Optically active pyridobenzoxazine derivatives

Details Optically active pyridobenzoxazine derivatives Optically active pyridobenzoxazine derivatives

C - Chemistry, Metallurgy

07

D

C07D 498/06 (2006.01)

Patent

CA 2056345

An optically active pyridobenzoxazine derivative re- presented by formula (I): (see formula I) wherein R1 and R2 wherein R1 and R2, which may be the same or different, each represent an alkyl group having from 1 to 6 carbon atoms, a halogenated alkyl group having from 1 to 6 carbon atoms, a hydroxyalkyl group having from 1 to 6 carbon atoms; or an alkoxymethyl group having from 2 to 7 carbon atoms; R1 represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an acyl group having from 2 to 7 carbon atoms, a halogen-substituted or unsubstituted alkyloxy- carbonyl group having from 2 to 7 carbon atoms, a phenylmethyl- oxycarbonyl group, or a phenylmethyloxycarbonyl group whose phenyl moiety is substituted with a halogen atom, a nitro group, or a methoxy group; R4 represents a methyl or fluoro- methyl group which is in a .beta.-configuration; R5 represents a hydrogen atom, an amino group, a hydroxyl group, a methyl group, or a halogen atom; and X represents a fluorine atom or a chlorine atom, and a salt thereof are disclosed. These compounds exhibit potent antimicrobial activity with broad antimicrobial spectra and improved lipophilic properties. -34-

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