Preparation of Alkyl Dihydrogenphosphates with Monomeric Metaphosphate Anion Generated by Photochemical C–P Bond Cleavage of<i>p</i>-Nitrobenzylphosphonic Acid
a monomeric metaphosphate anion as an intermediate. The monomeric metaphosphate anions used in this reaction were generated by a photochemical C–P bondcleavage of the p-nitrobenzylphosphonate dianion. The photolysis of a 1:2 molar mixture of p-nitrobenzylphosphonic acid and 1,8-diazabicyclo[5.4.0]undec-7-ene (or 2,2,6,6-tetramethylpiperidine) in excess alcohol gave alkyl dihydrogenphosphate in fairly
Use of bis[2-(trialkylsilyl)ethyl]N,N-dialkylphosphoramidites for the synthesis of phosphate monoesters
作者:Kenneth C. Ross、Daniel L. Rathbone、William Thomson、Sally Freeman
DOI:10.1039/p19950000421
日期:——
Without isolation, these were oxidised to the corresponding phosphatetriesters 9a–h with m-chloroperoxybenzoic acid. Treatment of the triesters 9a–h with tetrabutylammonium fluoride removes only one 2-(trialkylsilyl)ethyl group to give the diesters 10a–h, whereas treatment with a solution of hydrofluoric acid in acetonitrile–water gives the phosphate monoesters 11a–e.
The mechanism of displacement of sulphur from adenosine 5′-[(S)α-thio-γ-benzyl] triphosphate
作者:Gordon Lowe、Graeme Semple
DOI:10.1039/c39880000377
日期:——
Adenosine5′-[(S)α-thio-γ-benzyl]triphosphate on treatment with cyanogen bromide in [18O]water gives [α-18O]- and [γ-18O]-adenosine 5′-[γ-benzyl]triphosphate in about equal amounts, the [α-18O] material being formed with retention of configuration at phosphorus providing support for a mechanism involving participation by the γ-phosphate group.