Aurora kinase modulators and method of use
A solvate, stereoisomeric technology for compounds and compositions that modulate Aurora kinases, control cell proliferation and treat cancer
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Embodiment 1
[0366]
[0367] Synthesis of 2-chloro-4-(2-chloro-pyridin-3-yl)-[1,3,5]triazine
[0368] Preparation of step 1.2-chloro-nicotinamide
[0369] 2-Chloro-3-cyanopyridine (5.0 g, 36 mmol) was dissolved in anhydrous EtOH (100 mL) at 0 °C. HCl was bubbled through the mixture for 3 h, the mixture was sealed and centrifuged (ca. 8° C.) overnight. After concentration, the residue was stirred with ammonium acetate (5.5 g) in 100 mL of IpOH. After 12h, with concentrated NH 4 OH solution, adjust the pH to 9 (from 4), and continue stirring for 2 more days. The mixture was concentrated and subjected to flash chromatography (10:1:0.1 CH 2 Cl 2 / MeOH / NH 4 OH) purification. Trituration in hot tBuOMe / IpOH removed some residual amide by-product to give the product as a white solid.
[0370] Step 2: Amino-(2-chloro-pyridin-3-yl)-methylcyanamide
[0371] 2-Chloro-nicotinamidine was suspended in 10 mL of IpOH with 500 mg of solid cyanamide, and the stirred solid was passed through t...
Embodiment 2
[0375]
[0376] Synthesis of [4-(2-chloro-pyridin-3-yl)-[1,3,5]triazin-2-yl]-methyl-amino
[0377] To a solution of 2-chloro-4-(2-chloro-pyridin-3-yl)-[1,3,5]triazine (10.0 g, 44.0 mmol) in 55 ml of dichloromethane at 0°C was added methylamine (45ml, 88.0mmol) in 2.0M THF. After stirring at room temperature for 18 h, the mixture was diluted with acetone, filtered through a pad of silica gel, and concentrated to give the desired product. MS m / z=222[M+H] + . C 9 h 8 ClN 5 Calculated value: 221.65.
Embodiment 3
[0379]
[0380] Synthesis of 4-(2-chloro-pyridin-3-yl)-pyrimidine
[0381] Step 1. Preparation of 1-(2-chloro-pyridin-3-yl)-3-dimethylamino-propenone
[0382] In a drying tube at 85°C, 1-(2-chloro-pyridin-3-yl)-ethanone (21.7g, 139mmol) was dissolved in 46mL N,N-dimethylformamide dimethylacetal (42g, 350mmol ) for 1.5h, then concentrated. The residue was purified by suction filtration chromatography (using 150 g of silica gel in a Buchner funnel, rapidly collecting fractions with 10:1, then 5:1 CH 2 Cl 2 / IpOH) to give the product as a yellow solid. MS m / z=211[M+H] + . C 10 h 11 ClN 2 O calculated value: 210.66.
[0383] Step 2. Preparation of 4-(2-chloro-pyridin-3-yl)-pyrimidine
[0384] Using a 500mL IpOH bath at room temperature as a cold source, at room temperature, N 2 Next, by intermittently adding small pieces of sodium metal (8.3 g, 360 mmol in total) to 400 mL of anhydrous methanol, sodium methoxide was generated over 1.5 hours. Formamidine acetate ...
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