反应详情

To 2-benzyloxy-benzenesulfonyl chloride (3.11 g, 11 mmol) in dichloromethane (50 mL) and pyridine (2.6 mL, 3 equiv) was added 3-amino-N-methoxy-N-methyl-succinamic acid tert-butyl ester (1 equiv). The reaction stirred for 16 h and was washed with 10% sulfuric acid, water, and then brine. To give (S)-3-(2-benzyloxy-benzenesulfonylamino)-N-methoxy-N-methyl-succinamic acid tert-butyl ester as a yellow oil (4.82 g, 92%) that was sufficiently pure for further use. 1H NMR (CDCl3) 7.88(d,1H), 7.57(d,2H), 7.40(m,3H), 7.17(d,1H), 7.03(m,2H), 5.92(d,1H), 5.25(s,2H), 4.73(bs,1H), 3.57(s,3H), 2.86(s,3H), 2.63-2.39(AB quartet, 2H), 1.40(s,9H).

1. washwas washed with 10% sulfuric acid, water