Novel 1(2h) quinoline carboxylic acid derivatives, method for preparing same, and use thereof for synthesising substances having antibiotic properties

摘要

PCT No. PCT/FR97/00352 Sec. 371 Date Sep. 28, 1998 Sec. 102(e) Date Sep. 28, 1998 PCT Filed Feb. 27, 1997 PCT Pub. No. WO97/31926 PCT Pub. Date Sep. 4, 1997A compound of the formula wherein alc1, alc2 and alc3 are alkyl of up to 8 carbon atoms, n is an integer from 0 to 8, R1 and R2 are O-alkyl of up to 8 carbon atoms, or form together with the carbon atom to which they are linked a cyclic acetal which are useful intermediates to produce the compounds of the formula