Tag: M.W=100-200

Reference of 36947-68-9,Some common heterocyclic compound, 36947-68-9, name is 2-Isopropyl-1H-imidazole, molecular formula is C6H10N2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

Preparation 20; 4-(2-isoPropyl-1H-imidazol-1-yl)piperidine; Methanesulphonyl chloride (0.27 mL, 3.4 mmol) was added dropwise to a stirring mixture of 1-tertbutoxycarbonyl-4-hydroxypiperidine (457 mg, 2.27 mmol) and triethylamine (0.95mL, 6.8 mmol) in dichloromethane (10 mL) at 0 C. under nitrogen. After 20 mins, the mixture was allowed to warm to room temperature and stirred for a further 30 mins. Water (10 mL) was added and the organic layer was separated and the solvent evaporated under reduced pressure. The residue was taken up in acetonitrile (10 mL) and 2-isopropylimidazole (250 mg, 2.27 mmol) and cesium carbonate (880 mg, 22.7 mmol) were added. The mixture was refluxed for 3 days and then allowed to cool. The mixture was filtered and the solvent was removed in vacuo. The residue was filtered through a silica plug using ethyl acetate and the solvent was removed under reduced pressure. The residue was dissolved in methanol (5 mL) and ethereal hydrogen chloride (5 mL of a 2N solution) was added. The mixture was stirred overnight, the solvent was removed in vacuo and the residue was chromatographed on silica gel using an elution gradient of dichloromethane to 94:6:0.6 dichloromethane:methanol:0.88 ammonia as eluant to afford the title compound as a white solid, 28 mg.LRMS: m/z APCI 194 [MH]+

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Isopropyl-1H-imidazole, its application will become more common.

Reference:
Patent; PFIZER INC; US2009/209578; (2009); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 16681-56-4, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 16681-56-4, name is 2-Bromo-1H-imidazole belongs to imidazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

To 7.3 g (50 mmol) of 2-bromo-1H-imidazole, 11.1 g of 9-anthracene boronic acid(50 mmol) and 3.5 g (5 mmol) of bistriphenylphosphine palladium dichloride were added 130 ml of 2M aqueous sodium carbonate solution, 260 ml of methylBenzene and 86 ml of ethanol at 100 C for 12 hours. After the system had cooled down, extract with methylene chloride and wash with distilled waterThe organic phase is then washed with anhydrous magnesium sulfate and the solvent is evaporated to dryness. Column chromatography (n-hexane: dichloromethane = 20: 1)Purification gave 8.43 g of intermediate A-1.

The synthetic route of 2-Bromo-1H-imidazole has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Changchun Hai Purunsi Technology Co., Ltd.; Zhou Wenting; Cai Hui; (17 pag.)CN107383071; (2017); A;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Reference of 41716-18-1,Some common heterocyclic compound, 41716-18-1, name is 1-Methyl-1H-imidazole-4-carboxylic acid, molecular formula is C5H6N2O2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

The complex 1 was obtained during attempted 1:2CuSO4.5H2O and L1H in methanol/water (2:1 v/v) solution atroom temperature under continuous stirring. After stirring for20 min, the solution that resulted from the mixture was filteredoff and allowed to evaporate at room temperature. Blue blockcrystals of 1 formed in about 5 days. Elemental analysis for 1,Anal. Calcd. (percent): C, 31.13; H, 4.70; N, 14.52. Found: C, 31.17;H, 4.73; N, 14.59.

The synthetic route of 41716-18-1 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Yang, Li-Jing; Song, Wen-Tao; Luo, Yang-Hui; Sun, Bai-Wang; Inorganic and Nano-Metal Chemistry; vol. 47; 4; (2017); p. 493 – 499;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 934-32-7, name is 1H-Benzo[d]imidazol-2-amine, A new synthetic method of this compound is introduced below., SDS of cas: 934-32-7

