Sodium Hydroxide → HCID 66725242, compound

Participants

Reaction Steps

To a solution of ethyl 2-methyl-5-({[4-(methylsulfonyl)benzyl]amino}carbonyl)-6-oxo-1-[3-(trifluoromethyl)phenyl]-1,6-dihydropyridine-3-carboxylate (0.70 g, 1.30 mmol) in THF (10 ml) and water (10 ml) was added NaOH (1M, 2 ml, 2 mmol), and the mixture was stirred for 1 h at room temperature, monitoring the progress of the reaction by LC-MS. 20% conversion was observed and another portion of NaOH (1M, 1 ml, 1 mmol) was added, and the reaction was allowed to run for another hour. This process was repeated until complete conversion of the ester was observed (normally 3-4 hours). The outcome of the reaction is two compounds with the same mass, in a 95:5 proportion. The main product is the subtitle compound, and the other is a regioisomer. The reaction mixture was evaporated in order to remove THF, and the residual water solution was acidified and then extracted into EtOAc. The organic phase was collected and dried over Na2SO4. Filtration and evaporation gave a crude product 0.60 g (90%) of a yellowish solid, which was used further without purification. A portion of the product was purified using preparative HPLC.

Provenance & Evidence