反应详情

A mixture of tert-butyl 4-((1R)-1-(5-(6-(bis(4-methoxybenzyl)amino)-2-methyl-4-pyrimidinyl)-6-fluoro-3-pyridinyl)ethyl)-1-piperazinecarboxylate (0.57 g, 0.87 mmol) in CH2Cl2 (4.3 mL) at 0° C. was treated with TFA (1.29 mL, 17.36 mmol). The reaction mixture was allowed to warm up to RT. After 90 minutes the reaction mixture was concentrated and the residue was dissolved in CH2Cl2 and saturated NaHCO3 (aq.). The layers were separated and the aqueous layer was extracted with CH2Cl2 (2×). The combined organic layers were dried over anhydrous Na2SO4, filtered and concentrated to give 6-(2-fluoro-5-((1R)-1-(1-piperazinyl)ethyl)-3-pyridinyl)-N,N-bis(4-methoxybenzyl)-2-methyl-4-pyrimidinamine (0.41 g, 0.74 mmol, 85% yield). m/z (ESI, +ve) 557.2 (M+H)+. 1H NMR (400 MHz, CDCl3) δ 8.41 (dd, J=9.29, 2.45 Hz, 1H); 8.14-8.18 (m, 1H); 7.18 (d, J=7.43 Hz, 4H); 6.86 (d, J=8.61Hz, 4H); 6.83 (br. s, 1H); 4.74 (br. s., 4H); 3.79 (s, 6H); 3.57 (q, J=6.78 Hz, 1H); 2.96 (m, 4H); 2.62 (s, 3H); 2.57 (br. s., 2H); 2.44-2.51 (m, 2H); 1.40 (d, J=6.85 Hz, 3H).

1. concentrationAfter 90 minutes the reaction mixture was concentrated
2. dissolutionthe residue was dissolved in CH2Cl2
3. customThe layers were separated
4. extractionthe aqueous layer was extracted with CH2Cl2 (2×)
5. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
6. filtrationfiltered
7. concentrationconcentrated