((R)-2-{6-[3,6-Dioxo-5-[1-phenyl-meth-(Z)-ylidene]-piperazin-(2Z)-ylidenemethyl]-pyridin-3-yloxy}-1-phenyl-ethyl)-carbamic acid tert-butyl ester 、
三氟乙酸 以
二氯甲烷 为溶剂,
以93%的产率得到(R)-2-{6-[(2Z,5Z)-3,6-dioxo-5-[1-phenyl-methylidene]-piperazin-2-ylidenemethyl]-pyridin-3-yloxy}-1-phenyl-ethyl-ammonium trifluoroacetate