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Synthesis and spectral properties of 4-(O,O-dialkyl(diaryl)-thiophosphorylhydrazono)-2,3-dichloro(2-chloro-3-ethylthio)-2-butenoic acid alkyl esters

V. Konečný and Š. Kováč

Research Institute of Chemical Technology, CS-83106 Bratislava

 

Abstract: The synthesis of nine novel 4-(0,0-dialkyl(diaryl)thiophosphorylhy- drazono)-2,3-dichloro(2-chloro-3-ethylthio)-2-butenoic acid esters by the esterification of appropriate acids with alcohols and by the reaction of diazomethane or by the reaction of 3-formyl-2,3-dichloropropenoic acid methyl ester with 0,0-dialkylthiophosphorylhydrazine is described. It was found that by the esterification cyclic products 2-(0,0-dialkyl(diaryl)- thiophosphoryl)-4,5-dichloro-3-oxo-2H/-pyridazines were also formed. In­ frared, ultraviolet, and 1H NMR spectra of the prepared compounds are interpreted.

Full paper in Portable Document Format: 411a107.pdf

 

Chemical Papers 41 (1) 107–112 (1987)

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