反应详情

Following General Procedure C, (±)-trans-3-amino-4-[4-(4-chlorobenzyl)piperidin-1-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (394 mg, ˜0.9 mmol) and 5-isocyanato-1,2,3-trimethoxybenzene (250 mg, 1.2 mmol) were coupled in CH2Cl2 (6.0 mL) at 0° C. for 1 h. Chromatography of the crude product with 1:1 hexanes:EtOAc to 100% EtOAc gave the product (445 mg, 77% from (±)-trans-3-[4-(4-chlorobenzyl)piperidin-1-yl]-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester) as a white solid: mp 99.0-102.5° C.; IR 3371 (br), 2932, 1655, 1607, 1552, 1507 cm−1; 1H NMR δ 1.17-1.80 (m, 14H), 2.18 (m, 2H), 2.48 (d, J=7.0 Hz, 2H), 2.95-3.51 (m, 8H), 3.81 (m, 9H), 4.32 (br, 1H), 5.30 (br, 1H), 6.61 (s, 2H), 7.02 (m, 2H), 7.20 (m, 2H); MS m/z 603.2 (M+H)+.