摘要:
Caprazene and caprazol could be synthesized by hydrolysis of a caprazamycin. There could be synthesized a caprazene-1'''-amide derivative of the formula (II) and a caprazene-1'''-ester derivative of the formula (III) from caprazene. Further, there could be synthesized a caprazol-1'''-amide derivative of the formula (V) and a caprazol-1'''- amide-3'''-ester derivative and a caprazol-3'''-ester derivative, etc. from caprazol. Furthermore, an imidazolidinone derivative could be synthesized from the ring-opened product of the 1,4-diazepinone ring of caprazol. The novel caprazene derivative, novel caprazol derivative and novel imidazolidinone derivative now synthesized exhibit excellent antibacterial activities against a variety of bacteria, including acid-fast bacteria.
摘要:
5"-N-alkoxycarbonyl and 5"-N-aralkyloxycarbonyl derivatives of caprazene, said caprazene being the compound represented by the following formula (I)
摘要:
This invention relates to novel aminoglycoside antibiotics, which have potent antimicrobial activity against bacteria, which induce infectious diseases, particularly MRSA, and has no significant nephrotoxicity, and process for producing them. More particularly, the present invention relates to compounds represented by formula (Ia) or their pharmacologically acceptable salts or solvates, or their diastereomer mixtures, antimicrobial agents comprising them, and a process for producing them.