反应详情

A solution of 0.120 g (purity: 76% corresponds to 0.25 mmol) of (R)-4-[3-((S)-4-hydroxy-6-aza-spiro[2.5]oct-6-yl)-propyl]-2-methyl-[1,4]diazepan-5-one dihydrochloride (example 1E) in 2 ml N,N-dimethylformamide was treated at room temperature with 0.052 g (0.27 mmol, 1.1 eq.) of 3,4-dichlorophenyl isocyanate and 0.136 ml (1.24 mmol, 5 eq.) of 4-methylmorpholine. The reaction was stirred at room temperature overnight. To the solution was added 5 mg (0.02 mmol, 0.1 eq.) of 3,4-dichlorophenyl isocyanate. After 1 h, no starting material was left; the solution was slowly added to a solution of sat. aq. sodium hydrogencarbonate, followed by extraction with ethyl acetate (3 times). The organic phases were washed with a solution of sat. aq. sodium hydrogencarbonate and with 10% aq. sodium chloride solution. The combined organic phases were dried over Na2SO4 and the solvent was removed under vacuum. The crude product was purified by flash chromatography (20 g SiO2-column, dichloro-methane/methanol 2:98, 5:95, 1:9, 1:4) to give 0.061 g (51%) of the title compound as white solid. MS: 483.4 (MH+, 2Cl).

1. waitAfter 1 h
2. waitno starting material was left
3. extractionfollowed by extraction with ethyl acetate (3 times)
4. washThe organic phases were washed with a solution of sat. aq. sodium hydrogencarbonate and with 10% aq. sodium chloride solution
5. dry with materialThe combined organic phases were dried over Na2SO4
6. customthe solvent was removed under vacuum
7. customThe crude product was purified by flash chromatography (20 g SiO2-column, dichloro-methane/methanol 2:98, 5:95, 1:9, 1:4)