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4-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-3-methoxy-N-(1-methyl-4-piperidyl)benzamide[ No CAS ]
Yield
Reaction Conditions
Operation in experiment
57%
BH3.SMe2 (0.2 niL, 5.0 M in THF, 1 nimol) was added to solution of 4-[[(7/?)-8-cyclopentyl- 7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-3-methoxy-N-(l-methyl-4- piperidyl)benzamide (WO2004076454; 53 mg, 0.1 mmol) in THF (20 niL) and stirred at ambient temperature for 3 h under an atmosphere of nitrogen. After 3 hours, HCl (20 mL, concentrated aqueous) was added and the resulting solution was stirred at ambient temperature for 16 h. The HCl solution was then diluted with water (200 mL), and loaded onto an SCX-2 column. The SCX-2 column was then washed with water (50 mL), then MeOH (50 mL). The crude product was then eluted from the column with NH3 (50 mL, 7M in MeOH), and concentrated under reduced pressure. Purification by column chromatography (SiO2, eluent gradient 0-10% NH3 [7M in MeOH] in DCM) then by preparative HPLC (Xterra prep RPl 8, 19 x 100 mm column, eluting with a gradient composing of MeCN and a 1% solution ofNH3 in water), to give the title compound (29 mg, 57%) as a solid. 1H NMR (400 MHz, CDCl3): deltaH 0.94 (t, 3H), 1.50 - 1.83 (m, 10H), 1.91 - 1.95 (m, IH), 2.08 - 2.11 (m, 3H), 2.36 - 2.38 (m, 2H), 2.43 (s, 3H), 2.74 - 2.77 (m, IH), 2.80 (s, 3H), 3.01 (m, 2H,), 3.06 - 3.09 (m, IH), 3.36 - 3.39 (m, IH), 3.95 (s, 3H), 4.07 (m, IH), 4.88 (m, IH), 5.96 (d, IH), 7.21 - 7.23 (m, IH), 7.30 (s, IH), 7.37 (d, IH), 7.47 (s, IH), 8.53 (d, IH); MS m/z 508 [M+H]+.
0.15 g of the compound Z3, 0.12 g TBTU, 0.12 mL DIPEA are dissolved in 5 mL dichloromethane and stirred for 30 minutes at 25 C. Then 50 mg 1-methyl-4-aminopiperidine are added and the mixture is stirred for a further 2.5 hours at 25 C. stirred. The solution is then extracted with water and then evaporated down. The residue is dissolved in warm ethyl acetate and crystallised using ether and petroleum ether. Yield: 0.025 g white crystals.
With toluene-4-sulfonic acid; In Methyl isobutyl carbinol; for 5.0h;Heating / reflux;
Preparation of the Compound of Example No. 46 by Reacting 4 with 9; A suspension of 201 g (1.06 mol) para-toluenesulphonic acid-hydrate, 209 g (706 mmol) 9 and 183 g (695 mmol) 4 in 800 mL 2-methyl-4-pentanol is refluxed. 100 mL solvent are distilled off. The mixture is refluxed for 3 hours, 200 mL of 2-methyl-4-pentanol are added and 120 mL of solvent are distilled off. After 2 hours heating at reflux temperature a further 280 mL solvent are distilled off. The mixture is cooled to 100 C. and 1 L demineralised water and then 0.5 L ethyl acetate are added to the reaction solution. The organic phase is separated off and the aqueous phase is again washed with 0.5 L ethyl acetate. 1.5 L dichloromethane and 0.5 L ethyl acetate are added to the acidic aqueous phase. The pH value of the aqueous phase is adjusted to pH 9.2 with 260 mL of 6 normal sodium hydroxide solution. The aqueous phase is separated off and the organic phase is washed three times with in each case 1 L of 1 normal aqueous sodium hydrogen carbonate solution. The organic phase is dried over sodium sulphate, filtered and the solvent is evaporated down under reduced pressure. 406 g of crude product are obtained.The crude product is dissolved in 1.5 L ethyl acetate. At a temperature of 50-55 C. 2.5 L of methyl-tert.-butylether are added. The mixture is inoculated at 45 C. and stirred for 16 hours with cooling to ambient temperature. The suspension is stirred for 3.5 hours at 0-5 C. and the precipitate is suction filtered. The filter cake is washed again with methyl-tert.-butylether/ethyl acetate (2:1) and methyl-tert.-butylether. The product is dried at 50 C. in the vacuum drying cupboard. 236 g of crystalline compound of Example no. 46 are obtained as the anhydrate (I).
