Catalytic enantioselective allylation at the activated benzylic position of prochiral aryl cyano esters: access to quaternary stereogenic centers
摘要:
Palladium catalyzed asymmetric allylic alkylation of prochiral aryl cyano esters has been carried out in the presence of various chiral ligands. The base and additives have been varied and allowed to produce the allyl derivative presenting a highly functionalized quaternary stereogenic center. The chiral pocket ligands of Trost appears the most appropriate to produce the desired chiral derivative. (C) 2005 Elsevier Ltd. All rights reserved.
Construction of quaternary carbon stereocentres: catalytic enantioselective allylation assisted by a bimetallic catalytic system
摘要:
The asymmetric allylic alkylation of prochiral aryl cyano esters has been carried out in the presence of a bi-component catalytic system containing a palladium and a rhodium complex modified by phosphorus containing chiral auxiliaries. The allyl derivatives were isolated in up to 63% ee. The chiral pocket ligands of Trost appear the most appropriate to produce the desired chiral derivatives. (c) 2005 Elsevier Ltd. All rights reserved.
Palladium catalyzed asymmetric allylic alkylation of prochiral aryl cyano esters has been carried out in the presence of various chiral ligands. The base and additives have been varied and allowed to produce the allyl derivative presenting a highly functionalized quaternary stereogenic center. The chiral pocket ligands of Trost appears the most appropriate to produce the desired chiral derivative. (C) 2005 Elsevier Ltd. All rights reserved.
Construction of quaternary carbon stereocentres: catalytic enantioselective allylation assisted by a bimetallic catalytic system
The asymmetric allylic alkylation of prochiral aryl cyano esters has been carried out in the presence of a bi-component catalytic system containing a palladium and a rhodium complex modified by phosphorus containing chiral auxiliaries. The allyl derivatives were isolated in up to 63% ee. The chiral pocket ligands of Trost appear the most appropriate to produce the desired chiral derivatives. (c) 2005 Elsevier Ltd. All rights reserved.