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A Trimeric Cyclopentadienone Derivative by Photolysis of 3,5-Diphenyl-4H-thiopyran-4-one 1,1-Dioxide with Daylight

✍ Scribed by Prof. Dr. Walter Ried; Dipl.-Chem. Hubert Bopp


Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
241 KB
Volume
16
Category
Article
ISSN
0044-8249

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Synthesis of 1,2,4-Triazolo[4,3-a]pyrimi
✍ Nehal M. Elwan; Enas M. Awad; Hamdi M. Hassaneen; Anthony Linden; Heinz Heimgart 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 German ⚖ 115 KB

## Abstract The reaction of 1,2‐dihydro‐6‐(phenylamino)‐2‐thioxopyrimidin‐4(3__H__)one (**16**) with __N__‐arylhydrazonoyl halides **15** in CHCl~3~ in the presence of Et~3~N under reflux afforded the corresponding 1,2,4‐triazolo[4,3‐__a__]pyrimidin‐5‐ones of type **20** in good yields (__Scheme 3_