5-O-DESOSAMINYLERYTHRONOLIDE A DERIVATIVE

摘要

Object: to provide a novel macrolide antibiotic having a potent antibacterial activity. Constitution: a tricyclic carbamate derivative of a 3-oxo-6-methoxy-substituted 5-O-desosaminylerythronolide A derivative represented by general formula (I), and a pharmaceutically acceptable acid addition salt thereof. In formula (I), -A represents -N(R<3>)- (wherein R<3> represents hydrogen or C1-C3 alkyl) or -N=; and R<1> and R<2> represent each C1-C3 alkyl. An intermediate, represented by general formula (II), useful for producing the 3-oxo-substituted 5-O-desosaminylerythronolide A derivative, wherein R<4> represents acetyl or propionyl.