Acetaldehyde → HCID 22268711, compound

Participants

Reaction Steps

Methyl 3-amino-5-(trifluoromethyl)benzoate (cf. procedures (116a) and (80a); 177 mg, 0.81 mmol) was dissolved in MeOH (12 mL) and the resulting solution was charged successively with acetaldehyde (0.045 mL, 0.81 mmol) and sodium cyanoborohydride (64 mg, 1.01 mmol). The reaction was stirred at RT for 12 h, concentrated in vacuo, and diluted with EtOAc. The organic phase was washed with sat. NaHCO3, water (2×), and brine before being dried (Na2SO4), filtered, and concentrated in vacuo. This product was dissolved in 3:1 THF/MeOH (12 mL) and the resultant solution was charged with lithium hydroxide (3 mL of a 1N solution). The reaction was stirred for 14 h, acidified with 1N HCl, and extracted with EtOAc (2×). The organic extracts were combined, washed with water, washed with brine, dried (Na2SO4), filtered, and concentrated in vacuo to provide 3-ethylamino-5-(trifluoromethyl)benzoic acid.

Provenance & Evidence