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CAS No. : | 3304-70-9 | MDL No. : | MFCD00051338 |
Formula : | C7H8N2O4 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | CUIWFAXEALIQJS-UHFFFAOYSA-N |
M.W : | 184.15 | Pubchem ID : | 76810 |
Synonyms : |
|
Num. heavy atoms : | 13 |
Num. arom. heavy atoms : | 5 |
Fraction Csp3 : | 0.29 |
Num. rotatable bonds : | 4 |
Num. H-bond acceptors : | 5.0 |
Num. H-bond donors : | 1.0 |
Molar Refractivity : | 41.15 |
TPSA : | 81.28 Ų |
GI absorption : | High |
BBB permeant : | No |
P-gp substrate : | No |
CYP1A2 inhibitor : | No |
CYP2C19 inhibitor : | No |
CYP2C9 inhibitor : | No |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | No |
Log Kp (skin permeation) : | -7.12 cm/s |
Log Po/w (iLOGP) : | 1.41 |
Log Po/w (XLOGP3) : | 0.43 |
Log Po/w (WLOGP) : | -0.02 |
Log Po/w (MLOGP) : | -0.72 |
Log Po/w (SILICOS-IT) : | 0.67 |
Consensus Log Po/w : | 0.35 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 1.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -1.27 |
Solubility : | 9.82 mg/ml ; 0.0533 mol/l |
Class : | Very soluble |
Log S (Ali) : | -1.7 |
Solubility : | 3.64 mg/ml ; 0.0198 mol/l |
Class : | Very soluble |
Log S (SILICOS-IT) : | -1.39 |
Solubility : | 7.52 mg/ml ; 0.0408 mol/l |
Class : | Soluble |
PAINS : | 0.0 alert |
Brenk : | 1.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 1.98 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H332-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With thionyl chloride; at -9℃;Reflux; | 100 ml of methanol was added into 1H-imidazole-4,5-dicarboxylic acid (10 g, 64 mmol, 1 eq), and then the mixture was cooled to -9 C. in a low temperature cooler and added with thionyl chloride (5 to 10 eq). The mixture was then heated gradually to a reflux temperature and refluxed with stirring over-night, until it turned from a white turbid solution into a colorless transparent liquid. The solvent was then removed from the mixture by a rotary evaporator with a water pump in a water bath of 40 C. and thereby a white solid was obtained. The solid was washed with a dilute aqueous solution of sodium hydroxide and dried in an oven at 40 C. to obtain a product (dimethyl 1H-imidazole-4,5-dicarboxylate). 1HNMR (DMSO, 500 MHz): delta 8.057 (1H,s), delta 3.815 (6H,s). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With ammonia; at 10 - 120℃; | Dimethyl 1H-imidazole-4,5-dicarboxylate (8 g, 43 mmol) was added with about 50 to 100 ml of ammonia solution. The mixture was stirred at 10 to 120 C. for 2 to 24 hours. A large amount of white solid was precipitated. After filtration, the filter cake was washed with 50 ml of water and then washed with 50 ml of ethanol, and dried at 40 C. in an oven to obtain a product. 1HNMR (DMSO, 500 MHz): delta 10.437 (1H,s), delta 9.043 (2H,s), delta 7.769 (1H,s), delta 7.681 (2H, s) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | With hydrazine; In methanol; at 115℃; for 4.5h;Heating / reflux; | lH-Imidazole-4,5-dicarboxylic acid dimethyl ester (592 mg, 3.21 mmol) is combined with hydrazine (600 mg, 18.8 mmol) and MeOH (10 mL). The reaction mixture is heated to 115C for 30 min. Cool and filter off the resulting precipitate. Wash with additional water. Combine the precipitate with hydrazine (1.38 mL) and reflux for 4 h. Pour the reaction mixture into ice water and adjust the to pH 2 with HCl (12 N). The new precipitate is isolated by filtration to afford the title product (293 mg, 60%) 1H NMR (400 MHz, DMSO-^6) delta 11.41 (br. s., 1.47 H), 8.27 (s, 1 H), 3.37 (br. s., 6.2 2H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
