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ChemicalBook CAS DataBase List 4-HYDROXY-8-METHOXY-QUINOLINE-3-CARBOXYLIC ACID ETHYL ESTER

4-HYDROXY-8-METHOXY-QUINOLINE-3-CARBOXYLIC ACID ETHYL ESTER synthesis

5synthesis methods
-

Yield: 64%

Reaction Conditions:

in diphenyl ether-biphenyl eutectic at 250;

Steps:

83.B
Step B: Ethyl 4-hydroxy-8-methoxyquinoline-3-carboxylate: 2-((2-methoxyphenylamino)methylene)malonate (47.6 g, 162 mmol) was suspended in Dowtherm (100 mL) and heated to 250° C. in a sand bath overnight, then cooled to ambient temperature and diluted with pentane (750 mL). The solid was collected by filtration and washed with hexanes (25.7 g, 64%). MS (APCI) m/z 248.0 (M+1).

References:

Miknis, Greg;Lyssikatos, Joseph P.;Laird, Ellen;Tarlton, Eugene;Buckmelter, Alexandre J.;Ren, Li;Rast, Bryson;Schlacter, Stephen T.;Wenglowsky, Steven Mark US2007/49603, 2007, A1 Location in patent:Page/Page column 66

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