Category: iodides-buliding-blocks

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. 450412-29-0, name is 1-Bromo-3-fluoro-2-iodobenzene, A new synthetic method of this compound is introduced below., Recommanded Product: 1-Bromo-3-fluoro-2-iodobenzene

200 g (664 mmol) of 1-bromo-3-fluoro-2-iodobenzene, 101 g (664 mmol) of 2-methoxyphenylboronic acid and 137.5 g (997 mmol) of sodium tetraborate are dissolved in 1000 ml of THF and 600 ml of water, and degassed. 9.3 g (13.3 mmol) of bis(triphenylphosphine)palladium(II) chloride and 1 g (20 mmol) of hydrazinium hydroxide are added. The reaction mixture is stirred under a protective gas atmosphere at 70 C. for 48 h. The cooled solution is supplemented with toluene, washed repeatedly with water, dried and concentrated. The product is purified via column chromatography on silica gel with toluene/ heptane (1:2). Yield: 155 g (553 mmol), 83% of theory.

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.

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. 624-76-0, name is 2-Iodoethanol, This compound has unique chemical properties. The synthetic route is as follows., Quality Control of 2-Iodoethanol

[00396] To a jacketed glass reactor equipped with overhead stirring, was charged tert-butyl ((2R,3R,4R,5R)-2-(((l S,2S,3R,4S,6R)-3-(((2S,3R)-6-(aminomethyl)-3-((tert- butoxycarbonyl)amino)-3,4-dihydro-2H-pyran-2-yl)oxy)-4-((tert-butoxycarbonyl)amino)-6- ((S)-4-((tert-butoxycarbonyl)amino)-2-hydroxybutanamido)-2-hydroxycyclohexyl)oxy)-3,5- dihydroxy-5-methyltetrahydro-2H-pyran-4-yl)(methyl)carbamate, formula (6a), (250 g, 0.263 mol, 1 equiv). Acetonitrile (1250 mL) was charged to the reactor and the temperature was stabilized between 15 and 30 C (24.3 C). The mixture was concentrated under vacuum to a final volume target of 500 mL. The solution was sampled for water content by KF which provided a result of 0.22% w/w. An additional portion of acetonitrile (750 mL) was charged to the reactor and a second azeotropic distillation was performed to a volume target of 500 mL. The mixture was sampled for KF and a result of 0.097%> w/w was obtained. The reaction temperature was stabilized at 29.9 C and acetone (1250 mL) was charged to the mixture. The reaction was heated and the temperature stabilized at 29.9 C. Sodium bicarbonate (44.25 g, 0.527, 2.0 equiv) was charged to the reaction mixture followed by 2-iodoethanol (44.4 g, 20.14 mL, 0.258 mol, 0.98 equiv). After 43 h an additional portion of 2-iodoethanol (0.25 mL) was added to the reaction mixture. After 9.5 hours a third portion of 2-iodoethanol (0.3 mL) was added to the reaction mixture. After an additional 2 h, the reaction was sampled and deemed complete by HPLC analysis (consumption of tert-butyl ((2R,3R,4R,5R)-2- (((l S,2S,3R,4S,6R)-3-(((2S,3R)-6-(aminomethyl)-3-((tert-butoxycarbonyl)amino)-3,4- dihydro-2H-pyran-2-yl)oxy)-4-((tert-butoxycarbonyl)amino)-6-((S)-4-((tert- butoxycarbonyl)amino)-2-hydroxybutanamido)-2-hydroxycyclohexyl)oxy)-3,5-dihydroxy-5- methyltetrahydro-2H-pyran-4-yl)(methyl)carbamate, formula (6a),). The reaction was cooled to 22.7 C and l,4-diazabicyclo[2.2.2]octane (60.0 g, 0.535 mol, 2.03 equiv) was charged as a solid. The destruction of 2-iodoethanol was monitored by a GC method and after 10 h the quench of this reagent was deemed complete. Water (1250 mL) and isopropyl acetate (1250 mL) were charged to the reaction mixture. The reactor contents were agitated by 25 min and the layers allowed to separate. The lower aqueous layer (API) and the upper organic layer (OP1) were collected in receivers. API was returned to the reactor and a second portion of isopropyl acetate (750 mL) was charged. The reactor contents were agitated for 30 minutes and the layers allowed to separate. The lower aqueous layer (AP2) and the upper organic layer (OP2) were collected in receivers. OP1 and OP2 were combined in the reactor and extracted with two portions of saturated sodium chloride solution (750 mL, prepared by dissolving 100 g NaCl/290 mL of water). The washed organic phase (OP4) was concentrated under vacuum to a volume target of 500 mL. Acetonitrile (2550 mL) was charged to the reactor. A second azeotropic vacuum distillation was performed to a volume target of 1550 mL. Isopropyl acetate (200 mL) was charged to the mixture. Water (10.7 mL) was charged to the mixture until a KF of 0.85% was obtained. The reactor contents were heated to 75 C upon which a solution was obtained. The reaction mixture was cooled to 57 C and seeded with tert-butyl ((2R,3R,4R,5R)-2-(((l S,2S,3R,4S,6R)-4-((tert-butoxycarbonyl)amino)-6-((S)- 4-((tert-butoxycarbonyl)amino)-2-hydroxybutanamido)-3-(((2S,3R)-3-((tert- butoxycarbonyl)amino)-6-(((2-hydroxyethyl)amino)methyl)-3,4-dihydro-2H-pyran-2- yl)oxy)-2-hydroxycyclohexyl)oxy)-3,5-dihydroxy-5-methyltetrahydro-2H-pyran-4- yl)(methyl)carbamate, formula (7a), (5 g, 0.0050 mol, 0.02 equiv). Stirring was maintained at 57 C for 2 h during which a thick slurry formed. The mixture was cooled from 65 C to 2.5 C over a period of 12 h. The slurry was filtered and washed with acetonitrile (900 mL) and dried in a vacuum oven to afford tert-butyl ((2R,3R,4R,5R)-2-(((l S,2S,3R,4S,6R)-4-((tert- butoxycarbonyl)amino)-6-((S)-4-((tert-butoxycarbonyl)amino)-2-hydroxybutanamido)-3- (((2S,3R)-3-((tert-butoxycarbonyl)amino)-6-(((2-hydroxyethyl)amino)methyl)-3,4-dihydro- 2H-pyran-2-yl)oxy)-2-hydroxycyclohexyl)oxy)-3,5-dihydroxy-5-methyltetrahydro-2H-pyran- 4-yl)(methyl)carbamate, formula (7a), (218.1 g, 0.220 mol, 83% molar yield)

