Di-tert-butyl dicarbonate → HCID 86675119, compound

Participants

Reaction Conditions

Reaction Steps

tert-Butyl 4-bromo-2-chlorobenzoate (AI18). To a stirred solution of 4-bromo-2-chlorobenzoic acid (5 g, 21.37 mmol) in THF (30 mL) was added di-tert-butyl dicarbonate (25.5 g, 25.58 mmol), TEA (3.2 g, 31.98 mmol) and DMAP (0.78 g, 6.398 mmol), and the reaction mixture was stirred at 25° C. for 18 h. The reaction mixture was diluted with EtOAc and washed with water. The combined organic layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by flash chromatography (SiO2, 100-200 mesh; eluting with 2-3% EtOAc in n-hexane) to afford the title compound as a liquid (3.2 g, 51%): 1H NMR (400 MHz, CDCl3) δ 7.62 (m, 2H), 7.44 (d, J=8.4 Hz, 1H), 1.59 (s, 9H); ESIMS m/z 290.10 ([M+H]+); IR (thin film) 1728 cm−1.

Provenance & Evidence