A rhodium-catalyzed carbonylative transformation of alkyl halides under low pressure of CO has been developed. This robust catalyst system allows using phenols as the carbonylative coupling partner and, meanwhile, exhibits high functional group tolerance and good chemoselectivity. Substrates even with a large steric hindrance group or multiple reaction sites can be selectively converted into the desired
Catalyst components for the polymerization of olefins
申请人:Basell Poliolefine Italia S.r.l.
公开号:EP2803678A1
公开(公告)日:2014-11-19
A solid catalyst component for the polymerization of olefins comprising Mg, Ti, Cl and at least an electron donor compound which is the reaction product obtained by bringing into contact a Mg compound and a Ti compound having at least a Ti-halogen bond with an electron donor selected from specific diphenol derivatives.
Commercially available porcine pancreatic lipase can conveniently be utilized for a highly enantioselective hydrolysis of valeric acid diester of racemic 1,1′-binaphthyl-2,2′-diol to give the (S)-diol (95% ee at 46% conversion).
An efficient microbial resolution of 2,2′-dihydroxy-1,1′-binathyl has been achieved by exposing the corresponding dibutyrate to Bacillus sp; the importance of the size of the ester group for hydrolysis rate and selectivity is emphasized.
CATALYST COMPONENTS FOR THE POLYMERIZATION OF OLEFINS
申请人:BASELL POLIOLEFINE ITALIA S.R.L.
公开号:US20160115261A1
公开(公告)日:2016-04-28
A solid catalyst component for the polymerization of olefins comprising Mg, Ti, Cl and at least an electron donor compound which is the reaction product obtained by bringing into contact a Mg compound and a Ti compound having at least a Ti-halogen bond with an electron donor selected from specific diphenol derivatives.