87% | With bromine; potassium carbonate; In dichloromethane; acetonitrile; at 20℃; for 12h; | a) dimethyl 2-bromo-1H-imidazole-4,5-dicarboxylate 9.50 g bromine in 100 ml dichloromethane are added dropwise to a mixture of 9.90 g methyl 1H-imidazole-4,5-dicarboxylate and 7.46 g potassium carbonate in 200 ml dichloromethane and 80 ml acetonitrile. The mixture is stirred for 12 h at ambient temperature in the dark and then added to a saturated aqueous solution of sodium thiosulphate and sodium chloride. The organic phase is separated off and the aqueous phase is extracted several times with ethyl acetate. The combined organic phases are dried over sodium sulphate and the solvent is removed. Yield: 12.31 g (87% of theory) Mass spectrum (ESI+): m/z=263/265 (Br) [M+H]+ |
87% | With bromine; potassium carbonate; In dichloromethane; acetonitrile; at 20℃; for 2h; | At ambient temperature 9.50 g (59.45 mmol) bromine were added dropwise to a solution of 9.90 g (53.76 mmol) <strong>[3304-70-9]dimethyl imidazole-4,5-dicarboxylate</strong> in 300 ml dichloromethane and 80 ml acetonitrile. 7.46 g (54.00 mmol) potassium carbonate was added, and the reaction mixture was stirred for 2 hours at ambient temperature. Then the dichloromethane was eliminated using the rotary evaporator and the residue was combined with a saturated solution of sodium chloride and sodium thiosulphate. It was extracted ten times with ethyl acetate, the organic extracts were dried over sodium sulphate and then the solvent was eliminated. Yield: 12.31 g (87% of theory) C7H7BrN2O4 (263.05) Mass spectrum: (M+H)+=263/265 (bromine) |
46% | With bromine; potassium carbonate; In dichloromethane; at 20℃; for 1h; | EXAMPLE VI Dimethyl 2-bromo-1H-imidazole-4.5-dicarboxylate 6.11 ml bromine are added to 19.80 g dimethyl 1H-imidazole4,5-dicarboxylate and 14.92 g potassium carbonate in 600 ml methylene chloride. The reaction mixture is stirred for one hour at ambient temperature, then a mixture of saturated sodium sulphite solution and saturated sodium chloride solution (1:1) is added. The organic phase is largely separated off and the aqueous phase is extracted with ethyl acetate several times. The combined organic phases are dried over magnesium sulphate and evaporated down, leaving about 7.40 g crude product. The aqueous phase is combined with ethyl acetate and extracted overnight in an extraction apparatus. The ethyl acetate extract is evaporated down and the flask residue is combined with the crude product already obtained. Yield: 13.10 g (46% of theory) Mass spectrum (ESI+): m/z=263, 265 [M+H]+ |
With bromine; potassium carbonate; In dichloromethane; acetonitrile; at 20℃; for 2h; | To a solution of dibutyl 1H-imidazole-4,5-dicarboxylate (Step 36.1) (20 g, 74.5 mmol) in CH2CI2 (250 mL) and ACN (83 mL) were added successively K2003 (11.33 g, 82 mmol) then dropwise bromine (4.22 mL, 82 mmol). The resulting mixture was stirred 1 hr at RT. The reaction mixture was poured onto aq. Na25203 solution and extracted with CH2CI2. Combined extracts were washed with brine, dried over Mg504, filtered and concentrated under reduced pressure to afford the title product (27.1 g, 74.1 mmol, 99 % yield) as a yellow oil. tR: 1.09 mm (LC-MS 2); ESl-MS: 347/349 [M+H] ESl-MS: 345/347 [M-H] (LC-MS 2); TLC (EtOAc/heptane 1:1) Rf =0.39.The title compound was prepared in analogy to the procedure described in Step 36.2 using methyl 1 H-imidazole-4,5-dicarboxylate at RT for 2 hr. The reaction mixture was quenched with a minimum volume of aq. Na25203 solution and the yellow suspension was filtered and the filtrate was concentrated under reduced pressure. About 30-40 % of the total amount of product was obtained. Most of the product had crystallized and required repeated dissolution with hot THFMeOH 4:1 mixture (500 mL). The extraction from a saturated aq. phase was producing even less product. The individual extracted batches, probably containing some KBr salt, were combined and dried under reduced pressure. The residual salt was always checked after each treatment with THF-MeOH if still some product was present. It required 4 extraction cycles to remove the polar and poorly soluble product from the inorganic salts. TLC (CH2CI2/MeOH 10:1) Rf= 0.42. | |
