Chiral P,O-ligands derived from N,O-phenylene prolinols for palladium-catalyzed asymmetric allylic alkylation
摘要:
CuI-catalyzed N,O-arylation of (S)-prolinols and 1-bromo-2-iodobenzene afforded cyclic N,O-(1,2-phenylene)prolinols, and subsequent ortho-lithiation and phosphination provided a new type of chiral P,O-ligands. Their palladium-complex-catalyzed asymmetric allylic alkylation of dimethyl malonate with 1,3-diphenyl 2-propenyl acetate gave high yields and good enantioselectivities. (c) 2007 Elsevier Ltd. All rights reserved.
Preparation of N-phenyl-(S)-prolinol-derived P,N-ligands and their application in Pd-catalyzed asymmetric allylic alkylation
摘要:
Several NPN-type ligands bearing two chiral pyrrolidinyl groups derived from N-phenyl-(S)-prolinol were prepared by two synthetic methods. Their palladium-complex-catalyzed asymmetric allylic alkylation of malonates with 1,3-diphenyl 2-propenyl acetate delivered the products with good to high enantioselectivities (84-97% ee), including an optically active fluorine-containing compound. (c) 2006 Elsevier Ltd. All rights reserved.
Preparation of N-phenyl-(S)-prolinol-derived P,N-ligands and their application in Pd-catalyzed asymmetric allylic alkylation
作者:Biao Jiang、Zuo-Gang Huang、Ke-Jun Cheng
DOI:10.1016/j.tetasy.2006.03.010
日期:2006.3
Several NPN-type ligands bearing two chiral pyrrolidinyl groups derived from N-phenyl-(S)-prolinol were prepared by two synthetic methods. Their palladium-complex-catalyzed asymmetric allylic alkylation of malonates with 1,3-diphenyl 2-propenyl acetate delivered the products with good to high enantioselectivities (84-97% ee), including an optically active fluorine-containing compound. (c) 2006 Elsevier Ltd. All rights reserved.
Chiral P,O-ligands derived from N,O-phenylene prolinols for palladium-catalyzed asymmetric allylic alkylation
作者:Biao Jiang、Zuo-Gang Huang
DOI:10.1016/j.tetlet.2007.01.057
日期:2007.3
CuI-catalyzed N,O-arylation of (S)-prolinols and 1-bromo-2-iodobenzene afforded cyclic N,O-(1,2-phenylene)prolinols, and subsequent ortho-lithiation and phosphination provided a new type of chiral P,O-ligands. Their palladium-complex-catalyzed asymmetric allylic alkylation of dimethyl malonate with 1,3-diphenyl 2-propenyl acetate gave high yields and good enantioselectivities. (c) 2007 Elsevier Ltd. All rights reserved.