Acetic Acid → 3,4-Dichloro-5-methyl-N-(1-nitrosopiperidin-4-yl)-1H-pyrrole-2-carboxamide

Participants

Reaction Conditions

Reaction Steps

A solution of NaNO2 (1.7 g, 24.6 mmol) in 20 ml of water was added to a solution of 4-{[(3,4-dichloro-5-methyl-1H-pyrrol-2-yl)carbonyl]amino}piperidinium trifluoroacetate (Intermediate 86; 4 g, 10.3 mmol) and 400 μl acetic acid in 60 ml of 1:1 EtOH—H2O. The mixture was heated to 90° C. for 1 hour. After cooling to room temperature, 200 ml of water was added. White solids were collected by filtration and dried in vacuo (2.8 g).

Provenance & Evidence