We describe here the coupling to transform aryl phosphine derivatives by the cleavage of unactivated C(aryl)–P bonds with chromium catalysis, allowing us to achieve the reaction with alkyl bromides and arylmagnesium reagentsundermildconditions. Mechanistic studies indicate that catalytic cleavage of unactivated C(aryl)–P bonds is due to the in situ formed reactive Cr, followed by transmetalation
[EN] PROCESS FOR THE PRODUCTION OF LACTAMS<br/>[FR] PROCEDE DE PRODUCTION DE LACTAMES
申请人:DAVY PROCESS TECHN LTD
公开号:WO2005051907A1
公开(公告)日:2005-06-09
A homogeneous process for the hydrogenation of dicarboxylic acid and/or derivative thereof with an amine in the presence of a catalyst comprising: (a) ruthenium or osmium; and (b) an organic phosphine; and wherein the hydrogenation is carried out in the presence of water.