Tag: M.W=200-300

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 619-58-9, name is 4-Iodobenzoic acid, This compound has unique chemical properties. The synthetic route is as follows., Safety of 4-Iodobenzoic acid

To a solution of 4-iodobenzoic acid (2.0g, 1.0mmol), copper (I) iodide (1.7g, 1.13mmol), palladium chloride (0.02g, 0.15mmol) and triphenylphosphine (2.1g, 1.0mmol) in triethylamine (7ml), was added ethynyltrimethylsilane (1.2g, 1.5mmol) dropwise over 30min. The resulting reaction mixture was then refluxed at 80C for 24h under an atmosphere of argon and monitored by TLC. After the completion of reaction, as indicated by the complete disappearance of starting material on TLC, the mixture was cooled and filtered through a Buchner funnel. The volatile solvents were removed under reduced pressure. The resulting crude light brown coloured material was extracted into ether, washed with brine solution, dried over anhydrous sodium sulphate, and concentrated. Finally the silylated product was purified by column chromatography on silica gel with 3% ethyl acetate in hexane as an eluent yielding 86% of pure 4-[2-(trimethylsilyl)ethynyl]benzoic acid (2). Off white solid, 1.53g; IR: 2953, 2156, 1681, 1604, 1454, 1377, 1251, 858cm-1; 1H NMR (500MHz, CDCl3): 8.0 (d, J=8.6, 2H, Ar-H), 7.6 (d, J=8.4, 2H, Ar-H), 0.27 (s, 9H).

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand reaction routes of 619-58-9.

156150-67-3, name is 2-Chloro-1-fluoro-4-iodobenzene, belongs to iodides-buliding-blocks 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 C6H3ClFI

General procedure: A solution of 4-cyano-1H-imidazole (1000 mg, 10.74 mmol), 4-iodo -2-(trifluoromethyl)pyridine (3800 mg,14 mmol), (1R,2R)-N1,N2-dimethyl cyclohexane -1,2-diamine (150 mg, 1.07 mmol), CuI (200 mg, 1.07 mmol) and Cs2CO3 (7000 mg, 21.5 mmol) in 20 mL anhydrous DMF was stirred at 100 oC for 2 hours. The reaction mixture was cooled to room temperature and poured into 200 mL water. The mixture was extracted with ethyl acetate (80 mL*3). The organic layer were combined, washed by brine, dried by Na2SO4 and evaporated. The crude product was purified by silica flash column to afford compound 2 as white solid(1.5 g, 59% yield).

The synthetic route of 156150-67-3 has been constantly updated, and we look forward to future research findings.

Electric Literature of 5876-51-7, A common heterocyclic compound, 5876-51-7, name is 5-Iodobenzo[d][1,3]dioxole, molecular formula is C7H5IO2, 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.

[00233] To 24.7 mg PdCl2[(PPh2(CH2)5PPh2] in a reaction tube under nitrogen was added 4 ml dioxane and 0.43 ml (3.0 mmol) of triethylamine. The mixture was heated at 80 C. to give an orange coloured solution which still contained solids, presumably PdCl2[(PPh2(CH2)5PPh2]. To this mixture, at room temperature, were added 0.23 ml (1.5 mmol) pinacolborane (solution became brown but still contained insolubles) and 255 mg (1.03 mmol) 1-iodo-3,4-methylenedioxybenzene. The reaction solution was warmed to 80 C. with stirring in an oil bath. Analysis of the reaction solution by gc, as described above, was carried out at intervals (see Table 20.1). The reaction was complete after 5 h reaction time. The reaction solution was a bright crimson colour at the completion of the reaction and the only solids present on cooling to room temp. appeared to be the triethylamine salt. The amount of pinacol ester of phenylboronic acid formed is low with PdCl2[(PPh2(CH2)5PPh2] as catalyst and forms only later in the reaction. [TABLE-US-00009] TABLE 20.1 Rate of product formation on reaction of 1-iodo-3,4-methylenedioxybenzene with pinacolborane at 80 C. The catalyst PdCl2[(PPh2(CH2)5PPh2] was heated with the base triethylamine (3.0 mmol) prior to reaction. The concentrations are expressed in area % (uncorrected for response factors) determined by gc analysis of aliquots of the reaction solution taken at selected reaction times*. Reaction Time (mins) [C00056] [C00057] [C00058] [C00059] 5 0 0 99 1 15 0 0 90 10 30 4.0 0 60 36 60 5.2 0 40 54 150 7.1 1.8 13 78 210 7.9 2.1 3.5 86 300 9.3 2.4 0 88 *The reaction was quenched at the selected reaction time by addition of the aliquot of reaction solution to a water/ethyl acetate mixture.

