Formaldehyde → 2-(4-(2-(2-((4-(1-Methylpiperidin-4-yl)phenyl)amino)-5-(trifluoro-methyl)pyrimidin-4-yl)ethyl)pyrimidin-5-yl)acetamide

To a suspension of 2-(4-(2-(2-((4-(piperidin-4-yl)phenyl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)pyrimidin-5-yl)acetamide (29) (0.029 g, 0.060 mmol) in anhydrous methanol (2 mL) was added a 37% aq. solution of formaldehyde (0.018 mL, 0.24 mmol) under an atmosphere of nitrogen, followed by sodium triacetoxyborohydride (0.063 g, 0.30 mmol). The reaction was stirred at room temperature for 2.5 hours. The volatiles were removed in vacuo and the residue was diluted with EtOAc (50 mL) and sat. aq. NaHCO3 (30 mL). The layers were separated and the aqueous layer was extracted with EtOAc (2×30 mL), the combined organic layers were washed with water (40 mL), brine (40 mL), dried (MgSO4), filtered and concentrated in vacuo to give a solid which was taken up in DCM (˜10 mL) and methanol (˜1 mL) and concentrated in vacuo. The process was repeated with only DCM twice. The resulting off-white solid was suspended in DCM (5 mL) and cyclohexane was added (˜10 mL). The suspension was sonicated and the product was collected by filtration. The solid was washed with petroleum benzine 40-60° C. (5×10 mL), air-dried and subsequently dried under high-vacuum to give the title compound (30) (0.017 g, 57% yield) as an off-white solid; 1H NMR (400 MHz, d6-DMSO) δ 10.01 (s, 1H), 8.94 (s, 1H), 8.63 (s, 1H), 8.53 (s, 1H), 7.64 (s, 1H), 7.54 (d, J=8.0 Hz, 2H), 7.15 (d, J=8.5 Hz, 2H), 7.11 (s, 1H), 3.57 (s, 2H), 3.28-3.22 (m, 4H), 2.87 (d, J=11.2 Hz, 2H), 2.46-2.36 (m, 1H), 2.20 (s, 3H), 1.98 (t, J=10.6 Hz, 2H), 1.76-1.58 (m, 4H). LCMS Method C: it 4.52 min; m/z 500.1 [M+H]+.

1. customThe volatiles were removed in vacuo
2. additionthe residue was diluted with EtOAc (50 mL) and sat. aq. NaHCO3 (30 mL)
3. customThe layers were separated
4. extractionthe aqueous layer was extracted with EtOAc (2×30 mL)
5. washthe combined organic layers were washed with water (40 mL), brine (40 mL)
6. dry with materialdried (MgSO4)
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customto give a solid which
10. concentrationmethanol (˜1 mL) and concentrated in vacuo
11. additioncyclohexane was added (˜10 mL)
12. customThe suspension was sonicated
13. filtrationthe product was collected by filtration
14. washThe solid was washed with petroleum benzine 40-60° C. (5×10 mL)
15. customair-dried
16. customsubsequently dried under high-vacuum

ORD record

ord-35294b1257a24f5eb8b5b0bfe15b68c2

Source dataset

uspto-grants-2015_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09012461B2