(6R,7R)-tert-butyl 6-(aminomethyl)-7-(4-chloro-3-fluorophenyl)-1,4-oxazepane-4-carboxylate 、
2-chlorobenzo[d]oxazole-4-carbonitrile 以in the same manner as in Example 391, step A, the title compound was obtained的产率得到tert-butyl (6R,7R)-7-(4-chloro-3-fluorophenyl)-6-{[(4-cyano-1,3-benzoxazol-2-yl)amino]methyl}-1,4-oxazepane-4-carboxylate