Month: March 2022

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Cyclization of N-arylcyclopropanecarboxamides into N-arylpyrrolidinones-2 under electron ionization and in the condensed phase, published in 2016, which mentions a compound: 7661-33-8, Name is 1-(4-Chlorophenyl)pyrrolidin-2-one, Molecular C10H10ClNO, Formula: C10H10ClNO.

Mass spectrometry is known as an excellent method to predict the behavior of organic compounds in solution The behavior of organic compounds in the gas-phase inside an ion source of a mass spectrometer allows their intrinsic properties to be defined, avoiding the influence of intermol. interactions, counter ions and solvent effects. Arylpyrrolidinones-2 were obtained by condensed phase synthesis from the corresponding N-arylcyclopropanecarboxamides. Electron ionization (EI) with accurate mass measurements by high-resolution time-of-flight mass-spectrometry and quantum chem. calculations were used to understand the behavior of the mol. radical cations of N-arylcyclopropanecarboxamides and N-arylpyrrolidinones-2 in the ion source of a mass spectrometer. The geometries of the mols., transition states, and intermediates were fully optimized using DFT-PBE calculations Fragmentation schemes, ion structures, and possible mechanisms of primary isomerization were proposed for isomeric N-arylcyclopropanecarboxamides and N-arylpyrrolidinones-2. Based on the fragmentation pattern of the N-arylcyclopropanecarboxamides, isomerization of the original M+· ions into the M+· ions of the N-arylpyrrolidinones-2 was shown to be only a minor process. On the contrary, this cyclization proceeds easily in the condensed phase in the presence of the Bronsted acids. Based on the exptl. data and quantum chem. calculations the principal mechanism of decomposition of the mol. ions of N-arylcyclopropanecarboxamides involves their direct fragmentation without any rearrangements. An alternative mechanism is responsible for the isomerization of a small portion of the higher energy mol. ions into the corresponding N-arylpyrrolidinones-2 ions.

Here is a brief introduction to this compound(7661-33-8)Formula: C10H10ClNO, if you want to know about other compounds related to this compound(7661-33-8), you can read my other articles.

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Name: Dichloro(1,5-cyclooctadiene)platinum(II). The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about Confined Spaces in [n]Cyclo-2,7-pyrenylenes. Author is Grabicki, Niklas; Nguyen, Khoa T. D.; Weidner, Steffen; Dumele, Oliver.

A set of strained aromatic macrocycles based on [n]cyclo-2,7-(4,5,9,10-tetrahydro)pyrenylenes is presented with size-dependent photophys. properties. The K-region of pyrene was functionalized with ethylene glycol groups to decorate the outer rim and thereby confine the space inside the macrocycle. This confined space is especially pronounced for n=5, which leads to an internal binding of up to 8.0×104 M-1 between the ether-decorated [5]cyclo-2,7-pyrenylene and shape-complementary crown ether-cation complexes. Both the ether-decorated [n]cyclo-pyrenylenes as well as one of their host-guest complexes have been structurally characterized by single-crystal X-ray anal. In combination with computational methods the structural and thermodn. reasons for the exceptionally strong binding have been elucidated. The presented rim confinement strategy makes cycloparaphenylenes an attractive supramol. host family with a favorable, size-independent read-out signature and binding capabilities extending beyond fullerene guests.

Here is a brief introduction to this compound(12080-32-9)Name: Dichloro(1,5-cyclooctadiene)platinum(II), if you want to know about other compounds related to this compound(12080-32-9), you can read my other articles.

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Electric Literature of C10H10ClNO. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Facile CuI-catalyzed arylation of azoles and amides using simple enaminones as efficient ligands. Author is Cheng, Cungui; Sun, Gonglei; Wan, Jieping; Sun, Cuirong.

(E)-3-(Dimethylamino)-1-(2-hydroxyphenyl)prop-2-en-1-one was found to be an excellent ligand for copper-catalyzed N-arylation of azoles and amides with aryl halides under mild conditions. The reaction took place at 82 °C in MeCN with broad functional-group compatibility. A combination of the ligand and CuI proved to be an efficient catalytic system to promote the coupling reactions of aryl halides with azoles and amides.

