Selective Synthesis of Pyrazolo[3,4‐d]pyrimidine, N‐(1H‐Pyrazol‐5‐yl)formamide, or N‐(1H‐Pyrazol‐5‐yl)formamidine Derivatives from N‐1‐Substituted‐5‐aminopyrazoles with New Vilsmeier‐Type Reagents.

Chun Hsi Chang,Henry J. Tsai,Yu-Ying Huang,Hui-Yi Lin,Li-Ya Wang,Tian Shung Wu,Fung Fuh Wong

ChemInform（2013）

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摘要

The direction of reaction of aminopyrazoles (I) with N-methylformamide or formamide in the presence of POCl3 depends on the structure of starting compound (I) and Vilsmeier reagent used.

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关键词

selective synthesis,h-pyrazol,vilsmeier-type

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