反应详情

To a solution of N5-[4-chloro-7-(1-ethylpropyl)-1-prop-2-en-1-yl-1H-benzimidazol-2-yl]-N2,N2,4-trimethylpyridine-2,5-diamine (41 mg, 0.100 mmol) in tetrahydrofuran (1.0 mL) was added borane-tetrahydrofuran complex (1.18 M solution in tetrahydrofuran, 0.17 mL, 0.200 mmol) at 0° C. After 2 hr, additional borane-tetrahydrofuran complex (1.18 M solution in tetrahydrofuran, 0.17 mL, 0.200 mmol) was added to the mixture. After 1 hr, additional borane-tetrahydrofuran complex (1.18 M solution in tetrahydrofuran, 0.17 mL, 0.200 mmol) was added to the mixture. After 1 hr, sodium peroxyborate tetrahydrate (154 mg, 1.00 mmol) and water (0.50 mL) was added to the mixture, which was stirred at room temperature for 60 hr. Water was added and the mixture was extracted with ethyl acetate. Organic layer was washed with brine, dried over sodium sulfate and concentrated in vacuo. The residue was purified by flash chromatography on silica gel eluting with a 50-100% ethyl acetate/n-hexane gradient mixture. The filtrate was concentrated in vacuo to give the title compound (23 mg, 0.0535 mmol, 53%) as a colorless solid.

1. waitAfter 1 hr
2. waitAfter 1 hr
3. extractionthe mixture was extracted with ethyl acetate
4. washOrganic layer was washed with brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated in vacuo
7. customThe residue was purified by flash chromatography on silica gel eluting with a 50-100% ethyl acetate/n-hexane gradient mixture
8. concentrationThe filtrate was concentrated in vacuo