(6,7-substituted-8-alkoxy-1-cyclopropyl-1,4-dihydro-4-oxo-3-...

C - Chemistry – Metallurgy – 07 – F

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C07F 5/04 (2006.01)

Patent

CA 2046361

(6,7-Substituted-8-alkoxy-1-cyclopropyl-1,4-dihydro-4- oxo-3-quinolinecarboxylic acid-O3,O4) bis (acyloxy-O) borate, and salts and hydrates thereof, represented by the general formula (I) Image wherein X denotes a halogen atom; R denotes an aliphatic acyloxy group having 2 - 6 carbon atoms, aliphatic acyloxy group having 2 - 6 carbon atoms optionally substituted with a halogen atom, or aromatic acyloxy group having 7 - 11 carbon atoms; R1 denotes a lower alkyl group; R2 denotes a hydrogen atom, halogen atom, amino group or nitro group; Z denotes a halogen atom, Image (wherein n is 1 or 2; R3 denotes hydrogen atom; a lower alkyl group, acyl group, alkoxycarbonyl group or aralkyl group; R4 and R5 each independently denote a hydrogen atom, lower alkyl group, substituted lower alkyl group, cycloalkyl group or phenyl group respectively) or Image (wherein k is 0, 1 or 2; ~ is 0, 1 or 2; m is 0 or 1; R6 denotes a hydrogen atom, halogen atom, lower alkyl group or hydroxyl group; R7 denotes a hydrogen atom, lower alkyl group or substituted lower alkyl group; R8 denotes a hydrogen atom, lower alkyl group, acyl group, alkoxycarbonyl group or aralkyl group) or an azetidino group, pyrrolidino group, 3-hydroxypyrrolidino group, piperidino group, morpholino group or thiomorpholino group. These compounds are especially useful in the preparation of quinolonecarboxylic compounds which are useful as medicaments.

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