Here is a brief introduction to this compound(7661-33-8)Electric Literature of C10H10ClNO, if you want to know about other compounds related to this compound(7661-33-8), you can read my other articles.

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Quality Control of tert-Butyl 5-bromo-1H-indazole-1-carboxylate. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: tert-Butyl 5-bromo-1H-indazole-1-carboxylate, is researched, Molecular C12H13BrN2O2, CAS is 651780-02-8, about Microwave-assisted Transition Metal-catalyzed Coupling Approach to Indazole Diversity. Author is Oh, Yoo Jin; Yum, Eul Kgun.

Diverse mono or biaryl substituents were introduced to indazole moieties under microwave-assisted palladium-catalyzed coupling reactions with isomeric bromoindazoles and aryl boronic acids. 1,3-Disubstituted indazoles were also obtained by C=C or C-N coupling of monosubstituted indazoles with functionalized terminal alkenes and arylhalides. Facile introduction of diverse substituents to indazoles showed useful synthetic approach for creating indazole compound library to discover biol. active small mols.

Here is a brief introduction to this compound(651780-02-8)Quality Control of tert-Butyl 5-bromo-1H-indazole-1-carboxylate, if you want to know about other compounds related to this compound(651780-02-8), you can read my other articles.

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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Synthesis and ultraviolet spectra of nitrodiphenyl-amine disperse dyes. II. Synthesis of some substituted 2- and 4-nitrodiphenylamines, published in 1967, which mentions a compound: 16588-26-4, mainly applied to DIPHENYLAMINES DISPERSE DYE; DYE DIPHENYLAMINES DISPERSE; DISPERSE DYE DIPHENYLAMINES, Safety of 3-Bromo-4-chloronitrobenzene.