General procedure: A mixture of ethyl acetoacetate and/or acetylacetone (1 mmol) or malononitrile(1.1 mmol), 2-aminobenzimidazole (1 mmol), aldehyde (1 mmol) and [PVPH]ClO (30 mg, 6.84 mol %) was heated at 100 C in an oil bath for the appropriate time.After completion of the reaction [monitored by thin layer chromatography (TLC): nhexane:ethyl acetate (3:1)], the reaction mixture was cooled to room temperatureand EtOH (5 mL) was added to it and filtered to separate the catalyst. Afterevaporation of the solvent from the filtrate, the crude solid product wasrecrystallized from ethanol to obtain pure A or B products.The spectral [IR, proton ( 1H) NMR and 13C NMR] data of new compounds arepresented below.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Article; Abedini, Masoumeh; Shirini, Farhad; Mousapour, Maryam; Goli Jolodar, Omid; Research on Chemical Intermediates; vol. 42; 7; (2016); p. 6221 – 6229;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 75370-65-9 as follows. Safety of 4-Amino-1H-benzo[d]imidazol-2(3H)-one

Amine 2a (1.3 g, 5.9 mmol) was dissolved in 40 ml of AcOEt and at 0C triphosgene (1.75 g, 5.9 mmol) was added to the solution. The mixture was warmed at 80C for 4 hours then evaporated and the residue was dissolved in 5ml of DMF. The solution of the isocyanate was added dropwise to a solution in DMF (10 ml) of compound la (860 mg, 5.77 mmol) and the mixture was warmed at 80C for 8 hours. (TLC AcOEt). The solvent was evaporated and the crude was dissolved in AcOEt (50 ml) and washed with water (1 X 30 ml) and brine. The organic phase was dried over sodium sulfate and concentrated under vacuum. The purification of the crude residue by chromatographic column gave 650mg of a yellow solid. Yield = 28% ‘HNMR (DMSO, 200 MHz) delta 2.51 (6H, bs), 4.43 (2H, d, J = 5.6 Hz), 6.62 (1H, dd, J = 7.6 Hz, J’ = 1 Hz), 6.82 (2H, m), 6.97 (1H, dd, J = 8 Hz, J’ = 1 Hz), 7.32 (1H, s), 7.39 (1H, d), 7.49 (1H, d), 8.35 (1H, bs), 9.99 (1H, bs), 10.59 (1H, bs); [M+1] 394.1 (C18H18F3N5O2 requires 393.36).

According to the analysis of related databases, 75370-65-9, the application of this compound in the production field has become more and more popular.

Reference:
Patent; PHARMESTE S.R.L.; NAPOLETANO, Mauro; TREVISANI, Marcello; PAVANI, Maria Giovanna; FRUTTAROLO, Francesca; WO2011/120604; (2011); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Synthetic Route of 17325-26-7, These common heterocyclic compound, 17325-26-7, name is Methyl 1H-imidazole-5-carboxylate, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

a) Methyl 2-isopropyl- lH-imidazole-4-carboxylateA solution of methyl lH-imidazole-4-carboxylate (5.0 g, 39.68 mmol), AgN03 (4.0 g, 23.81 mmol), isobutyric acid (10.4 g, 1 19.1 mmol) in 10 % H2S04 (150 ml) was heated at 80 C for 15 min. An aqueous solution of (NH4)2S208 (28.0 g, 119.1 mmol) was added to the mixture dropwise in 15 minat 80 C. The reaction mixture was cooled to RT and poured into ice. The mixture was basified with aqueous ammonia (pH 9) and extracted with EtOAc (500 ml). The organic layer was concentrated and the residue was purified by flash chromatography. Yield 1.5 g. 1H- NMR (400 MHz; CDC13): delta 1.36 (d, 6H), 3.05-3.14 (m, 1H), 3.87 (s, 3H), 7.62 (s, 1H).

The synthetic route of 17325-26-7 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ORION CORPORATION; TOeRMAeKANGAS, Olli; WOHLFAHRT, Gerd; SALO, Harri; RAMASUBRAMANIAN, Rathna, Durga; PATRA, Pranab, Kumar; MARTIN, Arputharaj, Ebenezer; HEIKKINEN, Terhi; VESALAINEN, Anniina; MOILANEN, Anu; KARJALAINEN, Arja; WO2012/143599; (2012); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Related Products of 1003-21-0, In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 1003-21-0 as follows.

