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Synthesis of 3-hydroxythienopyrimidine-2,4-(1H,3H)-diones from 2,3- and 3,4-thiophenedicarboxylic acids

✍ Scribed by Tserng, Kou-Yi; Bauer, Ludwig


Book ID
120411570
Publisher
American Chemical Society
Year
1975
Tongue
English
Weight
613 KB
Volume
40
Category
Article
ISSN
0022-3263

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## Abstract 4‐Hydroxy‐1__H__‐quinolin‐2‐ones (**1**) react with thiocyanogen in acetic acid to the corresponding 3‐thiocyanato‐1__H__,3__H__‐quinoline‐2,4‐diones (**2**) in good yields. In some cases, 3‐bromo‐1__H__,3__H__‐quinoline‐2,4‐diones (**4**) were isolated as minor reaction products. Compo