Month: July 2021

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. 126-38-5, name is 1-Bromo-2,2-dimethoxypropane, This compound has unique chemical properties. The synthetic route is as follows., Application In Synthesis of 1-Bromo-2,2-dimethoxypropane

Pentafluorophenoxyacetone, 39 Pentafluorophenol (1 g, 5.5 mmol), 1-bromo-2,2-dimethoxypropane (1 g, 5.5 mmol) and tetrabutylammoniun hydrogen sulfate (1.86 g, 5.5 mmol) phase transfer catalyst were dissolved in CH2 Cl2 (30 ml). KOH (2.8 g, 50 mmol) dissolved in H2 O (30 ml) was added. The reaction mixture was stirred at room temperature for two days. The organic layer was washed with 10% HCl (during this procedure the acetal was hydrolyzed to the product ketone), 10% NaHCO3 and H2 O. The product was separated from unreacted starting material by flash chromatography on silica gel (ethyl acetate/hexane 25/75), yielding 0.16 g. (12%) of a colorless liquid. 1 H NMR (CDCl3): delta2.32 (s, 3H, methyl group) 4.78 (s, 2H, methylene group).

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 126-38-5.

Reference:
Patent; Northeastern University; US5360819; (1994); A;,
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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. 93919-56-3, name is (4-(Trifluoromethoxy)phenyl)methanamine, A new synthetic method of this compound is introduced below., HPLC of Formula: C8H8F3NO

Step 4; 5-(2-phenyl-6-(4-(trifluoromethoxy)benzylcarbamoyl)qumolin-3-yl)pentanoic acid trifl oroacetate; To a solution of 1C (51 mg, 0.126 mmol) in DCM (5 mL) was added HATU (72 mg, 0.189 mmol) followed by DIPEA (81.3 mg, 0.629 mmol) and 4- (trifluoromethoxy)benylamine (38 uL, 0.25 mmol). The reaction mixture stirred at RT for 1 h. The reaction mixture was treated with TF A (3 mL), stirred at RT for 2 h and then concentrated to dryness under reduced pressure. Chromatography (5-100% EtOAc/hexanes) provided 1 (74 mg; Yield – 92%, LCMS (M+H) = 523).

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.

Reference:
Patent; MERCK SHARP & DOHME CORP.; SCHERING CORPORATION; BOYCE, Christopher, W.; FEVRIER, Salem; MCCORMICK, Kevin, D.; PALANI, Anandan; ASLANIAN, Robert, G.; SILIPHAIVANH, Phieng; METHOT, Joey, L.; BROWN, William Colby; VACCARO, Henry; WO2012/87872; (2012); A1;,
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Reference of 5397-31-9, A common heterocyclic compound, 5397-31-9, name is 3-((2-Ethylhexyl)oxy)propan-1-amine, molecular formula is C11H25NO, 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 1 Red Complex from Reactive Red 120, 3-(2-Ethylhexyloxyl)Propylamine and Aliquat 336 (0102) 14.7 gram of Reactive Red 120 (50% dye content), 2.81 gram of 3-(2-ethylhexyloxy)-propyl amine, 0.84 gram of sodium bicarbonate and 30 mL of water were charged into a reactor equipped with agitator, temperature control and condenser. The mixture was heated to 80 C. for several hours until the starting material Reactive Red 120 was gone as monitored by TLC. Then 12.1 gram of Aliquat 336 was added slowly and stirred at 80 C. for one hour. The reaction mixture was cooled to room temperature and dark red solid was precipitated. The solid was filtered and washed with water to remove salts. 24.1 gram of red solid with color value of 12.8 was obtained.

