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CAS No. : | 3034-50-2 |
Formula : | C4H4N2O |
M.W : | 96.09 |
SMILES Code : | O=CC1=CNC=N1 |
MDL No. : | MFCD00173726 |
InChI Key : | ZQEXIXXJFSQPNA-UHFFFAOYSA-N |
Pubchem ID : | 76428 |
GHS Pictogram: | ![]() |
Signal Word: | Warning |
Hazard Statements: | H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 7 |
Num. arom. heavy atoms | 5 |
Fraction Csp3 | 0.0 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 23.98 |
TPSA ? Topological Polar Surface Area: Calculated from | 45.75 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from | 0.06 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by | -0.14 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from | 0.22 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from | -1.44 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by | 1.2 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions | -0.02 |
Log S (ESOL):? ESOL: Topological method implemented from | -0.81 |
Solubility | 14.9 mg/ml ; 0.155 mol/l |
Class? Solubility class: Log S scale | Very soluble |
Log S (Ali)? Ali: Topological method implemented from | -0.37 |
Solubility | 41.3 mg/ml ; 0.43 mol/l |
Class? Solubility class: Log S scale | Very soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by | -1.1 |
Solubility | 7.69 mg/ml ; 0.08 mol/l |
Class? Solubility class: Log S scale | Soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg | High |
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg | No |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) | No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) | No |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) | No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) | No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) | No |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) | No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from | -6.99 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from | 0.0 |
Ghose? Ghose filter: implemented from | None |
Veber? Veber (GSK) filter: implemented from | 0.0 |
Egan? Egan (Pharmacia) filter: implemented from | 0.0 |
Muegge? Muegge (Bayer) filter: implemented from | 2.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat | 0.55 |
PAINS? Pan Assay Interference Structures: implemented from | 0.0 alert |
Brenk? Structural Alert: implemented from | 1.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from | No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) | 1.0 |
* 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 |
---|---|---|
100% | 12.0 g (124 mmol) 4-formyl-imidazole are placed together with 750 mg Raney nickel in 1000 ml of methanolic ammonia solution and shaken at 40° C. for 30 min. Then the mixture is hydrogenated in a Parr apparatus under a hydrogen atmosphere at 5 bars pressure at 40° C. for 14 h. Another 750 mg Raney nickel are then added and the mixture is again hydrogenated at 50° C. under a hydrogen atmosphere at 5 bars pressure for 14 h. The mixture is filtered, evaporated down i. vac., and in each case methanol, toluene and ethanol are added to the residue and it is again evaporated down completely i. vac. The residue is combined with ethereal hydrochloric acid in methanol and evaporated down completely i. vac. The residue is in each case combined with methanol and dichloromethane and evaporated down completely i. vac.Yield: 21.2 g (quant.)Rt value: 0.49 min (D)C4H7N3*2 HCl (170.04/97.12)Mass spectrum: (M+H)+=98 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With dihydrogen peroxide;pH 7.2;aqueous phosphate buffer; UV-irradiation;Product distribution / selectivity; | Photooxidation; A 1-cm quartz cuvette, filled with 1.4 mL sample, was placed in the parallel beam of a filtered 1000 W xenon arc lamp (Oriel, Stratford, CT). The samples were magnetically stirred during irradiation. To minimize infrared (heat) and visible radiation, the beam was passed through a water filter (7 cm), reflected by a dichroic mirror and filtered through a 1-mm UG11 filter. Short-wave cut off was achieved by passing the beam through WG280, WG305 or WG335 filters