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Monomeric Cu(II) Complex Containing Chiral Phase‐transfer Catalyst as Ligand and Its Asymmetrically Catalytic Reaction
Author(s) -
QU ZhiRong,
XIONG RenGen
Publication year - 2008
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200890047
Subject(s) - chemistry , catalysis , copper , monomer , ligand (biochemistry) , quinoline , polymer chemistry , medicinal chemistry , chloride , chiral ligand , alkylation , enantioselective synthesis , organic chemistry , biochemistry , receptor , polymer
The thermal treatment of CuCl 2 with N ‐(4′‐vinylbenzyl)cinchonidinium chloride ( L1 ) afforded a monomeric discrete homochiral copper(II) complex N ‐4′‐(vinylbenzyl)cinchonidinium trichlorocoprate(II) ( 1 ). Their applications to the enantioselectively catalytic alkylation reaction of N ‐(diphenylmethylidene)glycine tert ‐butyl ester ( 3 ) show that the higher ee value observed in catalyst 1 than that in the corresponding free ligand L1 is probably due to the rigidity enhancement after the coordination of N atom of quinoline ring to the copper ion.