Example 14a: 4-((3-(4-(1H-1,2,4-triazol-1-yl)benzyl)-4-chloro-2-methoxyquinolin-6-yl)(hydroxy)(1-methyl-1H-imidazol-5-yl)methyl)benzonitrile A solution of isopropylmagnesium chloride-lithium chloride complex in tetrahydrofuran (1.3 M, 0.986 mL, 1 ,28 mmol) was added dropwise to an ice-water cooled, stirring suspension of 5- bronio-1 -methyl- IH- imidazole (241 mg, 1.50 mmol) in dry tetrahydrofuran (6 mL). After 5 minutes, the flask was removed from the cooling bath and the white suspension was stirred at 23 C. After 10 minutes, the Grignard suspension was added to an ice-water cooled, stirring mixture containing 4-(3-(4-( IH- 1 ,2,4-triazol- 1 -yl)benzyl)-4-chloro-2-methoxyquinoline-6- carbonyl)benzonitrile (205 mg, 0.427 mmol, Intermediate 16: step e) and lanthanum(III) chloride bis(lithium chloride) complex (0.6 M solution in tetrahydrofuran, 1.42 mL, 0.854 mmol) in dry tetrahydrofuran (8 mL), After 20 minutes, 1 M aqueous citric acid solution (1 niL) was added. The flask was removed from, the cooling bath and then ethyl acetate (100 mL) was added. Additional 1 M aqueous citric acid solution (-15 mL) was added until the mixture was comprised of two homogeneous layers, at which point saturated aqueous sodium bicarbonate solution was added until the H of the aqueous layer was ~8 by litmus paper test. The layers were separated. The aqueous layer was extracted with ethyl acetate (20 mL). The organic layers were combined and the combined solution was dried over sodium sulfate. The dried solution was filtered. Silica gel (5 g) was added to the filtrate and the mixture was concentrated by rotary evaporation to afford a free-flowing powder. The powder was loaded onto a silica gel column for flash-column chromatography purification. Elution with dichloromethane initially, grading to 50% methanol–dich.lorometh.ane provided the title compound as a w hite solid. H NMR (5001 MHz, CDCI3) delta ppm 8.45 (s, 1H), 8.10 (d . ./ 2.2 Hz, 1 I S). 8.0(S (s, U S). 7.81 (d, ,/ 8.8 Hz, 1H), 7.65 (d, J = 8.5 Hz, 2H), 7.58-7.51 (m, 5H), 7.44-7.38 (m, 3H), 6.41 (d, ,7 = 1.1 Hz, 1H), 4.33 (s, 2H), 4.09 (s, 3H), 3.94 (s, 1H), 3.38 (s, 3H); MS (ESI): mass calcd. C31H24CIN7O2, 561.2; m/z found, 562.1 [M+H]+.4-((3-(4-(l H-l ,2,4-Triazol-l-yl)benzyl)-4-chloro-2-methoxyquinolin-6lH-imidazol-5-yl)methyl)benzonitrile was purified by chiral SFC (Chiralpak AD-H column, 5 mupiiota, 250 mm. 20 mm, mobile phase: 60% C02, 40% methanol) to give two enantiomers. The first eluting enantiomer was Example 14b:3H NMR (500 MHz, CDCI3) delta ppm 8.44 (d, J = 1.0 Hz, 1H), 8.10 (d, J= 2.1 Hz, 1 H), 8.06 (s, 1 H), 7.81 (d, J= 8.7 Hz, 1H), 7.66 (d, J= 8.2 Hz, 2H), 7.58-7.50 (m, 5H), 7.44-7.38 (m, 3H), 6.42 (s, 1H), 4.33 (s, 2H), 4,09 (s, 3H), 4.02-3.81 (br s, 1 H), 3.38 (s, 3H); MS (ESI): mass calcd. C31H24CIN7O2, 561.2; m/z found, 562.3 [M+H]+ and the second eluting enantiomer was Example 14c: H NMR (500 MHz, CDCI3) delta ppm. 8.45 (s, I I I). 8.09 (d, J —— 2.2 Hz, 1 H), 8.06 (s, IH), 7.85 (d, ./ 8.9 Hz, 1H), 7.66 (d, ./ = 8.1 Hz, 21 1).7.58-7.51 (m, 5H), 7.45-7.38 (m, 3H), 6.43 (s, 5 H), 4.33 (s, 2H), 4.09 (s, 3H), 3.38 (s, 3H); MS (ESI): mass calcd. C31H24CIN7O2, 561 .2; m/z found, 562.3 [M+H]+.

