(6S)-[(4-{[(3-benzylamino-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine-6-carbonyl)-amino]-methyl}-phenyl)-imino-methyl]-carbamic acid tert-butyl ester 、
(6S,8R)-alIyl-{8-amino-6-[4-(benzyloxycarbonylamino-imino-methyl)-benzylcarbamoyl]-8-methyl-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-3-yl}-carbamic acid benzyl ester 、
丙酮 、
三乙酰氧基硼氢化钠 以yielded 8.9 mg (28.1%) of 27a的产率得到(6S,8R)-allyl-{6-[4-(benzyloxycarbonylamino-imino-methyl)-benzylcarbamoyl]-8-isopropylamino-8-methyl-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidin-3-yl}-carbamic Acid Benzyl Ester