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The synthesis of pyrido[4,3-d]pyrimidin-4(3H)-ones from 4-amino-nicotinic acid

✍ Scribed by Ismail, A. G.; Wibberley, D. G.

Book ID: 119963478
Publisher: The Royal Society of Chemistry
Year: 1967
Tongue: English
Weight: 578 KB
Category: Article
ISSN: 0022-4952
DOI: 10.1039/J39670002613

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## Abstract magnified image The thienopyridine derivative **2**, obtained from reaction of acetoacetic ester with **1** in the presence of tin tetrachloride, was treated with triphenylphosphine in hexachloroethane and Et~3~N to give iminophosphorane **3**. Iminophosphorane **3** reacted with pheny