An enantioselective Brønsted acid catalyzed enamine Mannich reaction
作者:A. Louise Tillman、Darren J. Dixon
DOI:10.1039/b616143j
日期:——
An enantioselective Bronsted acid catalyzed Mannich reaction between acetophenone derived enamines and N-Boc imines has been developed. Simple diol (S)-H(8)-BINOL has been identified as the optimal catalyst, to afford versatile beta-amino aryl ketones in good yield and enantiomeric excess.
3,3′-dinitro-octahydrobinaphthol: A new chiral ligand for metal-catalyzed enantioselective reactions
作者:Manfred T Reetz、Claudia Merk、Guido Naberfeld、Joachim Rudolph、Nils Griebenow、Richard Goddard
DOI:10.1016/s0040-4039(97)01149-0
日期:1997.7
Starting from R-configurated binaphthol the R-form of the title compound was readily prepared in two steps and characterized by X-ray structural analysis. It was used as the chiral ligand in the Ti-catalyzed asymmetric oxidation of methyl-p-tolysulfide, the S-enantiomeric form of the sulfoxide being formed preferentially (ee = 86%). (C) 1997 Elsevier Science Ltd.