A suspension of 201 g (1.06 mol) para-toluenesulphonic acid-hydrate, 209 g (706 mmol) 9 and 183 g (695 mmol) 4 in 800 mL 2-methyl-4-pentanol is refluxed. 100 mL solvent are distilled off. The mixture is refluxed for 3 hours, 200 mL of 2-methyl-4-pentanol are added and 120 mL of solvent are distilled off. After 2 hours heating at reflux temperature a further 280 mL solvent are distilled off. The mixture is cooled to 100 C. and 1 L demineralised water and then 0.5 L ethyl acetate are added to the reaction solution. The organic phase is separated off and the aqueous phase is again washed with 0.5 L ethyl acetate. 1.5 L dichloromethane and 0.5 L ethyl acetate are added to the acidic aqueous phase. The pH value of the aqueous phase is adjusted to pH 9.2 with 260 mL of 6 normal sodium hydroxide solution. The aqueous phase is separated off and the organic phase is washed three times with in each case 1 L of 1 normal aqueous sodium hydrogen carbonate solution. The organic phase is dried over sodium sulphate, filtered and the solvent is evaporated down under reduced pressure. 406 g crude product are obtained.
In propan-1-ol; water; at 0 - 70℃; for 3h;Product distribution / selectivity;
46.5 g of the crystalline type I anhydrate described above are dissolved in 310 mL 1-propanol and filtered clear. The mixture is heated to 70 C. and 620 mL demineralised water are added. The solution is left cool to ambient temperature, cooled to 0-10 C. and seed crystals are added. The resulting suspension is stirred for 3 hours at 0-10 C. It is suction filtered and washed with cold 1-propanol/demineralised water (1:2) and demineralised water. The product is dried at 50 C. in the vacuum drying cupboard. 40.5 g crystalline product of the compound of formula (I) are obtained as the monohydrate. The crude product of the reaction described above may also be crystallised directly as the crystalline monohydrate from 1-propanol/demineralised water.
With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine; In dichloromethane; at 25℃; for 3h;Product distribution / selectivity;
0.15 g of the compound 23, 0.12 g TBTU, 0.12 mL DIPEA are dissolved in 5 mL dichloromethane and stirred for 30 minutes at 25C. Then 50 mg l-methyl-4- aminopiperidin are added and the mixture is stirred for a further 2.5 hours at 25C. The solution is then extracted with water and then evaporated down. The residue is dissolved in warm ethyl acetate and crystallised from ether and petroleum ether. Yield: 0.025 g of white crystals. M.p.: 203C as the base.; 0.15 g of the compound Z3, 0.12 g TBTU, 0.12 mL DIPEA are dissolved in 5 mL dichloromethane and stirred for 30 minutes at 250C. Then 50 mg l-methyl-4- aminopiperidin are added and the mixture is stirred for a further 2.5 hours at 25C. The solution is then extracted with water and then evaporated down. The residue is dissolved in warm ethyl acetate and crystallised from, ether and petroleum ether. Yield: 0.025 g of white crystals.
0.15 g of the compound Z3, 0.12 g TBTU, 0.12 mL DIPEA were dissolved in 5 mL dichloromethane and stirred for 30 minutes at 25 C. Then 50 mg 1-methyl-4-aminopiperidin were added and the mixture was stirred for a further 2.5 hours at 25 C. The solution was then extracted with water and then evaporated down. The residue was dissolved in warm ethyl acetate and crystallised from ether and petroleum ether. Yield: 0.025 g of white crystals. M.p.: 203 C. as the base
With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine In N,N-dimethyl-formamide at 25℃; Inert atmosphere;
6.1 Step 1.
To a solution of 4-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H- pteridin-2-yl]amino]-3-rnethoxy-benzoic acid (0.5 g, 1.18 mmol, 1 equiv), l-methylpiperidin-4- amine (134.19 mg, 1.18 mmol, 1 equiv) in DMF (4 mL) was added DIEA (455.64 mg, 3.53 mmol, 614.07 uL, 3 equiv) and EDCI (337.92 mg, 1.76 mmol, 1.5 equiv), HOBt (238.18 mg, 1.76 mmol, 1.5 equiv). The mixture was stirred at 25 °C for 0.5 h. The residue was purified by /?/■3)-ACN]; B%: 32%-62%,llmin) to give compound 4-[[(7R)-8-cyclopentyl-7-ethyl-5- methyl-6-oxo-7H-pteridin-2-yl]amino]-3-methoxy-N-(l-methyl-4-piperidyl)benzamide (0.48 g, 78 % yield) was obtained as a white solid.
With potassium carbonate In N,N-dimethyl-formamide at 50℃; Inert atmosphere;
6.2 Step 2.
To a solution of 4-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H- pteridin-2-yl]amino]-3-methoxy-N-(l-methyl-4-piperidyl)benzamide (250 mg, 479 umol, 1.0 equiv), methyl 2-(bromomethyl)prop-2-enoate (172 mg, 958 umol, 2.0 equiv) in DMF (1 mL) was added K2CO3 (265 mg, 1.92 mmol, 4.0 equiv). The mixture was stirred at 50 °C for 12 h. The residue was purified by />/■- HPLC (column: Waters Xbridge C18 150*50mm*10um; mobile phase: [water (NH4HCO3)-ACN]; B%: 31%-61%,llmin) to give compound methyl 2- [[N-[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]-2-methoxy-4-[(l-methyl-4- piperidyl)carbamoyl] anilino]methyl]prop-2-enoate (0.2 g, 67 % yield) as a white solid.