1-(4,4-Dimethyl-2-oxo-1,3-oxazolidin-3-yl)-2-fluoro-5-methylhex-4-ene-1,3-dione 、 在
(2S,6s)-2,6-二-叔丁基-2,3,5,6-四氢-1H-咪唑并[1,2-a]咪唑 作用下,
以
二氯甲烷 为溶剂,
反应 60.17h,
以92%的产率得到3-ethylpentan-3-yl N-[(1R,2R)-2-(4,4-dimethyl-2-oxo-1,3-oxazolidine-3-carbonyl)-2-fluoro-1-(4-methoxyphenyl)-5-methyl-3-oxohex-4-enyl]carbamate