The synthetic route of 5397-31-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Milliken & Company; Hong, Xiaoyong Michael; Xie, Peter; Sun, Brian; Mason, Mary E.; US2015/299468; (2015); A1;,
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Electric Literature of 22236-08-4, A common heterocyclic compound, 22236-08-4, name is 3-(Difluoromethoxy)aniline, molecular formula is C7H7F2NO, 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: A solution of cyanic bromide [Caution, highly toxic] (2 equiv) in diethyl ether (10 mL) was added dropwise to a solution of the appropriately substituted aniline (1 equiv) in diethyl ether (10 mL) at 0 C. After complete addition the mixture was warmed to ambient temperature and stirred 1-20 h, which was followed by TLC. Solids were filtrated and washed with ether. The filtrate was washed with 1 M HCl (25 mL) followed by brine (25 mL). The organic layer was collected, dried over anhydrous MgSO4, filtrated and evaporated to dryness under reduced pressure. 5.1.32 N-(3-(Difluoromethoxy)phenyl)cyanamide (24h) The reaction of 3-(difluoromethoxy)aniline (23h) (1.60 g, 10.0 mmol) according to procedure A yielded, after purification over silica with ethyl acetate/petroleum ether (60-80) (25/75, v/v), the title compound as a light brown oil which solidified upon standing (683 mg, 3.71 mmol, 37%); Rf 0.24 (ethyl acetate/petroleum ether (60-80), 25/75, v/v). 1H NMR (CDCl3) delta 7.31-7.22 (m, 2H, HAryl), 6.87-6.76 (m, 2H, HAryl), 6.77 (s, 1H, NH), 6.48 (t, JHF = 73.5 Hz, 1H, CHF2). 13C NMR (CDCl3) delta 152.30 (Ar-O), 138.96 (Ar-N), 131.18 (Ar), 117.84 (t, CHF2, JCF = 260.72 Hz), 114.37 (Ar), 112.48 (Ar), 111.13 (NCN), 107.24 (Ar).

The synthetic route of 22236-08-4 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Klein, Pieter J.; Christiaans, Johannes A.M.; Metaxas, Athanasios; Schuit, Robert C.; Lammertsma, Adriaan A.; Van Berckel, Bart N.M.; Windhorst, Albert D.; Bioorganic and Medicinal Chemistry; vol. 23; 5; (2015); p. 1189 – 1206;,
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Reference of 103-50-4,Some common heterocyclic compound, 103-50-4, name is Benzyl ether, molecular formula is C14H14O, 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.

At 100 and at a pressure of 1.5MPa, ozone (30% by volume, the remainder being an equal volume of helium and oxygen) as the oxidant, the benzyl ether, the ozone and the solvent is acetonitrile according 1:2:60 The molar ratio of reaction.Results two hours the reaction is as follows: benzyl ether conversion was 43%; 51% selectivity to benzoic acid. This example illustrates the process and results in a reaction solvent is acetone time.The reaction conditions according to Example 11 is reacted, except that the use of acetone instead of acetonitrile as solvent.Results two hours the reaction is as follows: benzyl ether conversion was 58%; 56% selectivity to benzoic acid. This example illustrates the presence of a catalyst in the reaction process and results.In HTS catalyst, the molar ratio of the catalyst with the benzyl ether 1:10, ozone LHSV of 1000h-1, the other reaction conditions as in Example 12.Results two hours the reaction is as follows: benzyl ether conversions of 73%; 64% selectivity to benzoic acid.

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

Reference:
Patent; China Petroleum & Chemical Corporation; SINOPEC Research Institute of Petroleum Processing (RIPP); Zhu, bin; Shi, Chunfeng; Lin, Min; (8 pag.)CN103288631; (2016); B;,
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Electric Literature of 82830-49-7, 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. 82830-49-7, name is 2-Fluoro-1,4-dimethoxybenzene belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

