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ChemicalBook CAS DataBase List 4-Hydroxy -6-iodoquinoline-3- carbonitrile
872576-92-6

4-Hydroxy -6-iodoquinoline-3- carbonitrile synthesis

3synthesis methods
2-Propenoic acid, 2-cyano-3-[(4-iodophenyl)amino]-, ethyl ester

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4-Hydroxy -6-iodoquinoline-3- carbonitrile

872576-92-6
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Yield:872576-92-6 85%

Reaction Conditions:

in diphenylether at 260; for 12 h;

Steps:

14.b

b) Preparation of 6-iodo-4-oxo-1,4-dihydro-quinoline-3-carbonitrile A mixture of (Z)-2-cyano-3-(4-iodo-phenylamino)-acrylic acid ethyl ester and (E)-2-cyano-3-(4-iodo-phenylamino)-acrylic acid ethyl ester (example 14a, 150 g, 0.44 mol) in diphenylether (1500 mL) was refluxed at 260° C. for 12 h. After cooling, ether was added. The solid was collected by filtration, washed with ether and dried to obtain 6-iodo-4-oxo-1,4-dihydro-quinoline-3-carbonitrile (110.5 g, 85%) as a black solid. LC-MS m/e 297 (MH+).

References:

US2006/4046,2006,A1 Location in patent:Page/Page column 20

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