Diisopropylethylamine → 6'-Chloro-2-methyl-[3,4']bipyridinyl-3'-carboxylic acid (3,5-bis-trifluoromethyl-benzyl)-methyl-amide

Participants

Reaction Steps

To a suspension of 0.10 g (0.40 mmol) 6′-chloro-2-methyl-[3,4′]bipyridinyl-3′-carboxylic acid in 4 ml dicloromethane were added dropwise at 0° C. under argon 0.05 ml (0.6 mmol) oxalyl chloride and one drop of DMF. The reaction mixture was allowed to slowly warm to room temperature. After 1 h the mixture was concentrated in vacuo and redissolved in 2 ml dichloromethane. This solution was added dropwise at 0° C. to a mixture of 0.16 g (0.60 mmol) (3,5-bis-trifluoromethyl-benzyl)-methyl-amine and 0.14 ml (0.80 mmol) N,N-diisopropylethylamine in 2 ml dichloromethane. After 30 min. the reaction mixture was diluted with ethyl acetate and washed with a 1 M aqueous sodium hydroxide solution. The aqueous layer was extracted with ethyl acetate. The combined organic layers were dried over sodium sulfate and concentrated in vacuo to give 0.29 g of crude product. Flash chromatography gave 0.21 g (quant.) of the title compound.

Provenance & Evidence