The synthetic route of 5876-51-7 has been constantly updated, and we look forward to future research findings.

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 41252-95-3 as follows. SDS of cas: 41252-95-3

To a jacketed reactor, N,N-dimethylacetamide (DMAc) (120 mL) and soium ethylate (NaOEt) powder (12.1 g) is charged at 20 C. Diethylmalonate (28.8 g) is added dropwise into the above mixture while keeping internal temperature at around 10 C. After finishing addition, warm up the mixture to 20 C, and continue to stir for another 10 minutes. Then, 2-chloro-5- iodonitrobenzene (17 g) is added in one portion, and heat the mixture to 78 C and stir for usually at least 2.5 hours until process monitor shows almost complete conversion. The resulting mixture is cooled down to 20 C, and it is quenched by 2 N cold aq. HCI solution (180 mL). The bottom yellow oil was tranfered to a jaceket reactor with ethanol (92 mL) in it. Then, to the above solution the first portion of SnCI2.2H20 (30 g) powder is added, and the resulting mix- ture is heated to 70 C and stirred for 1 hour. The second portion of SnCI2.2H20 (30 g) is added, the mixture is stirred usually at least 0.5 hour until process monitor shows almost complete conversion. Then, heat the resulting mixture to 80 C and add 36% aq. HCI solution (60 mL) during 0.5 hour. The mixture is stirred for at least 2.5 hours until process monitor shows almost complete conversion. Then, to the mixture water (90 mL) is added and the resulting mix- ture is cooled down to 20 C. Collect the solid by filtration and wash the solid with water (250 mL) to afford the crude 6-iodo-2-oxindole. Then, it is purified by crystallization with acetic acid (HOAc) (1 10 mL), and followed by washing with 3 N aq. HCI solution (80 mL) to afford the 6- iodo-2-oxindole in 53% yield and 99% HPLC purity (Rt = 7.45 min).

According to the analysis of related databases, 41252-95-3, the application of this compound in the production field has become more and more popular.

Application of 619-58-9, The chemical industry reduces the impact on the environment during synthesis 619-58-9, name is 4-Iodobenzoic acid, I believe this compound will play a more active role in future production and life.

EXAMPLE 10: (E)-3- [4- (8, 8-Dimethyl-5-p-tolyl-7,8- dihydro-2-naphthylselanyl) phenyl] acrylic acid a. 2-(4-IODOPHENYL) ETHANOL 12.5 g (50.4 mmol) of 4-iodobenzoic acid are dissolved in 125 ml of. tetrahydrofuran, and 112 ml (122 mmol) of a 1M solution of borane in tetrahydrofuran are then added dropwise. The reaction medium is stirred for 4 hours, acidified with 2N hydrochloric acid solution and then extracted with ethyl acetate. A white solid is obtained (11.49 g ; yield = 97%).

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, 4-Iodobenzoic acid, other downstream synthetic routes, hurry up and to see.

Electric Literature of 886762-73-8, The chemical industry reduces the impact on the environment during synthesis 886762-73-8, name is 2-Fluoro-6-iodoaniline, I believe this compound will play a more active role in future production and life.

3.90.2. Step ii): 2-ethyl-6-fluoroaniline PdCl2dppf (0.1 eq, 375 mg), Cs2C03 (3 eq, 4.5 g) and 6-fluoro-2-iodoaniline (1 eq, 1.1 g) are dissolved in dry DMF (50 mL) in a 250 mL round bottom flask. The suspension is degassed under nitrogen atmosphere for 10 min, followed by the addition of triethylborane (1M in hexane, 1.3 eq, 6.0 mL). The reaction is heated to 55C for 2 h, using a condenser. Upon completion of the reaction, as shown by LC-MS, the suspension is filtered over a Celite pad, which is washed with DCM. The filtrate is poured into water and extraction with DCM (3 x 50 mL) is performed. The combined organic layers are dried (Na2S04) and concentrated in vacuo. The residue is purified by silica chromatography (petroleum ether/EtOAc; 100:0 to 80:20) to give the desired product.

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, 2-Fluoro-6-iodoaniline, other downstream synthetic routes, hurry up and to see.

