Auf der Suche nach wirksamen Pflanzenschutzmitteln wird versucht, aus O,O′‐Dialkyl‐cyanmethylen‐phosphonat (I), Alkyl‐ oder Arylisothiocyanat (II) und Schwefel unter Zugabe von Triethylamin die im Titel genannten, in 3‐Stellung alkylierten bzw. arylierten Verbindungen (III) zu erhalten.
The title compounds (IV), which are unstable above 50°C, are prepared by condensation reaction of the isothiocyanates (I) with the cyanoacetate (IIa) or the malonate (IIb), followed by S‐alkylation with the alkyl halides (III).
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