反应详情

3.5 g of methyl 3-nitro-4-(3-methoxy-phenoxy)-5-[2-(tetrahydro-pyran-2-yloxy)-ethoxy]-benzoate were dissolved in methanol (100 ml), treated with 0.5 g of Ra-Ni catalyst and hydrogenated at room temperature for 1 hour. The catalyst was filtered off and the solution was concentrated on a rotary evaporator. There was thus obtained the desired methyl 3-amino-4-(3-methoxy-phenoxy)-5-[2-(tetrahydro-pyran-2-yloxy)-ethoxy]-benzoate as a pale yellow solid.

1. filtrationThe catalyst was filtered off
2. concentrationthe solution was concentrated on a rotary evaporator