Synthesis of novel 2,5-dihydro-1,5,2-diazaphosphinines from primary enamine phosphonates and from alkyl phosphonates |
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Authors: | Francisco Palacios Ana M Ochoa de Retana Rafael López de Munain José M Ezpeleta |
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Institution: | a Departamento de Química Orgánica I, Facultad de Farmacia, Universidad del País Vasco, Apartado 450, 01080 Vitoria, Spain b Departamento de Física Aplicada, Facultad de Farmacia, Universidad del País Vasco, Apartado 450, 01080 Vitoria, Spain |
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Abstract: | A simple method for the preparation of phosphorus-containing pyrimidine analogues such as 2,5-dihydro-2-ethoxy-1,5,2-diazaphosphinine 2-oxides 9, 12-15 and adducts 3, 10 is described. Dihydrophosphinines 9, 12-15 are prepared from primary enamine phosphonates and nitriles or from phosphonates and nitriles in the presence of base, while highly stable hydrogen-bonded amine-dihydro-diazaphosphinine adducts 3, 10 are obtained by the addition of amine to dihydrophosphinines 9 or by reaction of alkylphosphonates with nitriles in the presence of LDA. |
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Keywords: | 1 5 2-Diazaphosphinine Enamine Phosphonate Fluorinated compounds |
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