Ethyl 8-fluoro-4-hydroxy-2-oxo-2',3',5',6'-tetrahydro-spiro[naphthalene-1,4'-pyran]-3-carboxylate 、
甘氨酸叔丁酯盐酸盐 、
N,N-二异丙基乙胺 在
ethyl acetate n-hexane 作用下,
以
1,4-二氧六环 为溶剂,
反应 10.0h,
以to afford a white solid (1.9 g)的产率得到1,1-dimethylethyl N-((8-fluoro-4-hydroxy-2-oxo-2',3',5',6'-tetrahydro-spiro[naphthalene-1,4'-pyran]-3-yl)carbonyl)glycinate