反应详情

Treatment of (±)-(7-tert-butyl-5-methoxy-2,3-dihydro-1-benzofuran-2-yl)methylamine (1.03 g, 3.8 mmol) with diisopropylethylamine (0.735 g, 5.7 mmol) and benzyl chloroformate (0.711 g, 4.2 mmol) generally according to the procedure described for Intermediate 12 gave 1.2 g (59%) of (±)-benzyl(7-tert-butyl-5-methoxy-2,3-dihydro-1-benzofuran-2-yl)methylcarbamate as a colorless oil. Rf=0.51 (silica, ethyl acetate:hexanes 2:8); Anal. calcd. for C22H27NO4 C, 71.52; H, 7.37; N, 3.79. Found C, 71.2; H, 7.44; N, 3.77.