Efficient Desulfinative Cross-Coupling of Heteroaromatic Sulfinates with Aryl Triflate in Environmentally Friendly Protic Solvents
摘要:
Aryl-substituted heteroaromatics were synthesized via desulfinative cross-coupling reactions using aryl triflate and heteroaromatic sulfinate coupling partners. This method uses synthetically versatile aryl triflates to access aryl-substituted heteroaromatics in good yields employing aqueous and alcoholic media without the use of base, additives or co-catalysts.
Pyrrolopyrrolone derivatives as inhibitors of neutrophil elastase
申请人:Glaxo Wellcome Inc.
公开号:US05994344A1
公开(公告)日:1999-11-30
There are described according to the invention compounds of formula (I) (relative stereochemistry indicated), wherein R.sub.1, R.sub.2, R.sub.3 and X are as defined in the specification, together with processes for preparing them, compositions containing them and their use as pharmaceuticals. Compounds of formula (I) are indicated inter alia for the treatment of chronic bronchitis.
Palladium-Catalyzed Intermolecular Desulfinylative Cross-Coupling of Heteroaromatic Sulfinates
作者:Stéphane Sévigny、Pat Forgione
DOI:10.1002/chem.201204201
日期:2013.2.11
in simplicity: An efficient and environmentally benign palladium‐catalyzed protocol has been developed using a sulfinate as a nucleophilic coupling partner. The sulfinate position is arylated chemoselectively in very good yields. The bench‐stable, non‐hygroscopic heteroaromaticsulfinate salts rapidly undergo cross‐coupling without the need of a co‐catalyst, base, or additives (see scheme; mw=microwave)
Efficient desulfinylative cross-coupling of thiophene and furan sulfinates with aryl bromides in aqueous media
作者:Stéphane Sévigny、Pat Forgione
DOI:10.1039/c3nj41153b
日期:——
This letter describes the development of an environmentally benign palladium-catalyzedcross-coupling reaction using heteroaromaticsulfinates as nucleophilic coupling partners in aqueous media. This method accesses aryl-substituted heteroaromatics in very good yields chemoselectively without the need for base, additives or co-catalysts.
The present invention relates to novel hydantoin derivatives, processes for producing said hydantoin derivatives, pharmaceutical compositions containing at least one of said hydantoin derivatives as aldose reductase inhibitors and novel intermediate compounds in the synthesis of said hydantoin derivatives. The present invention is based on the selection of a hydantoin which is bonded by a sulfonyl group to various substituents at the 1-position of the hydantoin skeleton. The compounds of the present invention have a strong inhibitory activity against aldose reductase. These compounds are extremely useful for the treatment and/or prevention of various forms of diabetic complications based on the accumulation of polyol metabolites.