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. 491862-84-1, name is 3-Fluoro-5-iodotoluene, A new synthetic method of this compound is introduced below., Product Details of 491862-84-1

[00464j To a 1OOml flask was added 3-bromo-1H-i,2,4-triazole (739.8 mg, 5 mmol), CuT (95.2 mg, 0.50 mmol) and Cs2C03 (1.629 g, 5.0 mmol) and the flask was evacuated thenbackfilled with N2 before adding DMS0 (5 mL) and i-fluoro-3-iodo-5-methyl-benzene (590.1 mg, 2.50 mmol). The reaction mixture was heated at 100C for 20h at which time LCMSindicated the major peak was desired product. To the reaction mixture was added Et0Ac, the mixture was filtered through celite and to the filtrate was added brine. The organic phase wasdried over MgS04, filtered, evaporated to dryness and purified on an Isco 40g silica gel column eluting with heptanes and ethyl acetate to afford 3-bromo-i-(3-fluoro-5-methyl-phenyl)-i,2,4-triazole HG-3a (170 mg, 26.6%). ?H NMR (300 MHz, CDC13) oe 8.43 (s, 1H), 7.29 (d, J = 2.7 Hz, 1H), 7.23 (dt, J = 9.0, 2.0 Hz, 1H), 6.97 (d, J = 9.1 Hz, 1H), 2.46 (s, 3H)ppm. ESI-MS m/z calc. 254.98074, found 257.97 (M+i) Retention time: 0.81 minutes.

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.

Electric Literature of 31599-60-7, The chemical industry reduces the impact on the environment during synthesis 31599-60-7, name is 1-Iodo-2,3-dimethylbenzene, I believe this compound will play a more active role in future production and life.

1-(bromomethyl)-3-iodo-2-methylbenzole 1-iodo-2,3-dimethylbenzole (0.7 mL, 5.0 mmol) and N-bromosuccinimide (890 mg, 5.0 mmol) were dissolved in 1,2-dichloroethane (10 mL), then 2,2′-azobisisobutyronitrile (16 mg, 0.1 mmol, 2 mol %) was added and the solution refluxed 2 h. After the reaction mixture had cooled to RT, it was diluted with 1,2-dichloroethane (40 mL) and washed with water (2*50 mL). The organic phase was dried (MgSO4) and evaporated to low bulk and used in the following synthesis step. (Yield: 9.2 g, 72%)

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, 1-Iodo-2,3-dimethylbenzene, other downstream synthetic routes, hurry up and to see.

Reference of 626-01-7, A common heterocyclic compound, 626-01-7, name is 3-Iodoaniline, molecular formula is C6H6IN, 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.

General procedure: In a 10-ml round-bottom flask equipped with a condenser, a mixture of the aromatic amine (2 mmol), ethyl acetoacetate (1 mmol), and [Pyridinium-SO3H]HSO4 (0.0,385 g, 15 mol %) was stirred at 100 C for 10 min. Afterwards, the aromatic aldehyde (2 mmol) was added, and the resulting mixture was kept under stirring for the specified time in Table 3, the progress of the reaction was followed by TLC. After completion of the reaction, the reaction mixture was cooled to room temperature, extracted by the warm EtOAc (10 ml) to separate the catalyst. EtOAc was removed and the crude product was recrystallized from aqueous ethanol (96 %) to afford the pure product, which required no further purification. The recovered catalyst was washed with EtOAc (2 x 10 ml), dried, and reused, without considerable catalytic activity decrease.

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.

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. 13194-69-9, name is 2-Iodo-5-methylaniline, A new synthetic method of this compound is introduced below., Product Details of 13194-69-9

General procedure: The corresponding pyrazinoic acid (5.0 mmol) was dispersed in dry toluene (20 mL) and mixed with 1.5eq. of thionyl chloride (0.55 mL, 7.5 mmol). The reaction mixture was heated to reflux for approximately 1 h. Next, the excess of thionyl chloride was removed by repeated evaporation with dry toluene under vacuum.The crude acyl chloride was dissolved in dry acetone(20 mL) and added drop-wise to a stirred solution of the corresponding aniline (5.0 mmol) with triethylamine(5.0 mmol) in dry acetone (30 mL). The reaction mixture was stirred at ambient temperature for up to 6 h. The completion of the reaction was monitored by TLC (eluent: hexane/ethyl acetate; r =2 : 1). The crude product adsorbed on silica gel by solvent evaporation was purified by flash chromatography(hexane/ethyl acetate gradient elution).The analytical data of the prepared compounds were fully consistent with the proposed structures and are available in the Supplementary Data.

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.