The treatment of triphenylphosphine oxide with organometallic reagents leads to the substitution of up to three phenyl substituents with the incoming carbon nucleophile. The replacement of the phenyl/aryl group in tertiary diarylalkylphosphine oxides or even aryldialkylphosphine oxides was also observed. Naphthyl-substituted phosphine oxides undergo Michael-type addition at the naphthyl group when
SOLVOLYSIS OF PHOSPHONIUM COMPOUNDS CONTAINING A THIOPHENOXY GROUP LINKED TO PHOSPHORUS
作者:Gunnar Aksnes
DOI:10.1080/10426509608037953
日期:1996.8.1
Abstract A kinetic study of the solvolysis of six alkylphenyl thiophenoxyphosphonium chlorides in 50% water/methanol is reported. The rates of solvolysis, where thiophenol and phosphine oxides are formed, are little influenced by the substituents linked to phosphorus. The present findings are in sharp contrast to the 104 higher rate of the alkaline decomposition of tetraphenyl as compared to tialkylphenyl
First ever observation of the intermediate of phosphonium salt and ylide hydrolysis: P-hydroxytetraorganophosphorane
作者:Peter A. Byrne、Yannick Ortin、Declan G. Gilheany
DOI:10.1039/c4cc08644a
日期:——
long-postulated intermediate in phosphonium salt and ylidehydrolysis, has been observed and characterised by low temperature NMR, finally definitively establishing its involvement in these reactions. The results require modification of the previously accepted mechanism for ylidehydrolysis: P-hydroxytetraorganophosphorane is generated directly by 4-centre reaction of ylide with water.