反应详情

A solution of 3-hydroxy-4-methoxybenzaldehyde (400 g, 2.63 mole)and bromomethylcyclopropane (426 g, 3.2 mole) in 1 L dimethylformamide (DMF) was stirred with potassium carbonate (K2CO3) (483 g, 3.5 mole) at 55° C. for 3.5 h. Then, 1 L of water was added, the mixture chilled on ice, and Intermediate 1 filtered as a white solid, (535 g, 99%). m/z 207 (MH+).

1. filtrationfiltered as a white solid, (535 g, 99%)