By using formamides as amine sources, a novel and efficient KO-t-Bu mediated amination of sodium sulfinates has been developed. The reaction utilizes readily available starting materials under metal-free conditions, thus providing an alternative and attractive route to sulfonamides.
A new synthesis of sulfonamides has been developed via an iodine-catalyzed sulfonylation of amines with arylsulfonyl hydrazides. This metal-free strategy employs readily accessible and easy to handle starting materials, catalysts and oxidants, and can be easily conducted undermildconditions, providing a convenient access to a wide range of sulfonamides in moderate to excellent yields within a short
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...
Combining Organometallic Reagents, the Sulfur Dioxide Surrogate DABSO, and Amines: A One-Pot Preparation of Sulfonamides, Amenable to Array Synthesis
作者:Alex S. Deeming、Claire J. Russell、Michael C. Willis
DOI:10.1002/anie.201409283
日期:2015.1.19
describe a method for the synthesis of sulfonamides through the combination of an organometallicreagent, a sulfurdioxide equivalent, and an aqueous solution of an amine under oxidative conditions (bleach). This simple reaction protocol avoids the need to employ sulfonyl chloride substrates, thus removing the limitation imposed by the commercial availability of these reagents. The resultant method allows
申请人:TEIJIN LIMITED, MICROBIAL CHEMISTRY RESEARCH FOUNDATION
公开号:US20030186976A1
公开(公告)日:2003-10-02
There is provided benzofuryl-&agr;-pyrone derivative represented by the following structural formula (I):
1
wherein R
1
represents a hydrogen atom or an alkyl group of 1 to 5 carbons;
R
2
represents hydrogen, —CO—R
5
or —SO
2
R
6
;
R
3
represents hydrogen, an alkyl group of 1 to 5 carbons, etc.; and
R
4
is a substituent attached to the 4-carbon, 5-carbon, 6-carbon or 7 carbon of the benzofuran ring; and their salts. The compounds are useful as therapeutic agent for hypertriglyceridemia, lipid metabolism enhancers, or prophylactic and/or therapeutic agents for arteriosclerosis.