(S)-[imino-(4-{[(3-methanesulfonylamino-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carbonyl)-amino]-methyl)-phenyl)-methyl]-carbamic Acid tert-butyl Ester 、
(S)-[(4-{[(3-diethylamino-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carbonyl)-amino]-methyl}-phenyl)-imino-methyl]-carbamic acid tert-butyl ester 、
4-(三氟甲氧基)苯磺酰氯 以yielded 31.7 mg (41.6%) of 33a的产率得到(S)-{imino-[4-({[4-oxo-3-(4-trifluoromethoxy-benzenesulfonylamino)-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carbonyl]-amino}-methyl)-phenyl]-methyl}-carbamic acid tert-butyl ester