C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/235.82
C07D 498/08 (2006.01)
Patent
CA 1095036
ABSTRACT OF THE DISCLOSURE : Method of preparing 3-amino-rifamycins S and SV having antibiotic activity. According to such a method a 3-bromo- rifamycin S is reacted with sodium nitrite to give 3-nitro- rifamycin S which is reduced with zinc powder to give the 3- amino-rifamycin SV from which the 3-amino-rifamycin S can be obtained by treatment with an oxidating agent.
322222
Marsili Leonardo
Pasqualucci Carmine
Rossetti Vittorio
Archifar Laboratori Chimico Farmacologici S.p.a.
Robic Robic & Associes/associates
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