反应详情

Trifluoroacetic Acid (20 ml) added to a mixture of Water (2 ml) and 7-((3aS,4R,6R,6aR)-6-(((3-(2-(5-bromo-1H-benzo[d]imidazol-2-yl)ethyl)cyclobutyl)(methyl)amino)methyl)-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl)-N-(2,4-dimethoxybenzyl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine (0.9 g, 1 mmol) at RT. The reaction mixture was stirred for one hour, Triethylsilane (0.39 ml, 2.4 mmol) was added. The volatiles were removed in vacuo and resulting residue was purified twice by flash chromatography (DCM/7N NH3 in MeOH 87:13). The residue was taken up in MeOH/H2O (5:0.5 ml) and K2CO3 (100 mg) added. The mixture was stirred for 1 hour, then concentrated and purified by flash chromatography (DCM/7N NH3 in MeOH 87:13) to give the desired product (0.15 g) as an off-white foam/gum. cyclobutyl)(methyl)amino)methyl)cyclopentane-1,2-diol (0.15 g; 20%) as an off-white foam/gum. MS (ESI+) for C26H32BrN7O2 m/z 554.1 [M+H]+; MS (ESI−) for C26H32BrN7O2 m/z 552.1 [M−H]−; HPLC purity >90% (ret. time, 2.298 min.) 1HNMR (400 MHz, d4-MeOH) δH 8.080 (s, 1H), 7.652 (s, 1H), 7.425-7.403 (m, 1H), 7.342-7.7.312 (m, 1H), 7.232-7.217 (m, 1H), 6.620-6.611 (d, J=3.6 Hz, 1H), 4.358-4.318 (m, 1H), 3.928-3.888 (m, 1H), 3.099-3.039 (m, 0.5H (methine of trans isomer)), 2.898-2.829 (m, 2H), 2.777-2.726 (m, 0.5H (methine of cis isomer)), 2.580-2.529 (m, 1H), 2.453-2.397 (m, 2H), 2.307-2.141 (7H), 2.068-2.017 (m, 1H), 1.955-1.891 (m, 3H), 1.695-1.506 (m, 2H).

1. customThe volatiles were removed in vacuo
2. customresulting residue
3. customwas purified twice by flash chromatography (DCM/7N NH3 in MeOH 87:13)
4. additionK2CO3 (100 mg) added
5. stirringThe mixture was stirred for 1 hour
6. concentrationconcentrated
7. custompurified by flash chromatography (DCM/7N NH3 in MeOH 87:13)