Process for the simultaneous production of benanomicins A and B
申请人:Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai
公开号:US05278052A1
公开(公告)日:1994-01-11
Benanomicin A and Benanomicin B are fermentatively produced by the cultivation of a new microorganism Actinomadura spadix, designated as MH193-16F4 strain.
Two new antibiotics which are now nominated as benanomicin A and benanomicin B, respectively, are fermentatively produced by the cultivation of a new microorganism, designated as MH193-16F4 strain, of Actinomycetes. Benanomicins A and B each show antifungal activity and are useful as a therapeutic antifungal agent. A new compound, dexylosylbenanomicin B is now produced by chemical conversion of benanomicin B, and this semi-synthetic antibiotic also shows antifungal activity and is useful as a therapeutic antifungal agent.
Antibiotic N-acetylbenanomicin B, and the production and uses thereof
申请人:Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai
公开号:US05093323A1
公开(公告)日:1992-03-03
As a new compound is now provided N-acetylbenanomicin B which is useful as an antifungal agent and also as antiviral agent for inhibiting infection of human T-cell with HIV, namely a virus causative of acquired human immunodeficiency syndrome. N-acetylbenanomicin B may be prepared by acetylation of 4"-amino group of benanomicin B which is fermentatively produced by a new microorganism, MH193-16F4 strain of actinomycetes.
This strategy enabled us to control the two stereogenic sites in the B ring (C-5 and C-6) and the regioselective introduction of the carbohydrate moiety. The ABCD tetracycle could serve as an ideal platform for the divergent access to various BpAs. The amino acid (D-alanine) was introduced onto the ABCD tetracycle. Glycosylation was promoted by the combination of Cp(2)HfCl(2) and AgOTf (1:2 ratio). Construction