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SYNTHESIS OF PYRAZOLES AND 2-PYRAZOLINES FROM C-PHENYLAMINOCARBONYL-N-ARYLFORMOHYDRAZIDOYL CHLORIDES

✍ Scribed by Hassaneen, Hamdi M.; Fahmi, Abdelgawad A.; Abbas, Ikhlas M.; Shawali, Ahmad S.


Book ID
127264925
Publisher
Taylor and Francis Group
Year
1989
Tongue
English
Weight
277 KB
Volume
21
Category
Article
ISSN
0030-4948

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## Abstract magnified image Novel __N__2‐arylated pyrano[2,3‐__c__]pyrazol‐6‐ones **2** can be prepared in a selective manner by generating the anion of **1** (**Rο£ΎH**) with lithium hexamethyldisilazide in DMF and quenching with activated aryl halides. Sterically demanding groups such as phenyl as