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Studies on the Fischer indole synthesis: Behaviour of cyclic hydrazones of tetrahydropyridazine and pyrazoline series in polyphosphoric acid.

✍ Scribed by Franco Sannicolò


Book ID
103398768
Publisher
Elsevier Science
Year
1984
Tongue
French
Weight
106 KB
Volume
25
Category
Article
ISSN
0040-4039

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## Abstract The 1__H__‐pyrazole‐3‐carboxylic acid **2**, obtained from the furan‐2,3‐dione **1** and __N__‐Benzylidene‐__N__'‐(3‐nitrophenyl) hydrazine, was converted via reactions of its acid chloride **3** with various alcohols or N‐nucleo‐philes into the corresponding ester or amide derivatives