Acetic Anhydride → 1,3-Dimethyl-1H-indazole-4,5-dicarboxylic anhydride

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of 1,3-dimethyl-1H-indazole-4,5-dicarboxylic acid (6.30 g, 26.9 mmol) and acetic anhydride is stirred at reflux temperature for 3 hours, cooled to 5° C. and filtered. The filter cake is air-dried to give the title product as chartreuse needles (4.80 g, 82.5%), mp 214°-215.5° C.

Herkunft & Nachweise