An unexpected result in the condensation
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Pier Luigi Ferrarini; Claudio Mori; Filippo Mori; Giuseppe Saccomanni; Silvia Ba
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Article
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1999
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Journal of Heterocyclic Chemistry
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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.