反应详情

To a solution of di-tert-butyl {[((1S)-2-[(5-amino-1-methyl-1H-pyrazol-4-yl)amino]-1-{[(tert-butoxycarbonyl)amino]methyl}-2-oxoethyl)amino]methylylidene}biscarbamate (1.72 g) in dichloromethane (17 ml) was added trityl chloride (931 mg). To the mixture was added triethylamine (0.53 ml) dropwise. The mixture was stirred at room temperature for 1 hour. The reaction mixture was dissolved in ethyl acetate. The solution was washed with water and brine. The extract was dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography on silica gel to give di-tert-butyl {(Z)-[((1S)-{[(tert-butoxycarbonyl)amino]methyl}-2-{[1-methyl-5-(tritylamino)-1H-pyrazol-4-yl]amino}-2-oxoethyl)amino]methylylidene}biscarbamate (2.25 g).

1. washThe solution was washed with water and brine
2. dry with materialThe extract was dried over anhydrous magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe residue was purified by column chromatography on silica gel