentiodinereagent is described. With this reaction a total of 25 sulfonamides was synthesised in up to 99 % yield, even on gram scale. The reaction mechanism was investigated by ESI‐MS and DFT calculations.
PROLINE SULFONAMIDE DERIVATIVES AS OREXIN RECEPTOR ANTAGONISTS
申请人:Boss Christoph
公开号:US20130150424A1
公开(公告)日:2013-06-13
The present invention relates to (S)-proline sulfonamide compounds of formula (I)
wherein R
1
and R
2
are as described in the description, or pharmaceutically acceptable salts thereof, for use in the prevention or treatment of diseases or disorders related to the orexin system. The present invention also relates to the use of (S)-proline sulfonamide compounds of formula (II) as pharmaceuticals, to pharmaceutical compositions comprising compounds of formula (II), and especially their use in the prevention or treatment of diseases or disorders related to the orexin system.
Inhibitors of the 11-beta-hydroxysteroid dehydrogenase type 1 enzyme
申请人:Patel R. Jyoti
公开号:US20060281773A1
公开(公告)日:2006-12-14
The present invention relates to compounds which are inhibitors of the 11-beta-hydroxysteroid dehydrogenase Type 1 enzyme. The present invention further relates to the use of inhibitors of 11-beta-hydroxysteroid dehydrogenase Type 1 enzyme for the treatment of non-insulin dependent type 2 diabetes, insulin resistance, obesity, lipid disorders, metabolic syndrome and other diseases and conditions that are mediated by excessive glucocorticoid action.