申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0345847A1
公开(公告)日:1989-12-13
Polymers of carbon monoxide and one or more olefinically unsaturated compounds are prepared by contacting with a catalyst composition comprising a Group VIII metal and a compound of the general formula R¹M¹-R-M²R² wherein M¹ and M² are chosen from sulphur, selenium and tellurium, R¹ and R² represent optionally polar-substituted hydrocarbyl groups and R represents a bivalent bridging group containing at least two carbon atoms in the bridge.
A facile and selective method for the title transformation is described. The two-phase oxidation of bis-sulfides with hydrogen peroxide catalyzed by vanadium complex of chiral Schiff base leads to the corresponding chiral mono- and bis-sulfoxides. In the case of 1,2-bis(arylthio)ethanes the respective optically active bis-sulfoxides are formed in up to over 95% e.e. (C) 1999 Elsevier Science Ltd. All rights reserved.
WADA, MASANORI;TENMA, KEISI;KAJIHARA, KAZUHISA;HIRATA, KUMIKO;ERABI, TATS+, CHEM. EXPRESS, 4,(1989) N, C. 109-111