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 624-76-0.

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.

Synthetic Route of 76801-93-9, These common heterocyclic compound, 76801-93-9, name is 5-Amino-N1,N3-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide, 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.

5-Amino-1,3-N,N’-bis-(2,3-dihydroxypropyl)-2,4,6-triiodoisophtalamide (40.0 g, 56.7 mmol) was suspended in pyridine (80 ml). With effective stirring and cooling in an ice/water bath, acetic anhydride (70 ml) was added dropwise. After addition the mixture was stirred at ambient temperature over night. The clear solution was evaporated to an oil, which was dissolved in ethyl acetate (450 ml). This solution was washed with diluted hydrochloric acid (0.05 M, 100 ml), water (200 ml), diluted solution of sodium hydrogen carbonate (5 %, 2 × 100 ml) and at last a saturated solution of sodium chloride (70 ml). The organic phase was dried (NaSO4) and the solvent evaporated to a white crystalline substance. Yield 49.5 g (= quantitative). 1H NMR (CDCl3): 6.71 & 6.38 (two t:s, 2H), 5.24 (br. s, 2H), 5.09 (s, 2H), 4.37 – 4.48 & 4.22 – 4.35 (m:s, 4H), 3.71 – 3.85 & 3.50 – 3.65 (m:s, 4H), 2.06 (s, 12H).

Statistics shows that 5-Amino-N1,N3-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide is playing an increasingly important role. we look forward to future research findings about 76801-93-9.

