7-[(1R)-2-amino-1-hydroxyethyl]-4-hydroxy-1,3-benzothiazol-2(3H)-one hydrochloride 、
tert-butyl (2-(2-chlorophenyl)ethyl){3-[(2-oxoethyl)thio]propyl}carbamate 在
tert-butyl [2-(2-chlorophenyl)ethyl]{3-[(2-{[(2R)-2-hydroxy-2-(4-hydroxy-2-oxo-2,3-dihydro-1,3-benzothiazol-7-yl)ethyl]amino}ethyl)thio]propyl}carbamate 、 crude product 、 silica gel 、
氨 、
甲醇 、
二氯甲烷 作用下,
以to yield the titled compound (157 mg)的产率得到tert-butyl [2-(2-chlorophenyl)ethyl]{3-[(2-{[(2R)-2-hydroxy-2-(4-hydroxy-2-oxo-2,3-dihydro-1,3-benzothiazol-7-yl)ethyl]amino}ethyl)thio]propyl}carbamate