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A convenient procedure for the preparation of 5,6-dihydro-6-nitro-5-phenylfuro[2,3-d]pyrimidin-4(3H)-ones and 5-phenylfuro[2,3-d]pyrimidin-4(3H)-ones

✍ Scribed by Daniel Dauzonne; Anne Adam-Launay


Book ID
108372830
Publisher
Elsevier Science
Year
1992
Tongue
French
Weight
796 KB
Volume
48
Category
Article
ISSN
0040-4020

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## Abstract The reactions of 2‐benzamido‐4,5‐dihydro‐3‐thiophene(‐3‐furan‐)carbonitriles 1a–c (and 11a–c) with acetic (or propionic) anhydride in the presence of tin(IV) chloride give the corresponding 3‐acetyl‐5,6‐dihydro‐2‐phenylthieno(‐furo‐)‐[2,3‐__d__]pyrimidin‐4(3__H__)‐ones 2a–c (and 12a–c)

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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