abstract |
PROCESS FOR THE PREPARATION OF CEPHALEXIN MONOHYDRATE AND CEPHADROXYL MONOHYDRATE, IN WHICH THE REACTION OF A PREPARED MIXED ANHYDRIDE FROM A PHENYLGLYCIN DANE SALT OR P-HYDROXYPHENYLGLYCIN WITH A CHLOROFORMATE IS CARRIED OUT WITH AQUEOUS SOLUTION OF 7 -ADCA IN A SOLVENT TAKEN IN THE COMPOUND GROUP OF DIMETHYL SULFOXIDE, DIMETHYL-ACETAMIDE, FORMAMIDE, DIMETHYLFORMAMIDE AND DIOXANE. |