Category: ethers-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. 5467-58-3, name is 1-Bromo-4-methoxynaphthalene, A new synthetic method of this compound is introduced below., Application In Synthesis of 1-Bromo-4-methoxynaphthalene

An excess of 1.6 M n-BuLi in hexane(162 ml, 258 mmol) was added to a solution of 1-bromo-4-methoxynaphthalene(50.9 g, 215 mmol) in 800 ml dry tetrahydrofuran at -78 C. under N2. The reaction mixture was then maintained at 0 C. for 1 h before cooling to -78 C. Trimethylborate(35 g, 335 mmol) was added dropwise; the solution was then warmed slowly to room temperature and stirred for 24 h. 2N HCl (250 ml)was added and then the mixture was stirred for a further 1 h. The reaction mixture was extracted with ethyl acetate and water, dried with anhydrous magnesium sulfate, the solvent was evaporated in vacuo, and the residue was crystallized(n-hexane) to give the 4-methoxynaphthalen-1-ylboronic acid (31.8 g, 157 mmol, 61%) as a white solids.

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.

These common heterocyclic compound, 5473-01-8, name is 2-Bromo-6-methoxyaniline, 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. name: 2-Bromo-6-methoxyaniline

To a cooled (in an ice bath) suspension of 6-bromo-2-anisidine (63.52 g, 0.314 mol) in concentrated hydrochloric acid (130 ml) was added dropwise a solution of sodium nitrite (22 g, 0.32 mol) in water (100 ml) while the temperature was kept below 5 °C. After stirring for a further 30 min at 4 °C the red solution of the diazo compound was filtered and to the filtrate the chilled solution of tin(II) chloride dihydrate (175 g, 0.78 mol) in concentrated hydrochloric acid (200 ml) was added dropwise while occasionally adding water (all together ca. 500 ml water were added), while hydrazine hexachlorostannane precipitated. The reaction mixture was allowed to warm to room temperature and stirred for 3 h, after which the product was filtered off, and washed with saturated brine once. The solid was dissolved by the careful addition to a chilled aqueous solution of 25percent sodium hydroxide (200 ml) containing ca. 40 g of potassium tartrate. The product was extracted with dichloromethane (4 .x. 50 ml). The combined organic layers were washed with 2 M NaOH and water, dried over MgSO4 and evaporated to give 59.4 g (87percent) of desired product as a tan solid. Mass spectrum, m/z (I rel., percent): 219 (9), 218 (95), 217(10), 216 (100), 203 (64), 201(74), 200 (83), 198 (80), 186 (39).

The synthetic route of 2-Bromo-6-methoxyaniline has been constantly updated, and we look forward to future research findings.

Application of 171290-52-1, These common heterocyclic compound, 171290-52-1, name is 3,5-Dimethoxyphenylacetylene, 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: To a solution of the azide intermediate (0.1 mmol) in 0.2 mL of DMFin a microwave tube, CuSO4 (0.05 mmol) diluted in 50.0 muL of water,sodium ascorbate (0.025 mmol) and the alkyne (0.2 mmol) were added.The tube was sealed and the solution was irradiated (70 C, 150 W) for10 min and, then, TLC analysis showed the complete consumption ofthe starting material. The reaction was diluted with 15 mL of brine,extracted with ethyl acetate (3×10 mL), dried by anhydrous Na2SO4and concentrated under reduced pressure. The resulting crude productwas purified by column chromatography on silica gel [hexane: ethylacetate, 60:40% (v/v)] yielding the expected product.

Statistics shows that 3,5-Dimethoxyphenylacetylene is playing an increasingly important role. we look forward to future research findings about 171290-52-1.

Some common heterocyclic compound, 456-49-5, name is 1-Fluoro-3-methoxybenzene, molecular formula is C7H7FO, 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. Computed Properties of C7H7FO

The 3-fluoro anisole (15 g, 119 mmol) was placed in THF (300 mL) and cooled to about -78 C., and then n-BuLi (89 mL 1.6 M in hexanes) was added while maintaining the temperature at around -70 C. The mixture was stirred for about 15 minutes, and bromine (18.9 g, 119 mmol) was added over 10 minutes. The mixture was warmed to r.t. and stirred overnight. The mixture was quenched with water, diluted with ether (500 mL) and partitioned between water/ether (1/1 300 mL). The water layer was back extracted with ether (250 mL), and the combined organic fractions were dried, filtered and concentrated. The dark residue was distilled under house vacuum (product 115-130 C.) to recover about 13.8 g of the product as a gray oil (57%/).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 456-49-5, its application will become more common.

Related Products of 204452-91-5, 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. 204452-91-5 name is 7-(Dimethoxymethyl)-1,2,3,4-tetrahydro-1,8-naphthyridine, 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.

The compound (12 g, 57.6 mmol) prepared in the above step 2 was dissolved in acetonitrile (192 ml), and N-bromosuccinimide (NBS) (10.77 g, 60.5 mmol) was slowly added at room temperature. After the reaction mixture was stirred at room temperature for 30 minutes, And concentrated under reduced pressure. After extracting the reaction residue obtained from the above with diethyl ether and ice water, The organic layer was washed with brine, dried over sodium sulfate, concentrated under reduced pressure, and purified by MPLC to obtain yellow To give the desired compound (11 g, 66%).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 7-(Dimethoxymethyl)-1,2,3,4-tetrahydro-1,8-naphthyridine, and friends who are interested can also refer to it.