with 3 mm thickness each (Schott-Jena, Mainz, Germany). Xenon lamp emission filtered through WG280 included W-C, UV-B and W-A; through WG305 W-B and W-A and through WG335 only W-A was included. Two narrow bands in the W-B and W-A spectral regions were selected to monitor the xenon-arc emission. The probe of a calibrated EGG 550 radiometer (Salem, MA, USA) was equipped with a neutral density filter and narrow band filter type UV-M-IL (Schott-Jena) with a transmission maximum of 21 percent at 303 nm and a half-width of 11.5 nm to monitor UV-B or with a type UV-PIL (Schott-Jena) with a transmission maximum of 46 percent at 363 nm and a half-width of 7.7 nm to monitor UV-A. Transmission spectra of the optical filters were checked on a Perkin Elmer Lambda 40 UV/VIS spectrometer (Norwalk, CT, USA). Additional irradiations were performed with fluorescent tubes TL12, used as a UV-B source, and TL10R, used as a UV-A source (Philips, Eindhoven, The Netherlands), on samples that were magnetically stirred in small Petri dishes. The UV-B output was measured with an IL 443 phototherapy radiometer, fitted with a SEE 1240 silicon detector probe and the UV-A output with an IL 442A phototherapy radiometer with a SEE 115 detector probe (International Light, Newburyport, MA, USA); UCA photo-oxidation on a preparative scale Concentrations of trans-UCA and hydrogen peroxide were largely increased, as was the UV exposure, to obtain larger amounts of UCA photo-oxidation products as collected fractions from the reversed phase column for further analysis. A typical chromatogram is shown in Fig. 4. Four fractions, designated as Rt 8, Rt 10, Rt 14, Rt 17, were finally selected for identification (peak A, 1-3 in Fig.4). Prior to analysis, tetrabutylammonium was removed by solid phase extraction on C18 silica.Identification Rt 8 was identified as imidazole-4-carboxaldehyde (ImCHO). Its UV-spectrum was identical to the synthesized (see below) reference compound with an absorption maximum of 257 nm. Co-injection of Rt 8 with synthesized imidazole-4-carboxaldehyde resulted in a single chromatographic peak with a retention time of 8.13 minutes. Further evidence is to be collected (peak A in Fig.4). The amount of ImCHO in the photooxidized UCA sample was gradually reduced upon storage at -20°C. Rt 10 was identified as imidazole-4-acetic acid. Its UV-spectrum was identical with an absorption maximum of 213 nm. Mass spectrum was obtained with electrospray technique and the dry sample was treated with methanol/HCl and n-butanol/HCl before analysis. A peak at mass 140 was obtained after methylation and at mass 183 after butylation. Consequently, the mass of the original compound was 126. Co-injection of Rt 10 with commercially available imidazole-4-acetic acid resulted in a single chromatographic peak with a retention time of 8.98 minutes (peak 1 in Fig.4). Rt 14 was identified as imidazole-4-carboxylic acid (ImCOOH). Its UV-spectrum was identical to the commercially obtained reference compound with an absorption maximum of 226 nm. Proton resonance (1H-NMR) analysis was done in D2O, showing imidazolic protons in a ratio 1:1 with shifts of 7.76 and 7.53 ppm. Mass spectrum was obtained with electrospray technique and the dry sample was treated with methanol/HCl and n-butanol/HCl before analysis. A peak at mass 126 was obtained after methylation and at mass 169 after butylation. Consequently, the mass of the original compound was 112. Co-injection of Rt 14 with commercially available ImCOOH resulted in a single chromatographic peak with a retention time of 14.73 minutes (peak 2 in Fig.4). The amount of ImCOOH in the photooxidized UCA sample was gradually increased upon storage at -20° C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With dihydrogen peroxide;pH 7.2;aqueous phosphate buffer;Product distribution / selectivity; | Fenton oxidation UCA isomers (10 or 40 muM) were oxidized with a hydroxyl-radical- generating system that consisted of various concentrations of ferrous ions (10 - 500 muM) and a fixed hydrogen peroxide concentration of 500 muM (the Fenton reagent), either in a sodium phosphate (10 or 20 mM) medium of pH 7.2, or in ultrapure water. In addition, two hydroxyl-radical-generating systems with copper ions (Cu2+) were used, consisting of 50 muM Cu2+ with either 500 muM hydrogen peroxide or 5 mM ascorbic acid. | |
