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Hypervalent Iodine in Synthesis: A Novel Two-Step Procedure for the Synthesis of New Derivatives of 1H-Imidazo[1,2-b]pyrazole by the Cyclocondensation Between 5-Amino-4-cyano-3-phenyl-1H-pyrazole and α-Tosyloxyacetophenones or α-Haloacetophenones.

✍ Scribed by Ming Li; Guilong Zhao; Lirong Wen; Huazheng Yang


Publisher
John Wiley and Sons
Year
2005
Weight
20 KB
Volume
36
Category
Article
ISSN
0931-7597

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✦ Synopsis


Abstract

For Abstract see ChemInform Abstract in Full Text.


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✍ Ming Li; Huazheng Yang; Guilong Zhao; Lirong Wen; Wei Cao; Shusheng Zhang 📂 Article 📅 2005 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 119 KB 👁 1 views

A series of new 2-aryl-7-cyano/ethoxycarbonyl-6-methylthio-1H-imidazo[1,2-b]pyrazoles (5) have been synthesized in moderate to good yields, via a two-step cyclocondensation procedure of 5-amino-4cyano/ethoxycarbonyl-3-methylthio-1H-pyrazole (1) and α-bromoacetophenones (3) or α-tosyloxyacetophenones