AN EFFICIENT SYNTHESIS OF DIMETHOXY-4-QUINOLONES AND TRIMETHOXY-4-QUINOLONES

J TODA,T FUSE, E KISHIKAWA, N ANDO, R NEGISHI,Y HORIGUCHI,T SANO

Heterocycles（1994）

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摘要

An excellent method of preparation of N-aryl-enamino esters (4) was achieved by developing N-N exchange reaction of an N-methyl-enamino ester (6) with di- and trimethoxyanilines (3). Thermolysis of 4 in xylene gave di- and trimethoxy-4-quinolones (7) in excellent yields.

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efficient synthesis

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