The synthesis of some substituted 2- and 4-nitrodiphenylamines, yellow dyes for synthetic fibers, is described. Condensation of 0.02 mole 2,5-Cl2C6H3NO2 with 0.04 mole PhNH2 in 50 ml. boiling EtOH containing 3 g. NaOAc gave 52.8% I (R = NO2, R1 = Cl, R2 = R3 = R4 = H), m. 59-60° (75% aqueous alc.). Other I were prepared similarly (R, R1, R2, R3, R4, % yield, and m.p. given): NO2, Cl, OMe, H, H, 50, 100-1°; NO2, Cl, H, OMe, H, 37, 90°; NO2, Cl, H, H, OMe, 48, 118-19°; NO2, Cl, F, H, H, 21, 113-14°; NO2, Cl, H, F, H, 40, 99-100°; NO2, Cl, H, H, F, 38, 80-1°; NO2, Cl, H, H, SO2Me, 15, 210-11°; CF3, NO2, H, H, H, 71, 63-4°; CF3, NO2, OMe, H, H, 16, 106-7°; CF3, NO2, H, OMe, H, 32, 88°; CF3, NO2, H, H, OMe, 74, 87-8°; CF3, NO2, F, H, H, 30, 60-1°; CF3, NO2, H, F, H, 57, 73-4°; CF3, NO2, H, H, F, 20, 74-5°; MeSO2, NO2, H, H, H, 82, 169-70°; Me, NO2, H, H, H, 23, 133-4°; NO2, Me, H, H, H, 79, 34-5°; NO2, OMe, H, H, H, 23, 44-5°. Fusion of 0.02 mole 3,4-Cl2C6H3NO2 (II) with 0.04 mole PhNH2 gave 31.8% I (R = Cl, R1 = NO2, R2 = R3 = R4 = H), m. 112-13°. Other I (R = Cl, R1 = NO2) were prepared similarly (R2, R3, R4, % yield, and m.p. given): OMe, H, H, 36, 108-9°; H, OMe, H, 25, 122-3°; H, H, OMe, 32, 99-100°; H, H, F, 20, 119-20°. Condensation of 0.02 mole 4,3-Cl(O2N)C6H3SO2NH2 (III) and 0.03 mole PhNH2 by fusing for 6 hrs. at 130° gave 71.8% I (R = NO2, R1 = SO2NH2, R2 = R3 = R4 = H), m. 179-80°. Other I (R = NO2, R1 = SO2NH2) were prepared similarly (R2, R3, R4, % yield, and m.p. given): Me, H, H, 84, 195-6°; H, Me, H, 85, 172-3°; H, H, Me, 90, 196-7°; OMe, H, H, 41, 225-6°; H, OMe, H, 91, 181-2°; H, H, OMe, 89, 226-7°; F, H, H, 61, 206-7°; H, F, H, 77, 195-6°; H, H, F, 80, 234-5°; Cl, H, H, 42, 202-3°; H, Cl, H, 80, 201-2°; H, H, Cl, 80, 241-2°; Br, H, H, 60, 200-1°; H, Br, H, 79, 207-8°; H, H, Br, 84, 235-6°; CF3, H, H, 40, 169-70°; H, CF3, H, 82, 210-11°; H, H, CF3, 29, 260-1°; H, H, SO2Me, 59, 253-4°. Condensation of 4.7 g. 2,5-Cl(O2N)C6H3SO2NH2 (IV) with 0.04 mole PhNH2 in 100 ml. boiling PhNO2 for 24 hrs. gave 68.4% I (R = SO2NH2, R1 = NO2, R2 = R3 = R4 = H), m. 175-6°. Other I (R = SO2NH2, R1 = NO2) were prepared similarly (R2, R3, R4, % yield, and m.p. given): OMe, H, H, 62, 205-8°; H, OMe, H, 59, 172-4°; H, H, OMe, 65, 160°; F, H, H, 60, 182-3°; H, F, H, 68, 173-4°; H, H, F, 71, 162-4°. A mixture of 25 g. 4,3-Cl(O2N)C6H3CO2H and 50 ml. SOCl2 was refluxed for 2 hrs., stripped of excess SOCl2, and treated with excess NH4OH to give 86.4% 4,3-Cl(O2N)C6H3CONH2, m. 154-5° (EtOH), which (0.02 mole) was condensed with 0.04 mole PhNH2 in EtOH containing NaOAc to give 34.4% I (R = NO2, R1 = CONH2, R2 = R3 = R4 = H), m. 194-5°. Other I were prepared similarly (R, R1, R2, R3, R4, % yield, and m.p. given): NO2, CONH2, OMe, H, H, 68, 144-5°; NO2, CONH2, H, OMe, H, 72, 170-1°; NO2, CONH2, H, H, OMe, 68, 220-1°; NO2, CONH2, F, H, H, 60, 169-71°; NO2, CONH2, H, F, H, 67, 191-2°; NO2, CONH2, H, H, F, 78, 207-8°; NO2, CONH2, H, H, SO2Me, 10, 244-5°; CONH2, NO2, H, H, H, 25, 184-5°; CONH2, NO2, OMe, H, H, 59, 215-16°; CONH2, NO2, H, OMe, H, 55, 198-9°; CONH2, NO2, H, H, OMe, 