Palladium-Catalyzed Direct Arylation of Methyl Sulfoxides with Aryl Halides
作者:Tiezheng Jia、Ana Bellomo、Kawtar EL Baina、Spencer D. Dreher、Patrick J. Walsh
DOI:10.1021/ja4009776
日期:2013.3.13
The palladium-catalyzed α-arylation of unactivated sulfoxides has been developed. The weakly acidic α-protons of sulfoxides are reversibly deprotonated by LiOtBu, and a palladium phosphine complex facilitates the arylation. A variety of aryl methyl sulfoxides were coupled with arylbromides. More challenging coupling partners, such as alkyl methyl sulfoxides (including dimethyl sulfoxide) and aryl chlorides
Palladium-Catalyzed Reaction of Boronic Acids with Chiral and Racemic α-Bromo Sulfoxides
作者:Nuria Rodríguez、Ana Cuenca、Carmen Ramírez de Arellano、Mercedes Medio-Simón、Denissa Peine、Gregorio Asensio
DOI:10.1021/jo0487552
日期:2004.11.1
Palladium-catalyzed cross-coupling reactions of racemic α-bromo sulfoxides with boronic acids are carried out in either aqueous or nonaqueous medium with formation of a new C sp3−C sp2 bond. The arylation of chiral α-bromo sulfoxides occurs without racemization. The cross-coupling reaction is general and gives high yields with arylboronic acids substituted with either donor or acceptor groups but gives
Unprecedented Palladium-Catalyzed Cross-Coupling Reaction of α-Bromo Sulfoxides with Boronic Acids
作者:Nuria Rodríguez、Ana Cuenca、Carmen Ramírez de Arellano、Mercedes Medio-Simón、Gregorio Asensio
DOI:10.1021/ol034358m
日期:2003.5.1
[reaction: see text] A new Suzuki-type palladium-catalyzed reaction of boronic acids with alpha-bromo sulfoxides has been developed using a protocol similar to the well-documented reaction of boronic acids with aryl halides. Both cross-coupling and homocoupling processes were observed. The best yields in cross-coupling products were obtained when the presence of oxygen was carefully excluded using
Copper-Catalyzed Sulfinyl Cross-Coupling Reaction of Sulfinamides
作者:Mengting Kou、Ziqiang Wei、Zhen Li、Bin Xu
DOI:10.1021/acs.orglett.2c03414
日期:2022.11.25
A copper-catalyzed sulfinyl cross-coupling reaction of sulfinamides with aldehyde-derived N-tosylhydrazones is described. This approach enables facile access for the construction of structurally diverse sulfoxides via novel and efficient S–N/S–Cbond interconversions, features broad substrate scope, and accommodates various functional groups as well as pharmacophores. Moreover, the given sulfinyl cross-coupling
A thermoplastic resin composition comprising:
a transparent aromatic thermoplastic resin (a) and
a copolyester resin (b) comprising at least two kinds of dicarboxylic acid moieties and one kind of diol moiety, 1 to 50 mol % of the dicarboxylic acid moieties being a naphthalenedicarboxylic acid moiety,
the ratio of (a) to the combined amount of (a) and (b) being 55 to 99.99% by weight, and the ratio of (b) being 0.01 to 45% by weight.