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Sydnones as Masked Hydrazines for the Synthesis of 4‐Arylazo‐1,2‐dihydro‐pyrazol‐3‐one Derivatives

✍ Scribed by Shinge, Prashant S.; Latthe, Prashant R.; Badami, Bharati V.


Book ID
120976830
Publisher
Taylor and Francis Group
Year
2005
Tongue
English
Weight
99 KB
Volume
35
Category
Article
ISSN
0039-7911

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The claimed synthesis of 2a from 2-methyl-3-chromonecarbonitrile is shown not to lead to%, as previously reported but to 1,4-dihydro-l-phenyl-3-methyl[l]benzopyrano~3,4-d]pyrazole-4-one IOa.