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An Efficient Route to Thieno[2,3-d]pyrimidine Derivatives by Tandem [2,3] and [3,3] Sigmatropic Rearrangement.

✍ Scribed by Krishna C. Majumdar; Nilasish Pal; Sudip K. Chattopadhyay


Publisher
John Wiley and Sons
Year
2007
Weight
22 KB
Volume
38
Category
Article
ISSN
0931-7597

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✦ Synopsis


Abstract

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An efficient synthesis of new pyrido[4β€²,
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## Abstract magnified image The carbodiimides **5**, obtained from reactions of iminophosphorane **4** with aromatic isocyanates, reacted with amines, phenols or ROH to give 2‐substituted 5,6,7,8‐tetrahydropyrido[4β€²,3β€²:4,5]thieno[2,3‐__d__]‐pyrimidin‐4(3__H__)‐one 7 in the presence of catalytic am