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Aminopyrazoles. IV . Pyrazol-3- and 5-amines from 2,3-dihaloalkanenitriles or 3-chloroacrylonitriles and hydrazines

✍ Scribed by Günter Ege; Hermann Franz


Book ID
112126897
Publisher
Journal of Heterocyclic Chemistry
Year
1982
Tongue
English
Weight
480 KB
Volume
19
Category
Article
ISSN
0022-152X

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3-Methylthio-pyrano[4,3-c]pyrazol-4(2H)-
✍ Yu-Xin Li; You-Ming Wang; Xiao-Ping Yang; Su-Hua Wang; Zheng-Ming Li 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 72 KB 👁 1 views

## Abstract A useful synthesis of 3‐methylthio‐6‐methyl‐pyrano[4,3‐__c__]pyrazol‐4(2__H__)‐ones via 3‐(bis‐methylthio)methylene‐5,6‐dihydro‐6‐alkyl(aryl)‐2__H__‐pyran‐2,4‐dione with hydrazine as well as methyl and phenyl hydrazines is described and the mechanism of the formation is discussed. © 200