Adding a certain compound to certain chemical reactions, such as: 811842-30-5, name is 2-Bromo-1-fluoro-4-iodobenzene, belongs to iodides-buliding-blocks 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 811842-30-5, Application In Synthesis of 2-Bromo-1-fluoro-4-iodobenzene

2-Bromo-l-fluoro-4-iodobenzene (890 mg, 7.6 mmol), dichlorobis(triphenylphosphine)palladium (27 mg, 0.038 mmol) and copper(I) iodide (7 mg, 0.038 mmol) were dissolved in anhydrous tetrahydrofuran (30 mL) and triethylamine (15 mL). 4-Ethynyl-2-methylpyridine (890 mg, 7.6 mmol) was added, the reaction stirred at room temperature for 3 h and then neutralized using hydrochloric acid (2 M). The solution was extracted with dichloromethane and the combined organic phases were concentrated in vacuo. Purification by column chromatography, using a gradient of ethyl acetate (0 to 40%) in «-heptane as the eluent, gave 1.4 g (63% yield) of the title compound: MS (ESI) m/z 426 [M+l]+.

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-Bromo-1-fluoro-4-iodobenzene, other downstream synthetic routes, hurry up and to see.

Electric Literature of 108078-14-4, 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. 108078-14-4, name is 2-Iodo-3-methylbenzoic acid, This compound has unique chemical properties. The synthetic route is as follows.

2-iodo-3-methyl benzoic acid (1310 mg, 5 mmol) and thionyl chloride (730 uL, 10 mmol) were dissolved into THF (10 mL) and stirred at RT for 4 days. The solvents were removed IN VACUO and the resulting residue was dissolved into EtOAc, washed with brine. The combined organic layers were dried (MGS04) and the solvents were removed in vacuo resulting in an oil that was used without further purification or characterization.

The chemical industry reduces the impact on the environment during synthesis 2-Iodo-3-methylbenzoic acid. I believe this compound will play a more active role in future production and life.

Electric Literature of 460-37-7, These common heterocyclic compound, 460-37-7, name is 1,1,1-Trifluoro-3-iodopropane, 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.

Example 91Preparation of Compound 496Step A – synthesis of compound 9JBCompound 91 A (5.Og, 22mol) was added to Mg turnings (0.7Og, 29mga) and catalytic iodine in ether (3OmL). After Ih, the reaction was cooled to 0 0C and treated with benzaldehyde (2.08g, 20mmol). After Ih , satd. NH4Cl was added (10OmL). The ether was concentrated to leave a yellow oil, taken up in CH2Cl2 (4OmL), and treated with PCC (12.0g, 56mmol) for 4h. Hexane (30ml) was added, the solid filtered and concentrated to give crude compound 91B as a yellow solid.

Statistics shows that 1,1,1-Trifluoro-3-iodopropane is playing an increasingly important role. we look forward to future research findings about 460-37-7.

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. 89459-38-1, name is 2-Iodo-4-nitrobenzoic acid, This compound has unique chemical properties. The synthetic route is as follows., Computed Properties of C7H4INO4

A flame-dried 3 E 3-necked flask was charged with Example 2.12310 (51.9 g) and tetrahydrofuran (700 mL). The mixture was cooled in an ice bath to 0.5 C and borane-tetrahydrofuran complex (443 mL, 1M in THF) was added dropwise (gas evolution) over 50 minutes, reaching a final internal temperature of 1.3 C. The reaction mixture was stirred for 15 minutes, and the ice bath was removed. The reaction was left to come to ambient temperature over 30 minutes. A heating mantle was installed, and the reaction was heated to an internal temperature of 65.5 C. for 3 hours, and then allowed to cool to room temperature while stirring overnight. The reaction mixture was cooled in an ice bath to 0 C. and quenched by dropwise addition of methanol (400 mL). Afier a brief incubation period, the temperature rose quickly to 2.5 C. with gas evolution. After the first 100 mE are added over 30 minutes, the addition was no longer exothermic, and the gas evolution ceased. The ice bath was removed, and the mixture was stirred at ambient temperature under nitrogen overnight. The mixture was concentrated to a solid, dissolved in dichloromethane/methanol and adsorbed on to silica gel (.-150 g). The residue was loaded on a plug of silica gel (3000 mE) and eluted with dichloromethane to give the title compound.

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 89459-38-1.