8.3 g | With N-Bromosuccinimide; In acetonitrile; at 50℃; for 4h; | (1) Dimethyl 1H-imidazole-4,5-dicarboxylate (9.6 g, 52 mmol) was dissolved in acetonitrile (200 mE), and N-bromosuccinimide (13.92 g, 78 mmol) was added thereto, and then the mixture was stirred at 50 C. for 4 hours. After the reaction, water was added and the mixture was extracted twice with ethyl acetate. After being washed with saturated aqueous sodium thiosulfate and saturated aqueous sodium chloride, the organic layer was dried over anhydrous sodium sulfate. The organic layer was concentrated to obtain dimethyl 2-bromo-1H-imidazole-4,5-dicarboxylate (8.3 g). This material was used as is in the next reaction without further purification:10217] ?H-NMR (CDC13) oe: 10.56 (1H, s), 3.96 (6H, s);10218] ESI-MS mlz=263 (M+H). |
With bromine; In water; at 60℃; for 1h; | To a solution of <strong>[3304-70-9]dimethyl 1H-imidazole-4,5-dicarboxylate</strong> (1.58g) in water (15mL), was added bromine (4.11g). The mixture was stirred at 60C for Ihr.The solvent was evaporated in vacuo and the residue was triturated with ether to give the target compound (2.35g) as a solid.NMR (DMSO-d6) : d 3.81(6H, s).MASS m/z : 286 (M-l). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With dmap; In tetrahydrofuran; for 16h; | 1H-Imidazole-4,5-dicarboxylic acid dimethyl ester (2 g, 10.87 mmol, 1 equiv.) was dissolved in THF (55 mL, 0.2 M) and DMAP (1.46 g, 11.95 mmol, 1.1 equiv.) before Di-tert-butyl dicarbonate (3.50 g, 16.29 mmol, 1.4 equiv. ) was added. The reaction was stirred for 16 hours before being quenched with saturated NH4C1 (30 mL) and extracted with ethyl acetate (2 x 30 mL) and the organic layer washed several times with water (4 x 30 mL), brine solution (50 mL). It was dried over Na2S04, filtered and concentrated in vacuo. Imidazole-1,4,5-tricarboxylic acid 1-tert- butyl ester 4,5-dimethyl ester 252 (3.85 g, 100%, 10.87 mmol). ¹H NMR (300 MHz) CDC13 No. 8.02 (s, 1 H), 3.99 (s, 3 H), 3.92 (s, 3 H). MS: 306.8 (M+23). TLC Rf: 0.6 Hexanes/ Ethyl acetate (1/1) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
90% | With hydrogenchloride; sodium iodide; In methanol; for 16h; | 1H-Imidazole-4,5-dicarboxylic acid dimethyl ester (1.5 g, 8.15 mmol, 1 equiv. ) was dissolved in MeOH (10 mL) and benzyl bromide (1.16 mL, 9.77 mmol, 1.1 equiv.) before sodium hydride (360 mg, 1.1 equiv., 60% dispersion) and sodium iodide (200 mg) was added. The reaction was stirred for 16 hours before being quenched with saturated NH4Cl (30 mL) and extracted with ethyl acetate (2 x 30 mL) and the organic layer washed several times with water (4 x 30 mL), brine solution (50 mL). It was dried over Na2S04, filtered and concentrated in vacuo. 1-Benzyl-1H- imidazole-4,5-dicarboxylic acid dimethyl ester 254 (2.01 g, 90 %, 7.33 mmol). ¹H NMR (300 MHz) CDC13 No. 7.58 (s, 1 H), 7.33 - 7.42 (m, 3 H), 7.14 - 7.18 (m, 2 H), 5.41 (s, 2 H), 3.92 (s, 3 H), 3.84 (s, 3 H). MS: 275.1 (M+1) |
75.9% | Imidazole-dicarboxylic acid dimethylester (5.1 g, 0.03 mol) was stirred in MeOH (150 ml). To this suspension, Na (680 mg, 0.03 mol) was added. When all solids were dissolved benzylbromide (4.8 g, 0.02 mol) was added, the mixture was heated at reflux for 16 hours. After evaporating MEOH, the residue was dissolved in CH2CI2 and stirred with silica-gel. When the silica was removed by filtration and the solvent was evaporated, the solid was purified over a short silica column to afford the title compound (8.84g, 75.9%). |
Tags: 3304-70-9 synthesis path| 3304-70-9 SDS| 3304-70-9 COA| 3304-70-9 purity| 3304-70-9 application| 3304-70-9 NMR| 3304-70-9 COA| 3304-70-9 structure
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