The 4(3H)‐quinazoline derivatives (V) mentioned in the title are prepared by cyclocondensation of the substituted thiosemicarbazides (IV) with the quinazolinones (III) in the presence of phosphorus oxychloride.
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ChemInform Abstract: Synthesis of Thiadiazolo Derivatives of 4(3H)‐Quinazolinone as Potential Antimicrobial Agents