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ChemicalBook CAS DataBase List ETHYL 4-CHLORO-8-FLUOROQUINOLINE-3-CARBOXYLATE

ETHYL 4-CHLORO-8-FLUOROQUINOLINE-3-CARBOXYLATE synthesis

4synthesis methods
-

Yield:-

Reaction Conditions:

with trichlorophosphate at 100; for 3.5 h;

Steps:



A mixture of 8-fluoro-4-hydroxyquinoline-3-carboxylic acid ethyl ester (6.11 g, 26.0 mmol; see step (b) above) and POCl3 (20 mL) was stirred at 100 °C for 3.5 h, cooled and concentrated to give a yellow semi-solid (9.85 g) which was used without purification.1H-NMR (CDCl3, 400 MHz) δ 9.58 (IH, s), 8.46 (IH, d), 8.04-7.90 (2H, m), 4.60 (2H5 q), 1.54 (3H, t).

References:

WO2007/51982,2007,A1 Location in patent:Page/Page column 44

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