5-benzyloxy-6-[(4-fluoro-phenyl)-hydroxy-methyl]-1-(2-hydroxy-ethyl)-4-oxo-1,4-dihydro-pyridine-2-carboxylic acid 在
钯 氢气 、
甲醇 作用下,
以
甲醇 为溶剂,
以yields 6-[(4-fluoro-phenyl)-hydroxy-methyl]-7-hydroxy-3,4-dihydro-pyrido[2,1-c]-[1,4]oxazine-1,8-dione in the form of colourless crystals的产率得到6-[(4-fluoro-phenyl)-hydroxy-methyl]-7-hydroxy-3,4-dihydro-pyrido[2,1-c]-[1,4]oxazine-1,8-dione