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. 7252-83-7, name is 2-Bromo-1,1-dimethoxyethane belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Recommanded Product: 7252-83-7

As described by Doel et al.,13 a solution of adenine or thymine (1 equiv) and K2CO3 (1 equiv) in DMF (10 mL) was stirred at 100 C in the presence of 2-bromo-1,1-dimethoxyethane (1.1 equiv). After 24 h, the reaction was filtered and the solvent removed under reduced pressure. The crude mixture was purified by column chromatography in silica gel with MeOH: CH2Cl2 or EtOAc: hexane as mobile phase. Corresponding 9-(2,2-dimethoxyethyl)-adenine and 1-(2,2-dimethoxyethyl)-thymine were obtained in 61% and 38% isolated yields respectively. Both acetals were completely hydrolyzed after 1 h stirring in HCl 1 N at 90 C, to yield the corresponding aldehydes.20

The synthetic route of 7252-83-7 has been constantly updated, and we look forward to future research findings.

Related Products of 120-11-6, 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. 120-11-6, name is 1-(Benzyloxy)-2-methoxy-4-(prop-1-en-1-yl)benzene belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

General procedure: The mixture of the substrate (0.250 mmol), 0.5% Pd/MS3A or 0.5% Pd/MS5A (10 wt % of the substrate) and MeOH (1 mL) was stirred under H2 atmosphere (balloon) at room temperature. After a given period, the reaction mixture was filtered through a membrane filter (Millipore, Millex-LH, 0.45 mm), and the filtrate was concentrated in vacuo to produce the corresponding reduced product.

The synthetic route of 1-(Benzyloxy)-2-methoxy-4-(prop-1-en-1-yl)benzene has been constantly updated, and we look forward to future research findings.

Adding a certain compound to certain chemical reactions, such as: 944317-92-4, name is 1-Bromo-4-fluoro-5-isopropyl-2-methoxybenzene, belongs to ethers-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 944317-92-4, SDS of cas: 944317-92-4

lOg (0.0405 mol) product 4, 11.05g(0.04455 mol) 2-methoxycarbonyl-4- trifiuromethylphenylboronic acid, 2.45g tetra-(triphenylphosphine) palladium, 16g anhydrous potassium carbonate and 100 ml tetrahydrofuran were added into a 250 mL 3-neck fiaskto form a suspension. The mixture was heated to reflux overnight, then cooled to room temperature, filtered, poured into 300 mL water, and was extracted by 3><300 mL ethyl acetate. The organic phase was washed by saturated NaCl solution, dried by anhydrous Na2S04 and distilled under vacuum to obtain a yellow solid. Recrystallization in ethyl acetate gave 7.82g of product 5. 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.

Reference of 38336-04-8,Some common heterocyclic compound, 38336-04-8, name is 2-(Benzyloxy)-1-ethanamine, molecular formula is C9H13NO, 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.

Ethyl 2-(4-chloro-3-nitrophenyl)-2-methylpropanoate (3a)(16.15 g, 0.0594 mol), 4 (27.77 g, 0.149 mol), K2CO3 (28.69 g,0.208 mol), KI (0.99 g, 5.94 mmol), TBAB (1.91 g, 5.94 mmol) and150 mL DMSO were added into a round-bottomed flask. The mixturewas heated to 120 C for 24 h then cooling to room temperature.The reaction mixture was diluted with saturated NH4Claqueous solution (250 mL) and extracted with CH2Cl2 (450 mL).The combined organic layer was washed with brine (300 mL), driedover anhydrous sodium sulfate, filtered, and concentrated in vacuo.The residue was purified by silica gel column chromatography (PE:EtOAc = 4:1) to give compound 5a (15.82 g) as yellow oil in 69%yields. 1H NMR (300 MHz, CDCl3) d (ppm) 8.27 (s, 1H), 8.19 (d,J = 2.4 Hz, 1H), 7.41-7.30 (m, 5H), 6.84 (d, J = 9.0 Hz, 1H), 4.61 (s,2H), 4.13 (q, J = 7.1 Hz, 2H), 3.77 (t, J = 5.4 Hz, 2H), 3.53 (q,J = 5.3 Hz, 2H), 1.58 (s, 5H), 1.21 (t, J = 7.1 Hz, 3H).

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

Some common heterocyclic compound, 22483-09-6, name is 2,2-Dimethoxyethanamine, molecular formula is C4H11NO2, 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. COA of Formula: C4H11NO2

General procedure: A solution of amino acetaldehyde dimethyl acetal 2a (10. 514 g, 1.081 mL, 10 mmol), purchased from Alfa Aesa, and an aldehyde (10 mmol) in dry ethanol was placed in a round bottom flask and stirred for 12 h. To that solution, sodium borohydride powder (0.567 g, 15 mmol) was added at 0 C slowly over 5 minutes. the solution was then warmed to room temperature. After stirring for 4 h, the reaction was quenched with 3 drops of water and the mixture was filtered through a pad of celite. The solvent was evaporated under reduced pressure, the residue was extracted with 100 mL of ethyl ether and washed with100 mL of water. The organic layer was dried over MgSO4 anhydrous. Ethyl ether was then evaporated and the resulted viscous liquid was purified by flash column chromatography (SiO2; 4:1 then 3:1 and finally 1:1hexanes/ethyl acetate).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 22483-09-6, its application will become more common.