With dihydrogen peroxide; In water;pH 7.2;Product distribution / selectivity; | Fenton oxidation UCA isomers (10 or 40 muM) were oxidized with a hydroxyl-radical- generating system that consisted of various concentrations of ferrous ions (10 - 500 muM) and a fixed hydrogen peroxide concentration of 500 muM (the Fenton reagent), either in a sodium phosphate (10 or 20 mM) medium of pH 7.2, or in ultrapure water. In addition, two hydroxyl-radical-generating systems with copper ions (Cu2+) were used, consisting of 50 muM Cu2+ with either 500 muM hydrogen peroxide or 5 mM ascorbic acid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
82% | Example 72An alternate method'for the synthesis of the imidazole intermediate is described below:4-Cyano-l-(2-trimethylsilanyl-ethoxymethyl)-lH-imidazole-2-carboxylic acid potassium salt a) lH-Imidazole-4-carbonitrile; '-NHA 22-L, four-neck, round-bottom flask equipped with a mechanical stirrer, a temperature probe, a condenser, and an addition funnel with a nitrogen inlet was charged with lH-imidazole-4-carboxaldehyde (Aldrich, 1.10 kg, 11.5 mol) and pyridine (3.0 L, 3.0 mol). The reaction flask was cooled to 8 0C with an ice bath and hydroxylamine hydrochloride (871 g, 12.5 mol) was added slowly in portions to maintain the internal temperature below 30 °C. The reaction was allowed to cool to ambient temperature and stirred for 2 h at ambient temperature. The resulting thick yellow solution was heated to 80 0C with a heating mantle and acetic anhydride (2.04 L, 21.6 mol) was added dropwise EPO <DP n="148"/>over 200 min to maintain the temperature below 110 °C during the addition. The reaction mixture was heated at 100 0C for 30 min, after which time it was allowed to cool to ambient temperature and then further cooled in an ice bath. The pH was adjusted to 8.0 (pH meter) by the addition of 25 wt percent NaOH (5.5 L) at such a rate that the internal temperature was maintained below 30 °C. The reaction mixture was then transferred into a 22-L separatory funnel and extracted with ethyl acetate (6.0 L). The combined organic layer was washed with brine (2 x 4.0 L), dried over MgSO4, filtered, and concentrated to dryness under reduced pressure at 35 °C to give the crude product as a yellow semisolid. The resulting semisolid was suspended in toluene (3.0 L) and stirred for 1 h, after which time it was filtered to give a light yellow solid, which was resuspended in toluene (3.0 L) and stirred for 1 h. The resulting slurry was filtered and the filter cake washed with toluene (2 x 500 mL) to give the title compound as a light yellow solid [870 g, 82percent). The 1H and 13C NMR spectra were consistent with the assigned structure. | |
82% | With pyridine; hydroxylamine hydrochloride; acetic anhydride; at 0 - 110℃; for 5.83333h; | A 22-L, four-neck, round-bottom flask equipped with a mechanical stirrer, a temperature probe, a condenser, and an addition funnel with a nitrogen inlet was charged with 1H-imidazole-4-carboxaldehyde (Aldrich, 1.10 kg, 11.5 mol) and pyridine (3.0 L, 3.0 mol). The reaction flask was cooled to 8° C. with an ice bath and hydroxylamine hydrochloride (871 g, 12.5 mol) was added slowly in portions to maintain the internal temperature below 30° C. The reaction was allowed to cool to ambient temperature and stirred for 2 h at ambient temperature. The resulting thick yellow solution was heated to 80° C. with a heating mantle and acetic anhydride (2.04 L, 21.6 mol) was added dropwise over 200 min to maintain the temperature below 110° C. during the addition. The reaction mixture was heated at 100° C. for 30 min, after which time it was allowed to cool to ambient temperature and then further cooled in an ice bath. The pH was adjusted to 8.0 (pH meter) by the addition of 25 wt percent NaOH (5.5 L) at such a rate that the internal temperature was maintained below 30° C. The reaction mixture was then transferred into a 22-L