反应详情

10.6 g (51.4 mmol) of 3-(3,4-dimethyl-phenyl)-3-oxo-propionic acid methyl ester was heated with 12.4 g (103 mmol) of trimethyl orthoacetate and 5.51 g (54.0 mmol) of acetic anhydride at 115° C. for 3 days. The mixture was evaporated and combined with 4.69 mL (51.4 mmol) of aniline. Yield: 8.60 g of a yellow solid (after flash chromatography contains inseparable 3-(3,4-dimethyl-phenyl)-3-oxo-propionic acid methyl ester): LC-MSD, m/z for C20H21NO3 [M+H]+=324.2; HPLC retention time: 2.1 min.

1. customThe mixture was evaporated