(S)-3-{[8-(3-Amino-propoxy)-4-oxo-4H-quinolizine-2-carbonyl]-amino}-2-benzenesulfonylamino-propionic Acid Trifluoroacetic Acid Salt 、 (S)-2-benzenesulfonylamino-3-{[8-(5-tert-butoxycarbonylamino-pentyloxy)-4-oxo-4H-quinolizine-2-carbonyl]-amino}-propionic acid tert-butyl ester 、
三氟乙酸 以
二氯甲烷 为溶剂,
以to afford compound XXXIV (34 mg, 86%) as a yellow solid which的产率得到(S)-3-{[8-(5-Amino-pentyloxy)-4-oxo-4H-quinolizine-2-carbonyl]-amino}-2-benzenesulfonylamino-propionic acid trifluoroacetic acid salt