PROCESS FOR PREPARING RIFAMYCIN COMPOUNDS

摘要

Rifamycins I (R = H, C4-C8 alkyl, C3-C8 branched alkyl, C3-C4 alkenyl, C3-C6 cycloalkyl, C7-C8 cycloalkylalkyl, C3-C7 alkoxyalkyl, C5-C6-alkyl-furyl, C5-C6 alkyl-tetrahydrofuryl, C5-C6 alkanoyl or C2-C6 monohaloalkanoyl; Y = -H or -COCH3) with antibacterial effect was prepd. by reacting compound II with 4-piperidone III.