1,1-dimethylethyl ((3S,4R)-1-{[(6R)-3-fluoro-8-oxo-5,6-dihydro-8H-[1,4]oxazino[2,3,4-de]-1,5-naphthyridin-6-yl]methyl}-3-hydroxy-4-piperidinyl)carbamate 在
7-fluoro-2-(methyloxy)-8-{[(2S)-2-oxiranylmethyl]oxy}-1,5-naphthyridine 作用下,
以
1,4-二氧六环 、
二氯甲烷 为溶剂,
反应 0.5h,
以100%的产率得到(6R)-6-{[(3S,4R)-4-amino-3-hydroxy-1-piperidinyl]methyl}-3-fluoro-5,6-dihydro-8H-[1,4]oxazino[2,3,4-de]-1,5-naphthyridin-8-one dihydrochloride