trimethylsilyldiazomethane Et2O → 3-Cyano-5-ethyl-1H-pyrrole-2-carboxylic acid methyl ester

Beteiligte Stoffe

Reaktionsschritte

3-Cyano-5-ethyl-1H-pyrrole-2-carboxylic acid (Intermediate 31) (500 mg) was dissolved in anhydrous THF (5 ml) and cooled to 0° C. (Trimethylsilyl)diazomethane/ether (2 ml) was added. The mixture was stirred at room temperature under nitrogen gas for 1 h. The solvent was removed in vacuo and MeOH was added. The mixture was stirred for a further 15 min, the solvent was removed in vacuo and the solid was dried under vacuum to give the title compound (580 mg).

Herkunft & Nachweise