2-Methoxy-5-(trifluoromethoxy)phenylboronic acid → (3-(2-Methoxy-5-trifluoromethoxyphenyl)-6-chloropyrazin-2-yl)[(4-methoxyphenyl)methyl]amine

Participants

Reaction Conditions

Reaction Steps

In a pressure tube, a mixture of the product from step A (1 equivalent), 2-methoxy-5-trifluoromethoxyphenylboronic acid (1.6 equivalents) and Pd(PPh3)4 (0.04 equivalents) in toluene (4 ml/mmol of product from step A), ethanol (0.2 ml/mmol of product from step A) and aqueous K2CO3 (2M, 2 ml/mmol of product from step A) is heated to 80° C. for 16 hours. The mixture is diluted with ethyl acetate, and the organic fraction washed with NaOH (2M, 20 mL/mmol of product from step A) and brine (3×20 ml/mmol of product from step A), then dried (MgSO4), filtered and the solvent removed under reduced pressure. Chromatography of the residue provides (3-(2-methoxy-5-trifluoromethoxyphenyl)-6-chloropyrazin-2-yl)[(4-methoxyphenyl)methyl]amine.

Provenance & Evidence