(1S)-1-naphthylethaneammonium [(5R)-5-(2-tert-butoxy-2-oxoethyl)-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b]azepin-1-yl]acetate hydrochloride 以
乙醚 、
正己烷 为溶剂,
以2.25 g的产率得到[(5R)-5-(2-tert-butoxy-2-oxoethyl)-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b]azepin-1-yl]acetic acid