Menthyloxycarbonyl phosphonium chlorides: new derivatives for determining the enantiomeric excess of chiral tertiary phosphines
摘要:
The direct alkoxycarbonylation of tertiary phosphines with alkyl chloroformates has been examined and the products characterised by NMR and X-ray crystallographic analysis. The derivatisation of representative chiral tertiary phosphines with enantiopure menthyl chloroformate allows the determination of the enantiomeric excess of scalemic mixtures by P-31 NMR spectroscopic analysis. (C) 2013 Elsevier Ltd. All rights reserved.