Microwave-Assisted Copper-Catalyzed Preparation of Diaryl Chalcogenides
作者:Sangit Kumar、Lars Engman
DOI:10.1021/jo060690a
日期:2006.7.1
Diaryl chalcogenide synthesis employing diaryl dichalcogenides and aryl halides as starting materials in the presence of excess magnesium and a catalytic amount of CuI/bipyridyl is significantly improved by microwave heating. Reaction times can be reduced from 2 to 3 days to 6−8 h. Both arylbromides and aryl chlorides can be used as substrates in the substitution reaction. The procedure is useful
Facile Preparation of Aryl Sulfides Using Palladium Catalysis under Mild Conditions
作者:Tatsuo Okauchi、Kouji Kuramoto、Mitsuru Kitamura
DOI:10.1055/s-0030-1259012
日期:2010.12
A convenient method for C-S cross-coupling of aryl bromides with various thiols has been developed that involves the use of a 1,1'-bis(diphenylphosphino)ferrocene (DPPF)-ligated palladium complex with N,N-diisopropylethylamine (DIPEA) as the base. This coupling is tolerant of a wide range of functional groups, including hydroxy, amino, cyano, nitro, formyl, and carboxyl groups.
BISPHENOL COMPOSITION AND METHOD FOR PRODUCING SAME, AND POLYCARBONATE RESIN AND METHOD FOR PRODUCING SAME
申请人:Mitsubishi Chemical Corporation
公开号:EP3674281A1
公开(公告)日:2020-07-01
Provided is a thermally stable bisphenol composition whose increase in the Hazen color number is suppressed even under higher temperature conditions. A bisphenol composition including an aryl alkyl sulfide or a dialkyl disulfide at 0.1 ppb by mass to 1% by mass with respect to a bisphenol. A bisphenol composition including an aryl alkyl sulfide or a dialkyl disulfide at a predetermined ratio is thermally stable in terms of the Hazen color number, and shows no coloring problem under high temperature conditions. By using such a bisphenol composition, a polycarbonate resin having an excellent color tone can be produced.
[EN] METHOD FOR PRODUCING BISPHENOL AND METHOD FOR PRODUCING POLYCARBONATE RESIN<br/>[FR] PROCÉDÉ DE PRODUCTION DE BISPHÉNOL ET PROCÉDÉ DE PRODUCTION DE RÉSINE DE POLYCARBONATE<br/>[JA] ビスフェノールの製造方法、及びポリカーボネート樹脂の製造方法