Tag: M.W=300-400

Reference of 162758-35-2,Some common heterocyclic compound, 162758-35-2, name is 5-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-4-methylpyrazole-3-carboxylic acid, molecular formula is C17H11Cl3N2O2, 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 solution of the acid 5c (80 mg, 0.21 mmol) and thionyl chloride (0.88 mL, 1.2 mmol) in toluene (5 mL) was reflux for 3 h. Solvent was evaporated under reduced pressure, and gave the crude carboxylic chloride (56 mg, 90%) as a light solid.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 5-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-4-methylpyrazole-3-carboxylic acid, its application will become more common.

Synthetic Route of 152120-54-2, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 152120-54-2 name is tert-Butyl (((tert-butoxycarbonyl)amino)(1H-pyrazol-1-yl)methylene)carbamate, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

General procedure: Cbz-Arg(N,N-diBoc)-Val-Sta-NH(CH2)2Ph (69). A mixture of Cbz-Orn(N-Boc)-Val-Sta-NH(CH2)2Ph (52) (65 mg, 0.090 mmol) and 4M HCl in dioxane was allowed to stir for 1 h at 20C. The reaction mixture was concentrated to dryness in vacuo to obtain the crude residue as a on oil. The oil was dissolved in DCM (1 mL) and Et3N (6 muL, 0.043 mmol) was added. The solution was stirred vigorously for 5min. N,N?-bis-Boc-1-guanylpyrazole (13 mg, 0.042 mmol) was added and the solution was allowed to stir for 18 h at 20C. The reaction mixture was concentrated to dryness in vacuo to obtain a crude residue. The crude residue was subjected to a silica chromatography gradient eluting from 100% DCM to 10% MeOH/DCM to obtain Cbz-Arg(N,N-diBoc)-Val-Sta-NH(CH2)2Ph (69) as a solid (46 mg, 53%).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, tert-Butyl (((tert-butoxycarbonyl)amino)(1H-pyrazol-1-yl)methylene)carbamate, and friends who are interested can also refer to it.

Adding a certain compound to certain chemical reactions, such as: 152120-54-2, name is tert-Butyl (((tert-butoxycarbonyl)amino)(1H-pyrazol-1-yl)methylene)carbamate, belongs to pyrazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 152120-54-2, Computed Properties of C14H22N4O4

Preparation of (R)-6-[2,3-bis(tert-butoxycarbonyl)guanidino]-2-[(tert-butoxycarbonyl)amino]hexanoic acid (8) A solution of N-alpha-Boc-D-lysine 12 (10.0 g, 40.6 mmol) in CH2Cl2 (200 mL) was charged with N,N’-bis-Boc-1-guanylpyrazole (11.3 g, 36.6 mmol) and triethylamine (11.0 mL, 81.3 mmol). The reaction mixture was stirred at room temperature for 16 h. The reaction mixture was washed with 10% aqueous citric acid (2*100 mL) and the solvent was removed under reduced pressure. The residue was dissolved in 1 N NaOH (300 mL), 1 N HCl was added to adjust the pH to 5-6, and the mixture was extracted with CH2Cl2 (500 ml). The CH2Cl2 layer was separated and the aqueous layer was extracted with CH2Cl2 (2*250 mL). The combined organic layers were dried over Na2SO4, filtered, and concentrated to afford compound 8 (18.5 g, 94%) as a white solid: 1H NMR (400 MHz, CD3OD) delta 4.13-4.03 (m, 1H), 3.36 (t, J=6.8 Hz, 2H), 1.91-1.77 (m, 1H), 1.74-1.55 (m, 3H), 1.52 (s, 9H), 1.51-1.38 (m, 2H), 1.47 (s, 9H), 1.43 (s, 9H).

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, tert-Butyl (((tert-butoxycarbonyl)amino)(1H-pyrazol-1-yl)methylene)carbamate, other downstream synthetic routes, hurry up and to see.

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 120068-79-3 as follows. SDS of cas: 120068-79-3

Comparative Example 13; [0123] Direct sulfinylation of N-phenyl pyrazole starting material (III) according to known methods was tested. As such, sulfinylation was attempted using CF3SO2Na in the presence of a halogenating agent such as POCl3, SOCl2 or PBr3. (III) (II)The reaction reagents and conditions tested are provided in Table I below. Table IUl The results are provided in Table II below: Table II[0124] The reaction proceeded to the desired product, Fipronil, when SOCl2 or POCl3 were used as halogenating agents. However, PBr3 did not yield the desired product, or at least not in acceptable yield (about 6%~8% (II) in the reaction mixture, according to HPLC).

According to the analysis of related databases, 120068-79-3, the application of this compound in the production field has become more and more popular.

Adding a certain compound to certain chemical reactions, such as: 120068-79-3, name is 5-Amino-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-1H-pyrazole-3-carbonitrile, belongs to pyrazoles-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 120068-79-3, Safety of 5-Amino-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-1H-pyrazole-3-carbonitrile

General procedure: Phenylpyrazole (0.2 mmol), arylboronic acid (0.4 mmol), NIS (0.2 mmol), [Pd] (10 mol%), NaHCO3 (0.4 mmol) and C2H5OH:H2O (3:1, 10 mL), were added to a Schlenk tube. Then the tube was charged with N2 and the reaction mixture was stirred at 80 C for 18 h. After the completion of the reaction, as monitored by TLC, the mixture was cooled and filtrated. The filtrate was extracted with ethyl acetate and washed with brine. Then the combined organic extracts were dried over Na2SO4, concentrated under vacuum and the resulting residue was purified by silica gel column chromatography to afford the desired products.