79, 216-17°; CONH2, NO2, F, H, H, 49, 184-5°; CONH2, NO2, H, F, H, 43, 233-4°; CONH2, NO2, H, H, F, 82, 231-2°; CONH2, NO2, H, H, SO2Me, 7, 207-8°. Esterification of 4,3-Cl(O2N)C6H3CO2H gave 4,3-Cl(O2N)C6H3CO2Et, m. 60-1° (EtOH), which was condensed with PhNH2 in boiling EtOH to give 92.8% I (R = NO2, R1 = CO2Et, R2 = R3 = R4 = H), m. 114-15°. Other I were prepared similarly (R, R1, R2, R3, R4, % yield, and m.p. given): NO2, CO2Et, OMe, H, H, 72, 116-18°; NO2, CO2Et, H, OMe, H, 70, 105-6°; NO2, CO2Et, H, H, OMe, 63, 128-9°; NO2, CO2Et, F, H, H, 15, 120-2°; NO2, CO2Et, H, F, H, 69, 79-80°; NO2, CO2Et, H, H, F, 52, 138-9°; NO2, CO2Et, H, H, SO2Me, 13, 149-50°; CO2Et, NO2, H, H, H, 29, 111-12°; CO2Et, NO2, OMe, H, H, 41, 112-13°; CO2Et, NO2, H, OMe, H, 46, 81-2°; CO2Et, NO2, H, H, OMe, 56, 120-2°; CO2Et, NO2, F, H, H, 18, 105°; CO2Et, NO2, H, F, H, 59, 119-20°; CO2Et, NO2, H, H, F, 34, 121-2°; CO2Et, NO2, H, H, SO2Me, 10, 189-90°; NO2, CF3, H, H, H, 63, 84°; NO2, CF3, OMe, H, H, 39, 123-4°; NO2, CF3, H, OMe, H, 81, 67-8°; NO2, CF3, H, H, OMe, 80, 85-6°; NO2, CF3, F, H, H, 76, 77-8°; NO2, CF3, H, F, H, 70, 93°; NO2, CF3, H, H, F, 54, 77-8°; NO2, CF3, H, H, SO2Me, 10, 149-50°. Nitration of p-ClC6H4SO2Me with KNO3 in concentrated H2SO4 at 80-5° for 3 hrs. gave 81.7% 4,3-Cl(O2N)C6H3SO2Me, m. 121-2° (20% aqueous alc.), which was condensed with PhNH2 to give 92% I (R = NO2, R1 = SO2Me, R2 = R3 = R4 = H), m. 130-1°. A solution of 15 g. 0-ClC6H4CN in fuming HNO3 was allowed to warm to room temperature from 0-4° in 1 hr., kept for 1 hr. at room temperature, and mixed with 600 ml. ice-water to give 81.8% 2,5-Cl(O2N)C6H3CN, m. 108° (EtOH), which was condensed with PhNH2 in the presence of NaOAc to give 78% I (R = CN, R1 = NO2, R2 = R3 = R4 = H), m. 159-60°. Similarly prepared was I (R = NO2, R1 = CN, R2 = R3 = R4 = H), m. 121-2°. A suspension of 21.7 g. 4,2-Br(O2N)C6H3NH2 in 85 ml. concentrated HCl at 0-4° was diazotized with NaNO2, stirred 1 hr. at 5°, mixed with 15 g. CuCl2 in 50 ml. concentrated HCl, warmed to 70° in 1 hr., and stirred for 30 min. at 70° and overnight at room temperature to give 50% 5,2-Br(Cl)C6H3NO2, m. 70-1° (20% aqueous alc.), which was condensed with PhNH2 to give 80.5% I (R = NO2, R1 = Br, R2 = R3 = R4 = H), m. 54-6°. Similarly prepared were I (R = Br, R1 = NO2, R2 = R3 = R4 = H), m. 111-12°. I (R = NO2, R1 = F, R2 = R3 = R4 = H), m. 120-1°, and I (R = F, R1 = NO2, R2 = R3 = R4 = H), m. 134°. Nitration of 4-ClC6H4CHO gave 80% 4,3-Cl(O2N)C6H3CHO, m. 65-6° (EtOH), which was condensed with PhNH2 in the presence of NaOAc to give a mixture of I (R = NO2, R1 = CHO, R2 = R3 = R4 = H), m. 147-8°, and 4,3-PhNH(O2N)C6H3CH:NPh, m. 108-9°. Similarly prepared was 2,5-PhNH(O2N)C6H3CHO, m. 182° (by-product and m. 132-3°). Attempted conversion of II with 2-, 3-, or 4-FC6H4NH2 or with 3-MeOC6H4NH2 in refluxing HCONMe2 gave 75-85% 2,4-Cl(O2N)C6H3NMe2, m. 78°. Similarly, III and 2- or 4-F3CC6H4NH2 in HCONMe2 gave 4,3-Me2N(O2N)C6H3SO2NH2, m. 133-4°, while IV with all arylamines in HCONMe2 gave 2,5-Me2N(O2N)C6H3SO2NH2, m. 147-8° (EtOH).

