𝔖 Bobbio Scriptorium
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Pyrylocyanines. 30. Unsymmetrical 4,6,4′,6′-tetraphenyl-substituted 2-pyrido-2-pyrylocyanines with trimethylene groupings in the chromophore

✍ Scribed by N. A. Derevyanko; A. A. Ishchenko; A. I. Tolmachev


Book ID
104792383
Publisher
Springer US
Year
1992
Tongue
English
Weight
319 KB
Volume
28
Category
Article
ISSN
0009-3122

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An unexpected result in the condensation
✍ Pier Luigi Ferrarini; Claudio Mori; Filippo Mori; Giuseppe Saccomanni; Silvia Ba 📂 Article 📅 1999 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 377 KB

## Abstract We report here the condensation of 2‐amino‐6‐bromopyridine with ethyl 4‐chloroacetoacetate in polyphosphoric acid. In this reaction, a mixture of the four possible dihalo‐4__H__‐pyrido[1,2‐__a__]pyrimidin‐4‐ones 1–4 was obtained.