Acetic Acid → Methyl 4-(Bromomethyl)-2,6-dichloronicotinate

Participants

Reaction Steps

To a solution of 5.3 g (24.1 mmol) 2,6-dichloro-4-methyl-pyridine-3-carboxylic acid methylester in CCl4 (92 ml) were added 3.1 g (26.5 mmol) N-Bromosuccinimide, 395 mg (2.4 mmol) AlBN and 1.45 ml (25.3 mmol) acetic acid. The mixture was irradiated with a 200 W Wolfram lamp at 60° C. for 24 h. Subsequently the mixture was filtered through celite and the filtrate was concentrated in vacuo. Purification of the residue by CC (hexane/EtOAc 97:3) provided 5.2 g of a mixture of 2,6-dichloro-4-methyl-pyridine-3-carboxylic acid methylester and 4-(bromomethyl)-2,6-dichloro-pyridine-3-carboxylic acid methylester which was used in subsequent reactions without further purification.

Provenance & Evidence