Here is a brief introduction to this compound(16588-26-4)Safety of 3-Bromo-4-chloronitrobenzene, if you want to know about other compounds related to this compound(16588-26-4), you can read my other articles.

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Electric Literature of 1570-95-2, With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.1570-95-2, name is 2-Phenylpropane-1,3-diol, molecular formula is C9H12O2, molecular weight is 152.19, as common compound, the synthetic route is as follows.

A flask was charged with 1.00 part of F-Diol and 9.50 parts of THF. The resulting solution was treated with 2.39 parts of 1,1′-carbonyldiiumidazole (CDI) in a single portion. After several hours a heavy precipitate formed which was stirred an additional 18-24 h. Next, 1.00 part of powdered activated molecular sieves (4 , 25mu) was added followed by 3.4 parts of ammonium carbonate. The slurry was stirred for 18-24 h, then treated with an additional 3.4 parts of ammonium carbonate. After an additional 18-24 h, the reaction mixture was allowed to settle for 2-24 h and the supernatant was removed. The remaining slurry was treated with ethyl acetate (5 parts), stirred, and filtered to remove solids. The filter cake was washed three times with 2.5 parts each of ethyl acetate. The organic phases were combined and concentrated to an oil, then dissolved in 5 parts ethyl acetate, and washed with 2.5 parts of water then 3 parts of 6 N hydrochloric acid. (An additional wash may be necessary if the pH of the aqueous acid wash is still basic by pH paper.) The ethyl acetate layer was then washed with 3 parts brine solution followed by 3 parts of sodium bicarbonate. The organic layer was dried over 1.0 part sodium sulfate, filtered, and concentrated in vacuo, while maintaining a bath temperature of 60-80 C., to a light-syrup (leaving approximately 1-2 parts ethyl acetate). This solution was then added to 5 parts of MTBE with stirring at which point crystallization commenced. The resulting white slurry was stirred 14-24 h and the solids were isolated by filtration and dried in vacuo at 60 C. The yield of crude 2-fluoro-2-phenyl-1,3-propanediol dicarbamate is typically 78-85% of theoretical. HPLC analysis indicated >98-99% (AUC) purity along with 0.5% 2-phenyl-1,3-propanediol and 0.3-0.5% 2-fluoro-2-phenyl-1,3-propanediol monocarbamate (?F-monocarbamate?). The crude product was further purified by dissolving 1.00 part fluorofelbamate in 10 parts of hot methanol-water (1:4). Cooling to ambient temperature and stirring overnight, followed by filtration, afforded the title compound as a white crystalline solid. Yields of crystallization processes are typically 93-97%. HPLC analysis indicated >99.5% AUC fluorofelbamate. Typically, less than 0.35% felbamate is present by HPLC. 1H-NMR (d6-DMSO, 500 MHz) 67 7.50-7.20 (m, 5 H, PhH), 6.8-6.2 (bd, 4 H, NH2), 4.42-4.20 (m, 4 H, CH2). Under the HPLC conditions described for Example 3, the retention times were: F-Diol (5.8 min), Diol (6.2 min), monocarbamate (8.8 min), F-monocarbamate (9.3 min), felbamate (12.3 min), fluorofelbamate (15.8 min).

The chemical industry reduces the impact on the environment during synthesis 1570-95-2, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Mortko, Henry; He, Weixuan; Andersen, Marc W.; Dotse, Anthony K.; Li, Jie; US2006/241298; (2006); A1;,
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Adding a certain compound to certain chemical reactions, such as: 61266-36-2, Methyl 4-(3-hydroxyprop-1-yn-1-yl)benzoate, 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, SDS of cas: 61266-36-2, blongs to alcohols-buliding-blocks compound. SDS of cas: 61266-36-2

