Formaldehyde → 1-Piperidin-1-ylmethyl-3-(1-H-pyrrol-2-ylmethylene)-1,3-dihydro-indol-2-one

Participants

Reaction Conditions

Reaction Steps

A solution of Z-(1H-Pyrrol-2-ylmethylene)-1,3-dihydro-indol-2-one (0.60 g, 2.85 mmol), paraformaldehyde (0.13 g, 4.28 mmol) and piperidine (0.24 g, 2.85 mmol) in EtOH (5 mL) was heated to 60-70° C. for 14 h. The reaction mixture was cooled to −20° C. for 1 h and the fine yellow solid present was collected by filtration. The solid collected was dried under vacuum to give the title compound as a yellow solid (0.68 g, 77%).

Provenance & Evidence