| abstract |
PROCEDURE FOR OBTAINING DERIVATIVES OF THE DIPHENYL ETHER OF FORMULA (I), IN WHICH X AND Z ARE A HYDROGEN OR HALOGEN ATOM; Y IS A HALOGEN ATOM, A TRIFLUOROMETHY OR METHOXY RADICAL, AND R IS A RADICAL OF FORMULA (II), OF FORMULA (III) OR OF FORMULA -SO2R4. CONSISTS OF THE REACTION OF A COMPOUND OF FORMULA (IV), WITH A COMPOUND OF FORMULA R''-OH, IN WHICH R'' IS A LOWER ALKYL RADICAL, A RADICAL OF FORMULA (II) OR FORMULA (III), IN WHICH X, Y, Z, R1, R2 AND R3 HAVE THE ABOVE MEANINGS, IN THE PRESENCE OF SODIUM OR POTASSIUM HYDROXIDE, IN A WATER-MISCIBLE SOLVENT, AT A TEMPERATURE BETWEEN 20 GC AND 80 GC. IF R'' IS A LOWER ALKYL RADICAL, THE PRODUCT PREVIOUSLY OBTAINED IS TREATED WITH A PYRIDINIUM SALT AND A MINERAL ACID AT 150-250 GC FOR 5 TO 30 MINUTES, AND SUBSEQUENTLY, WITH A COMPOUND OF FORMULA CSO2R", IN THE PRESENCE OF A BASE AND IN AN INERT SOLVENT *FORMULA* |