A process for the manufacture of optically active phosphinamide
申请人:Centrum Badan Molekularnych I
Makromolekularnych Pan
公开号:EP2639237A1
公开(公告)日:2013-09-18
A process for the manufacture of optically active t-butyl-phenyl phosphinamide of Formula 1 according to the invention consists in that a racemic mixture of phosphinamide is treated with enantiomerically pure (+)-(S)-mandalic acid or enantiomerically pure (+)-(R)-2,2'-dihydroxy-1,1'-binaphthyl ((R)-BINOL) in organic solvents and the resulting crystals of the supramolecular complex whose breakdown enables the isolation of enantiomerically pure phosphinamide of Formula 1 are isolated. Optically pure phosphinamide 1 enriched with an enantiomer with an absolute configuration at the stereogenic phosphorus atom opposite with respect to the compounds used is obtained from mother liquors following an appropriate isolation procedure.
Preparation of bi- and tridentate doubly P-chiral diphosphine dioxide ligands for asymmetric catalysis
作者:William W.-L Lam、Richard K Haynes、Lam.-Lung Yeung、Eric W.-K Chan
DOI:10.1016/0040-4039(96)00953-7
日期:1996.7
Syntheses of bi- and tridentatedoublyP-chiraldiphosphinedioxides through reaction of the individual enantiomers of optically pure lithiated tert-butylphenylphosphine oxide with different bifunctional electrophiles are described.
The addition of various Grignardreagents to P-t-butyl-P-phenyl-N-phosphinoyl benzaldimine provides a stereoselective method for the synthesis of chiral phosphinoylamines.