separatory funnel and extracted with ethyl acetate (6.0 L). The combined organic layer was washed with brine (2.x.4.0 L), dried over MgSO4, filtered, and concentrated to dryness under reduced pressure at 35° C. to give the crude product as a yellow semisolid. The resulting semisolid was suspended in toluene (3.0 L) and stirred for 1 h, after which time it was filtered to give a light yellow solid, which was resuspended in toluene (3.0 L) and stirred for 1 h. The resulting slurry was filtered and the filter cake washed with toluene (2.x.500 mL) to give the title compound as a light yellow solid [870 g, 82percent). The 1H and 13C NMR spectra were consistent with the assigned structure. |
82% | a) 1H-Imidazole-4-carbonitrile A 22-L, four-neck, round-bottom flask equipped with a mechanical stirrer, a temperature probe, a condenser, and an addition funnel with a nitrogen inlet was charged with 1H-imidazole-4-carboxaldehyde (Aldrich, 1.10 kg, 11.5 mol) and pyridine (3.0 L, 3.0 mol). The reaction flask was cooled to 8° C. with an ice bath and hydroxylamine hydrochloride (871 g, 12.5 mol) was added slowly in portions to maintain the internal temperature below 30° C. The reaction was allowed to cool to ambient temperature and stirred for 2 h at ambient temperature. The resulting thick yellow solution was heated to 80° C. with a heating mantle and acetic anhydride (2.04 L, 21.6 mol) was added dropwise over 200 min to maintain the temperature below 110° C. during the addition. The reaction mixture was heated at 100° C. for 30 min, after which time it was allowed to cool to ambient temperature and then further cooled in an ice bath. The pH was adjusted to 8.0 (pH meter) by the addition of 25 wt percent NaOH (5.5 L) at such a rate that the internal temperature was maintained below 30° C. The reaction mixture was then transferred into a 22-L separatory funnel and extracted with ethyl acetate (6.0 L). The combined organic layer was washed with brine (2*4.0 L), dried over MgSO4, filtered, and concentrated to dryness under reduced pressure at 35° C. to give the crude product as a yellow semisolid. The resulting semisolid was suspended in toluene (3.0 L) and stirred for 1 h, after which time it was filtered to give a light yellow solid, which was resuspended in toluene (3.0 L) and stirred for 1 h. The resulting slurry was filtered and the filter cake washed with toluene (2*500 mL) to give the title compound as a light yellow solid [870 g, 82percent). The 1H and 13C NMR spectra were consistent with the assigned structure. |
82% | A 22-L, four-neck, round-bottom flask equipped with a mechanical stirrer, a temperature probe, a condenser, and an addition funnel with a nitrogen inlet was charged with lH-imidazole-4-carboxaldehyde (Aldrich, 1.10 kg, 11.5 mol) and pyridine (3.0 L, 3.0 mol). The reaction flask was cooled to 8 0C with an ice bath and hydroxylamine hydrochloride (871 g, 12.5 mol) was added slowly in portions to maintain the internal temperature below 30 0C. The reaction was allowed to cool to ambient temperature and stirred for 2 h at ambient temperature. The resulting thick yellow solution was heated to 80 0C with a heating mantle and acetic anhydride (2.04 L5 21.6 mol) was added dropwise over 200 min to maintain the temperature below 110 0C during the addition. The reaction mixture was heated at 100 0C for 30 min, after which time it was allowed to cool to ambient temperature and then further <n="149"/>cooled in an ice bath. The pH was adjusted to 8.0 (pH meter) by the addition of 25 wt percent NaOH (5.5 L) at such a rate that the internal temperature was maintained below 30 °C. The reaction mixture was then transferred into a 22-L separatory funnel and extracted with ethyl acetate (6.0 L). The combined organic layer was washed with brine (2 x 4.0 L), dried over MgSO4, filtered, and concentrated to dryness under reduced pressure at 35 0C to give the crude product as a yellow semisolid. The resulting semisolid was suspended in toluene (3.0 L) and stirred for 1 h, after which time it was filtered to give a light yellow solid, which was resuspended in toluene (3.0 L) and stirred for 1 h. The resulting slurry was filtered and the filter cake washed with toluene (2 x 500 nxL) to give the title compound as a light yellow solid [870 g, 82percent). The 1H and 13C NMR spectra were consistent with the assigned structure. