| abstract |
PROCEDURE FOR THE PREPARATION OF ACID DERIVATIVES (DI) -THIOPHOSPHORICS AND PHOSPHONICS, OF GENERAL FORMULA (I), IN WHICH R MEANS ALCOHYL, ALCOXY OR ALCOHYL MERKID; R2 AND R3 MEAN HYDROGEN, ALCOHYL OR FURYLMETYL; R4 MEANS ALCOHYL OR PHENYL; YX MEANS OXYGEN OR SULFUR. IT CONSISTS IN REACTIONING COMPOUNDS OF GENERAL FORMULA (II), IN WHICH R, R1 AND X HAVE THE SIGNIFIED, WITH A COMPOUND OF FORMULA (III), IN WHICH R2, R3 AND R4 HAVE THE MEANINGS ALREADY MENTIONED; AND HAL MEANS HALOGEN, EVENTUALLY IN THE PRESENCE OF A SOLVENT INERT. OF APPLICATION AS INSECTICIDES TO FIGHT BITING AND TEETHING INSECTS, MITTINGS AND NEMATODES. |