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Investigation of Pyrazole Compounds. VIII.1 Synthesis and Acylation of Pyrazolones Derived from Hydrazine and Methylhydrazine

✍ Scribed by Graham, Bruce; Porter, H. D.; Weissberger, A.

Book ID
115471244
Publisher
American Chemical Society
Year
1949
Tongue
English
Weight
762 KB
Volume
71
Category
Article
ISSN
0002-7863

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Efficient and regioselective syntheses of l-phenyl-5-pyrazolones substituted with a phosphoranylidene group in the 3-position and of 3-alkoxycarbonyl-5-methoxy-l-phenyl pyrazoles ~e described. The key step is the formation of functionalized hydrazones by [2+2] cycloaddition reaction of phosphazenes