反应详情

A mixture of 3-hydroxy-benzonitrile (5.0 g, 42.0 mmol) and imidazole (7.15 g, 105 mmol) in N,N-dimethylformamide (100 mL) was treated with tert-butyl-chloro-dimethyl-silane (7.6 g, 50.4 mmol) in N,N-dimethylformamide (50 mL) over 10 min. The reaction was stirred at rt overnight. The reaction mixture was poured into water, and extracted with ethyl acetate (2×). The solvent was removed, and the resulting residue was chromatographered using hexane/ethyl acetate (10:1) to give the title compound (9.27 g, 95%). MS (DCI/NH3) m/z 234 (M+1)+. 1HNMR (500 MHz, DMSO-d6) δ ppm 0.26 (s, 6 H) 1.00 (s, 9 H) 7.26 (dq, J=7.93, 1.22 Hz, 1 H) 7.35 (t, J=2.44 Hz, 1 H) 7.50 (m, 2 H).

1. extractionextracted with ethyl acetate (2×)
2. customThe solvent was removed