methyl 3-[5-methyl-oxazol-4-yl]-benzoate 、 Lithium Tert-butyl Acetate 以to give crude 3-[3-(5-methyl-oxazol-4-yl)-phenyl]-3-oxo-propionic acid tert-butyl ester (1.46 g) as a pale-yellow oil的产率得到3-[3-(5-methyl-oxazol-4-yl)-phenyl]-3-oxo-propionic acid tert-butyl ester