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Hydrolysis of 2-decarboxamido-2-cyano-6-deoxy-tetracycline derivatives

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1. THE PROCESS FOR THE PREPARATION OF AN ACID-STABLE 6DEOXYTETRACYCLINE FROM ITS 2-DECARBOXAMIDO-2-NITRILE WHICH COMPRISES FORMING A FLUID MIXTURE OF SAID NITRILE WITH A LIQUID REACTION MEDIUM COMPRISING AT LEAST ONE MOLE EACH OF WATER AND OF A FLUORIDE PER MOL OF SAID NITRILE AND HAVING A FLUORIDE CONCENTRATION OF AT LEAST ABOUT TWO MOLES PER LITER, SAID FLUORIDE BEING SELECTED FROM THE GROUP CONSISTING OF BORON TRIFLUORIDE COMPLEXES AND HYDROGEN FLUORIDE, AND MAINTAINING SAID MIXTURE AT A TEMPERATURE BETWEEN ABOUT 0 AND 100*C. UNTIL THE CONVERSION IS SUBSTANTIALLY COMPLETE.
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