反应详情

Sodium bicarbonate (12.6 g) was dissolved in distilled water (250 ml) and tyramine (20.6 g) added. The resulting suspension was heated to boiling to dissolve the tyramine, then cooled to room temperature. Benzyl chloroformate (25.6 g) was added while stirring and with occasional vigorous shaking. After stirring and shaking for an additional 1.5 hours, the precipitate was filtered off and washed with distilled water. The solid was dissolved in ether (250 ml) and washed with distilled water. The organic layer was dried over MgSO4 and evaporated in vacuo to give a residue which solidified upon cooling. Recrystallization from ether/hexane gave the desired product as colourless crystals, m.p. 96°-98° C.

1. temperatureThe resulting suspension was heated
2. stirringAfter stirring
3. stirringshaking for an additional 1.5 hours
4. filtrationthe precipitate was filtered off
5. washwashed with distilled water
6. dissolutionThe solid was dissolved in ether (250 ml)
7. washwashed with distilled water
8. dry with materialThe organic layer was dried over MgSO4
9. customevaporated in vacuo
10. customto give a residue which
11. temperatureupon cooling
12. customRecrystallization from ether/hexane