Triethylamine → tert-butyl N-[(4-amino-2-fluorophenyl)methyl]carbamate

Participants

Reaction Steps

A solution of 2-fluoro-4-nitrobenzonitrile (0.541 g, 2.43 mmol) in methanol (20 mL) and hydrochloric acid (3 mL, 6 N) was hydrogenated (55 psi) over 10% palladium on carbon (164 mg) overnight. The reaction mixture was filtered and concentrated under reduced pressure. The residue was dissolved in tetrahydrofuran (5 mL) and treated with 2-(tert-butoxycarbonyloxyimino)-2-phenylacetonitrile (0.517 mg, 2.10 mmol) and triethylamine (0.6 mL, 4.3 mmol). After 16 h at rt, the reaction mixture was diluted with dichloromethane and washed with sodium bicarbonate solution and brine, dried (MgSO4), and concentrated under reduced pressure. The residue was purified by silica gel chromatography (gradient from 0 to 50% ethyl acetate in hexanes) to give 1-63A-(0.287 g, 60%) as a colorless oil which solidified on standing.

Provenance & Evidence