反应详情

Into an ice cold solution of 4-hydroxy-2-oxo-1-pyrrolidineacetic acid (0.95 g) and 1-(2-aminoacetyl)-2,2-dimethyl-4-imidazolidinone (1 g) in dimethylsulfoxide (30 ml) a solution of DCC (1,22 g) in tetrahydrofuran (10 ml) was added dropwise. The solution was stirred at room temperature overnight and then heated at 50° for 4 hours. After cooling the solution was diluted with water and the resulting precipitate was filtered off. The filtrate was evaporated to dryness under vacuum. The residue was dissolved in water and eluted on a column of Amberlite IR 120H (20 ml). The eluate was treated with Amberlite IRA 68 (10 ml), filtered and evaporated under vacuum. The residue was triturated with isopropanol to yield 0.4 g of the title compound, m.p. 227°-229° .

1. temperatureheated at 50° for 4 hours
2. temperatureAfter cooling the solution
3. filtrationthe resulting precipitate was filtered off
4. customThe filtrate was evaporated to dryness under vacuum
5. dissolutionThe residue was dissolved in water
6. washeluted on a column of Amberlite IR 120H (20 ml)
7. additionThe eluate was treated with Amberlite IRA 68 (10 ml)
8. filtrationfiltered
9. customevaporated under vacuum
10. customThe residue was triturated with isopropanol