[EN] PROCESSES FOR THE STEREOSELECTIVE PREPARATION OF P-CHIRAL FOUR -COORDINATED PHOSPHORUS BORANE COMPOUNDS AND P-CHIRAL THREE-COORDINATED PHOSPHORUS COMPOUNDS<br/>[FR] PROCÉDÉS POUR LA PRÉPARATION STÉRÉOSÉLECTIVE DE COMPOSÉS DE BORANE DE PHOSPHORE À QUATRE COORDINATIONS P-CHIRAUX ET DE COMPOSÉS PHOSPHORÉS À TROIS COORDINATIONS P CHIRAUX
申请人:UNIV DUBLIN
公开号:WO2012113889A1
公开(公告)日:2012-08-30
Processes for the stereoselective preparation of P-chiral four-coordinated phosphorus borane compounds and P-chiral three-coordinated phosphorus compounds.
Identification of a key intermediate in the asymmetric Appel process: one pot stereoselective synthesis of P-stereogenic phosphines and phosphine boranes from racemic phosphine oxides
作者:Kamalraj V. Rajendran、Declan G. Gilheany
DOI:10.1039/c2cc34136k
日期:——
racemic phosphine oxides with oxalyl chloride and chiral non-racemic alcohol generates the same ratios of diastereomeric alkoxyphosphonium salts obtained in the corresponding asymmetric Appel process, strongly implicating the intermediate chlorophosphonium salt in the stereoselecting step. Subsequent reduction allows a novel synthesis of enantioenriched P-stereogenic phosphines-phosphine boranes.
One-pot synthesis of chiral phosphonous esters, conversion into asymmetric phosphines
作者:W. Chodkiewicz
DOI:10.1016/0022-328x(84)80557-4
日期:1984.10
Bulky phenols react with phosphonous chloroesters of cinchonine, or cinchonidine, to yield, quantitatively, the corresponding phosphonous esters of high diastereomeric purity. The aryloxy group can be specifically replaced by reaction with aromatic Grignard reagents and the resulting phosphinous esters can be converted into phosphines retaining the high enantiomeric purity.