2-Hydroxyisobutyric acid → 2-{4-[4-(2-Hydroxy-2-methylpropionyl)piperazin-1-yl]anilino}-4-(1-isopropyl-2-methyl-1H-imidazol-5-yl)-5-chloropyrimidine

2-Hydroxyisobutyric acid (162 mg. 1 mmol) was added to a solution of 1,1′-carbonyldiimidazole (162 mg. 1 mmol) in DCM (4 ml) and stirred at room temperature for 15 minutes. A solution of 2-[4-(piperazin-1-yl)anilino]-4-(1-isopropyl-2-methyl-1H-imidazol-5-yl)-5-chloropyrimidine (Example 34. 400 mg. 0.97 mmol) in DCM (8 ml) was added and stirring continued for 19 hours. DCM (25 ml) was added and the organic layer was washed with 5% (v/v) acetic acid (15 ml), water (15 ml), brine (15 ml) and dried before evaporating under reduced pressure. Chromatography on silica gel with MeOH:DCM (4:96 to 8:92) gave the title compound, after ether trituration, as a solid. (67 mg 14%). NMR: (500 MHz) 1.30 (d, 6H), 1.34 (d, 6H), 2.48 (s, 3H), 3.04 (t, 4H), 3.62 (b s, 4H), 4.00 (b s, 4H), 4.79 (septuplet, 1H), 5.41 (s, 1H), 6.90 (d, 2H), 7.22 (s, 1H), 7.48 (d, 2H), 8.51 (s, 1H), 9.49 (s, 1H); m/z 498.

1. stirringstirring
2. waitcontinued for 19 hours
3. washthe organic layer was washed with 5% (v/v) acetic acid (15 ml), water (15 ml), brine (15 ml)
4. customdried
5. custombefore evaporating under reduced pressure

ORD-Eintrag

ord-123e26babaa3436aac17aa9f7ee05db5

Quelldatensatz

uspto-grants-2010_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07655652B2