Catalytic asymmetric arylation of N-substituted 2-pyrrolines with aryl triflates
作者:Fumiyuki Ozawa、Tamio Hayashi
DOI:10.1016/0022-328x(92)83236-b
日期:1992.4
Catalyticasymmetricarylation of 1-(alkoxycarbonyl-2-pyrrolines (4) with aryltriflates (1) in benzene in the presence of a base and a palladium catalyst, prepared in situ by mixing Pd(OAc)2 and (R)-BINAP, gives optically active (R-1-(alkoxycarbonyl-5-aryl-2-pyrrolines (5) of up to 83% ee, together with the regioisomers 1-(alkoxycarbonyl)-5-aryl-3-pyrrolines (6).
Highly Regio- and Enantioselective Heck Reaction of <i>N</i>-Methoxycarbonyl-2-pyrroline with Planar Chiral Diphosphine-oxazoline Ferrocenyl Ligands
作者:Tao Tu、Xue-Long Hou、Li-Xin Dai
DOI:10.1021/ol035308k
日期:2003.10.1
A series of planar chiral diphosphine-oxazoline ferrocene ligands were effectively applied in the asymmetric arylation of N-methoxycarbonyl-2-pyrroline, and up to 99% ee was observed for the product 3. The regioselectivity of this reaction was strongly affected by the different precursors of the palladium species and the polarity of the solvent.