反应详情

To a stirred solution of Intermediate 4 (3.2 g) in ethanol (60 ml) were added hydrazine hydrate (3.71 ml) and palladium on charcoal (5%, 0.1 g). The reaction was stirred for 12 h, before being diluted with ethyl acetate (60 ml). The reaction was extracted with aqueous citric acid (5%, 4×15 ml), and the combined aqueous extracts neutralised with sodium bicarbonate. The aqueous was extracted with ethyl acetate (3 ×15 ml), and the combined organic extracts washed with brine (50 ml), dried over magnesium sulphate (2 g) and the solvent removed in vacuo to yield the title compound as a light brown oil (1.16 g).

1. extractionThe reaction was extracted with aqueous citric acid (5%, 4×15 ml)
2. extractionThe aqueous was extracted with ethyl acetate (3 ×15 ml)
3. washthe combined organic extracts washed with brine (50 ml)
4. dry with materialdried over magnesium sulphate (2 g)
5. customthe solvent removed in vacuo