反应详情

A mixture of 556 mg of N-[2-(3,4-dimethoxyphenyl)-ethyl]-α-{2-chloro-4-[2-(ethoxycarbonylamino)propionyl]phenoxy}acetamide [prepared as described in step (c) above] and 723 mg of hydrazine hydrate in 7 ml of butanol was heated under reflux for 67 hours. At the end of this time, the mixture was cooled, and the butanol used as the solvent was removed by evaporation under reduced pressure. The residue was purified by column chromatography through silica gel eluted with a 10:1 by volume mixture of chloroform and methanol, to give 112 mg of the title compound as a white powder melting at 167°-169° C. (with decomposition).

1. temperaturewas heated
2. temperatureunder reflux for 67 hours
3. temperatureAt the end of this time, the mixture was cooled
4. customwas removed by evaporation under reduced pressure
5. customThe residue was purified by column chromatography through silica gel
6. washeluted with a 10:1 by volume mixture of chloroform and methanol