Oxalic Acid → Rifampicin

Participants

Reaction Steps

0.36 g. Oxalic acid and 1.0 g. 1,3,5-tri-(tert.-butyl)-hexahydro-1,3,5-triazine are added to a solution of 2.8 g. rifamycin S in 10 ml. dimethylformamide. The mixture is kept at 75° C. for about 1 hour, then 1.7 g. of acidified 1-amino-4-methylpiperazine are added directly, according to the process described in Example 7. The chloroform extract finally obtained is concentrated to a small volume and diluted with an appropriate mixture of ethyl acetate-acetone to give a high yield of pure rifampicin.

Provenance & Evidence