反应详情

To a solution of 2,4-dimethoxybenzoic acid (4.0 g, 0.022 mol) in chloroform (60 ml) was added bromine (1.13 ml, 0.022 mol) in chloroform (20 ml) dropwise. After stiring overnight at room temperature the precipitate was filtered off and dried to afford the title compound as a white solid (2.87 g).

1. filtrationthe precipitate was filtered off
2. customdried