5-amino-2,3,4,5-tetrahydro-1-benzothiepine-8-carboxylic acid methyl ester 、
氯甲酸苄酯 以the objective 5-(benzyloxycarbonylamino)-2,3,4,5-tetrahydro-1-benzothiepine-8-carboxylic acid methyl ester (3.53 g) was obtained as colorless crystals的产率得到5-(benzyloxycarbonylamino)-2,3,4,5-tetrahydro-1-benzothiepine-8-carboxylic acid methyl ester