Reaction Steps
N-(2,4-dimethoxybenzyl)-7-((3aS,4R,6R,6aR)-2,2-dimethyl-6-((methyl(3-(2-(5-(1-methylcyclobutyl)-1H-benzo[d]imidazol-2-yl)ethyl)cyclobutyl)amino)methyl)tetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine (128 mg, 0.17 4 mmol) was dissolved in a mixture of Trifluoroacetic Acid (3.60 ml, 46.7 mmol) and Water (0.4 ml, 20 mmol) which had been pre-cooled at 0° C. in an ice bath. The solution was stirred at 0° C. for 30 minutes, then the ice bath was removed and the mixture was warmed to RT at which this temperature was maintained for a further 2.5 hours. The reaction mixture was concentrated in vacuo. The residue was taken up in 3 ml MeOH and concentrated and the process was repeated twice. The resultant white residue was placed on high vacuum. The crude residue was combined with another batch of crude material (prepared identically, ˜⅓ of the amount used in this reaction), diluted with 5 mL MeOH, treated with 140 mg K2CO3, 10 drops of H2O and allowed to stir at RT till the solution was basic by pH paper. The mixture was filtered and the solids were washed with 15 ml MeOH. The solution was concentrated to an oil that was placed on high vacuum. The crude material was purified by flash chromatography (SiO2, eluting with 10-15% 7N NH3 in CH3OH/CH2Cl2 to yield the desired product as glass/stiff foam (68 mg). 1H NMR (400 MHz, MeOD) δH ppm 8 06 (s, 1H), 7.39 (d, J=7.88 Hz, 1H), 7.23 (s, 1H), 7.21 (dd, J=3.63, 1.76 Hz, 1H), 6.99 (m, 1H), 6.60 (d, J=3.52 Hz, 1H), 4.93 (m, 1H), 4.32 (m, 1H), 3.89 (m, 1H), 3.03 (m, 1H), 2.83 (m, 2H), 2.70 (q, J=8.15 Hz, 1H), 2.52 (m, 1H), 2.40 (m, 4H), 2.27 (m, 2H), 2.18 (d, J=6.22 Hz, 3H), 2.11 (m, 4H), 2.03 (m, 1H), 1.86 (m, 4H), 1.62 (m, 1H), 1.51 (m, 1H), 1.47 (s, 3H).