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium permanganate; In dichloromethane; at 40℃; for 4h; | (2) Mixing the obtained 1H-imidazole-4-carboxaldehyde with dichloromethane,Heat to 40C,Add KMnO4 and mix well.Stir the reaction for 4h,After filtration, distillation under reduced pressure, recrystallization, 1H-imidazole-4-carboxylic acid was obtained.The yield of 1H-imidazole-4-carboxylic acid produced was 94.3% and the purity was 99.3%. |
Tags: 3034-50-2 synthesis path| 3034-50-2 SDS| 3034-50-2 COA| 3034-50-2 purity| 3034-50-2 application| 3034-50-2 NMR| 3034-50-2 COA| 3034-50-2 structure
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H222 | Extremely flammable aerosol |
H223 | Flammable aerosol |
H224 | Extremely flammable liquid and vapour |
H225 | Highly flammable liquid and vapour |
H226 | Flammable liquid and vapour |
H227 | Combustible liquid |
H228 | Flammable solid |
H229 | Pressurized container: may burst if heated |
H230 | May react explosively even in the absence of air |
H231 | May react explosively even in the absence of air at elevated pressure and/or temperature |
H240 | Heating may cause an explosion |
H241 | Heating may cause a fire or explosion |
H242 | Heating may cause a fire |
H250 | Catches fire spontaneously if exposed to air |
H251 | Self-heating; may catch fire |
H252 | Self-heating in large quantities; may catch fire |
H260 | In contact with water releases flammable gases which may ignite spontaneously |
H261 | In contact with water releases flammable gas |
H270 | May cause or intensify fire; oxidizer |
H271 | May cause fire or explosion; strong oxidizer |
H272 | May intensify fire; oxidizer |
H280 | Contains gas under pressure; may explode if heated |
H281 | Contains refrigerated gas; may cause cryogenic burns or injury |
H290 | May be corrosive to metals |
Health hazards | |
Code | Phrase |
H300 | Fatal if swallowed |
H301 | Toxic if swallowed |
H302 | Harmful if swallowed |
H303 | May be harmful if swallowed |
H304 | May be fatal if swallowed and enters airways |
H305 | May be harmful if swallowed and enters airways |
H310 | Fatal in contact with skin |
H311 | Toxic in contact with skin |
H312 | Harmful in contact with skin |
H313 | May be harmful in contact with skin |
H314 | Causes severe skin burns and eye damage |
H315 | Causes skin irritation |
H316 | Causes mild skin irritation |
H317 | May cause an allergic skin reaction |
H318 | Causes serious eye damage |
H319 | Causes serious eye irritation |
H320 | Causes eye irritation |
H330 | Fatal if inhaled |
H331 | Toxic if inhaled |
H332 | Harmful if inhaled |
H333 | May be harmful if inhaled |
H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled |
H335 | May cause respiratory irritation |
H336 | May cause drowsiness or dizziness |
H340 | May cause genetic defects |
H341 | Suspected of causing genetic defects |
H350 | May cause cancer |
H351 | Suspected of causing cancer |
H360 | May damage fertility or the unborn child |
H361 | Suspected of damaging fertility or the unborn child |
H361d | Suspected of damaging the unborn child |
H362 | May cause harm to breast-fed children |
H370 | Causes damage to organs |
H371 | May cause damage to organs |
H372 | Causes damage to organs through prolonged or repeated exposure |
H373 | May cause damage to organs through prolonged or repeated exposure |
Environmental hazards | |
Code | Phrase |
H400 | Very toxic to aquatic life |
H401 | Toxic to aquatic life |
H402 | Harmful to aquatic life |
H410 | Very toxic to aquatic life with long-lasting effects |
H411 | Toxic to aquatic life with long-lasting effects |
H412 | Harmful to aquatic life with long-lasting effects |
H413 | May cause long-lasting harmful effects to aquatic life |
H420 | Harms public health and the environment by destroying ozone in the upper atmosphere |
Sorry,this product has been discontinued.
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