Paper
SYNTHESIS OF 1-METHYL-1-(N-SUBSTITUTED CARBAMOYL- AND THIOCARBAMOYL-AMINO) ALKANEPHOSPHONIC ACIDS-DIETHYL ESTERS
Published Dec 1, 1993 · V. Lachkova, G. Petrov, A. Hussein
Phosphorus Sulfur and Silicon and The Related Elements
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Abstract
Abstract Diethylesters of 1-methyl-1-(N-substituted carbamoyl- or thiocarbamoyl-amino)-alkane-phosphonic acids are obtained by interaction of O,O-diethyl esters of 1-amino-1-methyl-alkanephosphonic acids and different isocyanates or isothiocyanates at room temperature. Cyclization of 1-methyl-I-(N-butylcarbamoyl-amino)-ethanephosphonic acid diethyl ester to 3-butyl-5,5,-dimethyl-2,4-dioxo-4-hydroxy-1,3,4-diazaphosphole is achieved.
Diethyl esters of 1-methyl-1-(N-substituted carbamoyl- or thiocarbamoyl-amino)-alkane-phosphonic acids can be synthesized and converted to 3-butyl-5,5,-dimethyl-2,4
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