The preparation and reactions of chiral phosphorous acid diamides
作者:Kevin J. Koeller、Christopher D. Spilling
DOI:10.1016/0040-4039(91)80151-u
日期:1991.10
Chiral phosphorousacid diamides were prepared by condensation of N,N′-disubstituted C2 diamines with PCl3 followed by an equivalent of water. Deprotonation of these acids with n-butyl lithium or LDA gave the lithium salt which reacted smoothly with alkyl halides to give the substituted phosphonamides in good yield.
Synthetic and structural chemistry of enantiomerically pure 1-phenyl-2-carboxyethylphosphonic acid and its derivativesElectronic supplementary information (ESI) available: Tables S1–6. See http://www.rsc.org/suppdata/nj/b1/b111244a/
作者:Stuart Gardner、Majid Motevalli、Kirtida Shastri、Alice C. Sullivan、Peter B. Wyatt
DOI:10.1039/b111244a
日期:2002.4.2
(S)-(+)-1-Phenyl-2-carboxyethylphosphonic acid, (S)-1, has been prepared via diastereoselective alkylation of (3aR,7aR)-octahydro-1,2,3-tribenzyl-1,3,2-benzodiazaphosphole 2-oxide (3) using tert-butyl bromoacetate; the X-ray crystal structure of the intermediate alkylation product is described. The X-ray structure of a single crystal of (R)-1, obtained by crystallisation of rac-1 is reported. The structure