According to the analysis of related databases, 1003-21-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; LEONARD, Kristi A.; BARBAY, Kent; EDWARDS, James P.; KREUTTER, Kevin D.; KUMMER, David A.; MAHAROOF, Umar; NISHIMURA, Rachel; URBANSKI, Maud; VENKATESAN, Hariharan; WANG, Aihua; WOLIN, Ronald L.; WOODS, Craig R.; FOURIE, Anne; XUE, Xiaohua; CUMMINGS, Maxwell D.; JONES, William Moore; GOLDBERG, Steven; WO2015/57205; (2015); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

496-46-8, name is Tetrahydroimidazo[4,5-d]imidazole-2,5(1H,3H)-dione, belongs to imidazoles-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. category: imidazoles-derivatives

Preparation of a cucurbituril trimer (Figure 23, Compound 38) :; As is exemplified in Figure 23, an exemplary pathway for forming a cucurbituril trimer involves a disubstituted cucurbituril derived from benzil. Such a pathway generally includes preparation of a benzil-derived glycoluril, as described hereinabove, a formation OF A DERIVATIZED CB monomer, and a trimerization step. As a starting material, a benzil-derived glycoluril (Figure 23, Compound 35) is prepared by reacting a para-substituted benzil with urea in a 1: 2 ratio in benzene and trifluoroacetic acid, according to the exemplary syntheses are presented hereinabove. In one non-limiting example, one of the para-substituents on the benzil is a carboxyl group and the second is hydrogen (Figure 23, Compound 34). Compound 35, is reacted with glycoluril, Compound 2, in a 1: 5 ratio, and with formaldehyde, in the presence of concentrated sulfuric acid, to thereby form the derivatized cucurbituril biphenyl-CB [6] (Figure 23, Compound 36). Compound 36 is reacted with 1,3, 5-benzenetriamine (BTA) in a 3: 1 ratio so as to form three amide bonds between each of the carboxyl groups on the derivatized CB [6] and an amine on the BTA, and thus form a cucurbituril trimer having a BTA as the assembling unit (Figure 23, Compound 38).

The synthetic route of 496-46-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; TECHNION RESEARCH & DEVELOPMENT FOUNDATION LTD.; WO2005/23816; (2005); A2;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 3304-70-9, These common heterocyclic compound, 3304-70-9, name is Dimethyl 4,5-imidazoledicarboxylate, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

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]+

The synthetic route of 3304-70-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Boehringer Ingelheim International GmbH; US2005/203095; (2005); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application of 1615-14-1, A common heterocyclic compound, 1615-14-1, name is 2-(1H-Imidazol-1-yl)ethanol, molecular formula is C5H8N2O, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

1-(Hydroxyethyl)imidazole (5.30 g; 47.3 mmol) was dissolved in anhydrous THF (50 mL) and cooled in an ice-bath. Sodium hydride (2.08 g of a 60 wt % dispersion in oil, 52.0 mmol) was added in portions over 10 min. The ice-bath was removed, and the mixture was stirred at room temperature for 20 min. A solution of 1-fluoro-4-nitrobenzene (5.0 mL, 47.2 mmol) in anhydrous THF (10 mL) was added over 5 min and the mixture stirred for a further 1.5 hr. Water (a few mL) was cautiously added and the mixture concentrated under reduced pressure. The residue was partitioned between EA (75 mL) and water (75 mL), and the phases separated. The aqueous phase was extracted twice with EA and the combined organic layers extracted three times with 1N hydrochloric acid. The pH of these acidic extracts was then adjusted to 7 with 5N aqueous sodium hydroxide and the resulting milky solution extracted three times with EA. The combined organic extracts were washed with water and brine, then dried over magnesium sulfate and concentrated under reduced pressure to give 1-(2-(4-nitrophenoxy)-ethyl)-1H-imidazole (5.46 g) as a brown oil. A solution of 1-(2-(4-nitrophenoxy)ethyl)-1H-imidazole (5.46 g; 2.34 mmol) in ethanol (60 mL) was hydrogenated at atmospheric pressure with 10% palladium on carbon (0.40 g) at room temperature for 20 hr. The mixture was filtered through diatomaceous earth and then concentrated under reduced pressure to give 4-[2-(1H-imidazol-1-yl)ethoxy]benzenamine (4.56 g) as a white solid.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Telik, Inc.; US2010/81653; (2010); A1;,
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem