1476607 Organophosphorusisoureas BAYER AG 23 Sept 1975 [24 Sept 1974] 38956/75 Headings C2P and C2C The invention comprises compounds of formula (wherein R is C 1-6 alkyl, phenyl or mono- or poly-halophenyl; RSP1/SP is phenyl, C 1-4 alkyl, C 1-4 alkoxy, C 1-6 alkylthio or C 1-6 alkylamino; RSP11/SP is C 1-6 alkyl; and X is O or S); and their preparation by reacting (RO)(RSP1/SP)P(X)(SM) with Hal-CH 2 CONHC(:NH)(ORSP11/SP) where M is H or one equivalent of an alkali metal, alkaline earth metal or ammonium and Hal is halogen, optionally in the presence of an acid-binding agent. Starting materials of formula (wherein RSP111/SP is Me, Et or iso-Pr) are prepared by reacting ClCH 2 COCl with HCl.NH 2 C(:NH)- (ORSP111/SP). Insecticidal and acaricidal compositions comprise a compound I and a carrier.
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