Compound 9 was prepared according to Scheme 7. [ Reaction of methyl 4-bromobenzoate (9. 1) with propargyl alcohol (9. 2) under Sonogashira conditions afforded compound 9. 3. Hydrogenation 9. 3 Obtaining compound 9. 4. Obtaining the acid after hydrolysis of the ester and subsequent treatment with acrylic acid under Dean and Stark conditions. The acid was reacted with intermediate 2 (3.6) to obtain diester 9. 7 and further reacted with diiodobenzene under Sonogashira conditions to obtain the target compound 9. 8

The synthetic route of 61266-36-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Merck Patent Gmbh / Merck patent Co.Ltd; Adlem, K; Parry, O. L; Skjonnemand, K; Wilkes, D; (51 pag.)CN103254083; (2016); B;,
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Adding a certain compound to certain chemical reactions, such as: 222978-01-0, (4-Bromo-3-fluorophenyl)methanol, 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, Computed Properties of C7H6BrFO, blongs to alcohols-buliding-blocks compound. Computed Properties of C7H6BrFO

To a solution of (4-bromo-3-fluoro-phenyl)-methanol (410 mg, 2.0 mmol) and imidazole (163 mg, 2.4 mmol) in DMF (10 mL) was added triisopropylsilyl chloride (0.472 mL, 2.2 mmol). The reaction mixture was stirred at room temperature for 18 hours and then partitioned between ethyl acetate and water. The organic layer was isolated, washed with brine, dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was purified by flash chromatography (Si-SPE, pentane) to provide the title compound as a colourless oil (643 mg, 89%). IH NMR (CDCl3, 400MHz) 7.48 (dd, J=8.1, 7.0 Hz, IH), 7.16 (d, J = 9.7 Hz, IH), 6.99 (d, J=8.7 Hz, IH), 4.78 (s, 2H), 1.04-1.24 (m, 21H).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,222978-01-0, (4-Bromo-3-fluorophenyl)methanol, and friends who are interested can also refer to it.

Reference:
Patent; GENENTECH, INC.; WO2008/24725; (2008); A1;,
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Synthetic Route of 92409-15-9, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 92409-15-9, name is 2-(2-Methoxyphenoxy)-1-(4-methoxyphenyl)propane-1,3-diol. This compound has unique chemical properties. The synthetic route is as follows.

1 part by weight of the compound2- (2-methoxyphenoxy) -1- (4-methoxyphenyl) -1-hydroxy-3-propanol and 1.8 parts by weightAl (NO3) 3 was added to 30 parts by weight of methanol,Set the microwave reactor power of 50W,Microwave frequency of 2450MHz, microwave-assisted heating at 80 for 40min.After completion of the reaction, the reaction was quenched with cold water immediately,The reaction solution was extracted with ethyl acetate,Take organic phase spin dry,Followed by further separation and purification by silica gel column chromatography,The mobile phase of ethyl acetate and n-hexane volume ratio of 1: 1, evaporated to dry the solvent that methylation products.

According to the analysis of related databases, 92409-15-9, the application of this compound in the production field has become more and more popular.

Reference:
Patent; South China University of Technology; Qiu, Xueqing; Ouyang, Xinping; Zhu, Guodian; Chen, Cheng; Jin, Dongxue; Zhao, Ying; (10 pag.)CN106117021; (2016); A;,
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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. 1875-89-4, name is 2-(m-Tolyl)ethanol, the common compound, a new synthetic route is introduced below. name: 2-(m-Tolyl)ethanol

Part A. Preparation of 3-methylphenethyl bromide. To a solution of 3-methylphenethyl alcohol (5.0 g, 36.7 mmol) in methylene chloride at 0° C. was added triphenylphosphine (10.6 g, 40.4 mmol) and carbon tetrabromide (13.4 g, 40.4 mmol). The mixture was allowed to stir with warming to 25° C. for 16 h. The solvent was removed in vacuo and the residue was taken up in ether and filtered through a pad of silica gel. The solvent was removed in vacuo to afford 7.0 g (95percent) of the title bromide.

The synthetic route of 1875-89-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; DuPont Pharmaceuticals Company; US6060462; (2000); A;,
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