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Patent / 1973

Catalytic dehalogenation, alone or with simultaneous reduction, of 11a-halo-6-deoxy-6-demethyl, 6-methylenetetracyclines by hydrazine

Authors:
  • Ivan Villax
Source:
GB 1360006
Methacycline and .alpha.- and .beta.-doxycycline sulfosalicylates were prepd. by dehalogenating 11a-chloro-6-deoxy-6-demethyl-6-methylene-5-hydroxytetracycline hydrofluoride or p-toluenesulfonate with N2H4.H2O-Pd-C and treating with 5-sulfosalicylic acid.