Process for the preparation of 3-iminomethyl derivatives of rifamycin SV
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United States of America
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May 22, 1984
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app pub date -
Apr 11, 1983
filing date -
Jul 25, 1973
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Abstract
A process for the preparation in homogeneous phase and in quantitative yield of 3-iminomethyl derivatives of rifamycin SV useful as antibiotic agents. Rifamycin S is reacted in an organic solvent .Iadd.with a compound .Iaddend. ##STR1## to give a solution of .[.1,3-oxazino-(5,6-c) rifamycins.]. .Iadd.an intermediate compound .Iaddend.which is treated with an organic solvent at a pH from 4 to 6. The aqueous phase is discharged and the organic phase is treated with an amine .Iadd.or hydrazine .Iaddend.under basic conditions, the desired derivatives being finally isolated from this organic phase according to usual techniques.
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