反应详情

2-[4-(2-Benzyloxyacetylamino)-phenoxy]-propionic acid methyl ester 51 (15 gm, 43.7 mmol) was dissolved in methanol (150 ml) in a pressure vessel. Palladium on carbon (5%, 8 g) was added and the mixture stirred under a hydrogen atmosphere (2.5 kg) for 10 hrs. Catalyst was removed by filtration and the methanol distilled off. The crude 52 was recrystallised in chloroform:hexane (1:6) to give pure 52 (4 g, 36.3%) as a white powder with an m.p. between 111-112.6° C.

1. customCatalyst was removed by filtration
2. distillationthe methanol distilled off
3. customThe crude 52 was recrystallised in chloroform:hexane (1:6)