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Application of 162758-35-2, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 162758-35-2 name is 5-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-4-methylpyrazole-3-carboxylic acid, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

To a suspension of 5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxylic acid (3.82 g, 10 mmol) in toluene (75 ml) was added thionyl chloride (3.64 ml, 50 mmol) and the mixture was refluxed for 3 hours and then cooled to the room temperature. The solvent was evaporated off under the reduced pressure. The residue was redissolved in toluene (30 ml) and the solvent was evaporated off again (procedure repeated twice) to yield the carboxyl chloride (3.94 g, 98% yield).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 5-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-4-methylpyrazole-3-carboxylic acid, and friends who are interested can also refer to it.

17635-44-8, name is 3,4,5-Tribromopyrazole, belongs to pyrazoles-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. Computed Properties of C3HBr3N2

EXAMPLE 2 Preparation of 3,4,5-Tribromopyrazole-1-propionic Acid A mixture consisting of 9.1 gm. (0.03 mole) 3,4,5-tribromopyrazole and 8.1 gm. (0.045 mole) ethyl 3-bromopropionate was heated at 140 C. for 24 hrs. in an atmosphere of nitrogen. After cooling, 80 ml. 0.5 N aqueous sodium hydroxide was added to the reaction mixture and it was heated at the reflux temperature for 3 hrs. After cooling again and adding 1 N aqueous hydrochloric acid until the mixture was pH 2, a precipitate formed. The precipitate was collected on a filter and recrystallized from a mixture of ether and technical hexane. There was thus obtained 10.1 gm. of 3,4,5-tribromopyrazole-1-propionic acid having a melting point at 112 to 113 C. Analysis: Calc’d. for C6 H5 Br3 N2 O2: C, 19.12; H, 1.33; N, 7.43; Br, 63.61. Found: C, 19.31; H, 1.54; N, 7.44; Br, 64.05.

The synthetic route of 17635-44-8 has been constantly updated, and we look forward to future research findings.

Related Products of 95162-14-4, 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. 95162-14-4, name is 4-Bromo-1-tritylpyrazole belongs to pyrazoles-derivatives compound, it is a common compound, a new synthetic route is introduced below.

To a mixture of bromopyrazole (5) (1. [0G,] 2. [56MOL),] [BORONIC ACID] (1) (0.7g, 2. [14MMOL),] and potassium carbonate (1.5g, 10. [7MMOL)] in degassed DME [(10ML)] was added [PDC12 [DPPF]] (0. 088g, [0.] [1MMOL).] The reaction mixture was then heated to [70C] under nitrogen for 24 hours. Solvent was then removed in vacuo, and the residue was partitioned between ethyl acetate and water. The organic portion was dried over sodium sulphate and solvent evaporated in vacuo to give the crude product. Purification via silica gel chromatography (ethyl acetate/petroleum ether 40-60 1: 4) gave the title compound (0.74g) LCMS [RT 4. 11 MIN, [CPH3] + 243]

The synthetic route of 4-Bromo-1-tritylpyrazole has been constantly updated, and we look forward to future research findings.

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. 718632-46-3, name is 5-tert-Butyl 2-ethyl 3-amino-6,6-dimethylpyrrolo[3,4-c]pyrazole-2,5(4H,6H)-dicarboxylate, A new synthetic method of this compound is introduced below., Quality Control of 5-tert-Butyl 2-ethyl 3-amino-6,6-dimethylpyrrolo[3,4-c]pyrazole-2,5(4H,6H)-dicarboxylate

Example 1; 6,6-Dimethyl-3-[4-(4-methyl-piperazin-l-yl)-benzoylamino]-4,6-dihydro-lH- pyrrolo[3,4-c]pyrazole-2,5-dicarboxylic acid 5-tert-butyl ester 2-ethyl ester [Formula (IV), R = 4-(4-methyl-piperazin)-phenyl]; To a solution of 3-Amino-6,6-dimethyl-4H,6H-pyrrolo[3,4-c]pyrazole-2,5- dicarboxylic acid 5-tert-butyl ester 2-ethyl ester (2.50 g, 7.70 mmol) prepared as reported in WO2004/056827, N,N-diispropylethylamine (14.6ml, 33.6mmol) in anhydrous Dioxane (100 ml), 4-(4-Methyl-piperazin-l-yl)-benzoyl chloride (0.24 g ,1.00 mmol) was added. The reaction was heated to reflux and stirred for 6h. The solvent was removed under vacuum, the residue dissolved in CH2Cl2 (150 mL) and washed with brine (I X 10OmL). The organic phase was dried over sodium sulphate, the solvent evaporated in vacuo and the residue purified by flash chromatography (Acetone/DCM 80/20) affording 2.1O g (yield 52%) of the title compound. ESI MS: m/z 527 (MH+); 1H NMR (400 MHz, DMSO-d6): delta 10.69 (s, IH), 7.76 (m, 2H), 7.09 (m, 2H), 4.55 (d, 2H, J = 9.8 Hz), 4.48 (q, 2H, J = 7.1 Hz), 3.34 (m, 4H), 2.52 (m, 4H), 2.27 (s, 3H ), 1.64 (s, 3H ), 1.62 (s, 3H ), 1.47 (s, 9H), 1.38 (t, 3H, J= 7.1 Hz).

The synthetic route of 718632-46-3 has been constantly updated, and we look forward to future research findings.