A 10 mL oven-dried Schlenk tube was charged with magnesium (57.6 mg, 2.4 mmol) and anhydrous THF (1.5 mL), 5 drops of diisobutylaluminium hydride (DIBAL) was added and stirred for 5 min to activate magnesium. 2-bromo-1,3,5-triisopropylbenzene (566 mg, 2 mmol) was added potion-by-potion with vigorous stirring. The tube was capped with a rubber septum and was heated to 70 C. for 2 h (A). In another 10 mL oven-dried Schlenk tube was charged with 2-fluoro-1,4-dimethoxybenzene (156 mg, 1 mmol) and anhydrous THF (3.5 mL). The tube was cooled to -78 C. and 1.6 M n-BuLi solution in hexane (0.64 mL, 1 mmol) was added dropwise over 10 min under vigorous stirring. The mixture was stirred at -78 C. for 40 min (B). A was transferred into to B by syringe over 15 min at -78 C. An additional 1 mL of THF was used to rinse the reaction and was also transferred to B. The combined reaction mixture was stirred at -78 C. for another 1 h and then slowly warmed to room temperature and vigorously stirred for overnight. At this time, the mixture was cooled to 0 C. using ice bath, and iodine (762 mg, 3 mmol) in 4 mL anhydrous THF was added drop-wise over 5 min, then the reaction mixture was stirred for 30 min, and then warmed to stir at room temperature for 2 h. Then, the mixture was quenched with saturated Na2S2O3 (aq.) solution until the red color of bromine disappeared. The aqueous phase was extracted with Et2O (10 mL×3) and the combined organic phases were dried over anhydrous MgSO4. After concentration, the crude product was purified by silica gel chromatography (EtOAc/petroleum ether=1/20) followed by crystallization in methanol to get a white solid (162 mg, 30%), labeled as 25MeOTIP-I. 1H NMR (600 MHz, Chloroform-d) delta 7.39-7.29 (m, 4H), 7.28-7.24 (m, 1H), 7.21 (s, 1H), 6.90 (d, J=8.9 Hz, 1H), 6.82 (d, J=8.9 Hz, 1H), 3.91 (s, 3H), 3.71 (s, 3H), 2.66 (p, J=7.2 Hz, 1H), 2.55-2.45 (m, 1H), 2.34 (p, J=6.8 Hz, 1H), 1.23 (d, J=6.9 Hz, 3H), 1.11 (dd, J=12.6, 6.9 Hz, 6H), 1.04 (d, J=6.8 Hz, 3H), 0.81 (d, J=7.2 Hz, 3H), 0.72 (d, J=7.2 Hz, 3H) ppm. 13C NMR (151 MHz, Chloroform-d) delta 152.42 (d, J=24.3 Hz), 147.34, 145.33, 141.78, 137.81, 137.38, 137.03, 131.88, 131.03, 126.95, 126.24, 119.68, 109.92, 109.16, 56.81, 55.32, 32.61, 30.91, 29.66, 24.68 (d, J=2.3 Hz), 24.06, 23.75, 22.91 (d, J=21.4 Hz) ppm.

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-1,4-dimethoxybenzene, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Agency for Science, Technology and Research; Johannes, Charles W.; Robins, Edward G.; Jong, Howard; Lim, Yee Hwee; Chia, Saei Weng; Yang, Yong; Podichetty, Anil; (84 pag.)US2016/207034; (2016); A1;,
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Synthetic Route of 1535-73-5, 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. 1535-73-5, name is 3-Trifluoromethoxyaniline belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

A solution of NBS (20.1 g, 111.9 mmol) in DMF (40 mL) was added drop wise to a solution of 3-trifluoromethylaniline (20.0 g, 112.9 mmol) in DMF (80 mL) at room temperature over 40 minutes. The reaction mixture was stirred overnight.After 12 h, the reaction mixture was poured into water and extracted with EtOAc and the organic layer was dried over anhydrous Na2SO4. Concentration in vacuo gave 26 g of Preparation 67A. [00514] MS (ES): m/z = 256.2 [M+lf .

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

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; WO2009/3077; (2008); A1;,
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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. 588-96-5, name is p-Bromophenetole, This compound has unique chemical properties. The synthetic route is as follows., SDS of cas: 588-96-5

Ethyl 1-(4-ethoxyphenyl)-1H-pyrazole-3-carboxylate (2) A 10 mL Schlenk tube was dried under vacuum, filled with nitrogen and consecutively charged with 19.4 mg (0.102 mmol, 0.2 eq) Cul, 332.3 mg (1.020 mmol, 2.0 eq) Cs2CO3, 100.0 mg (0.714 mmol, 1.4 eq) ethyl 1H-pyrazole-3-carboxylate (6), 102.4 mg (73.0 muL, 0.510 mmol, 1.0 eq) p-bromophenetol and 1 mL dry ACN. The light brown suspension was degassed by vaccum/N2 cycles and stirred first at 82 C. for 7 h and than after adding 0.5 mL dry DMF (solubility issue) at 120 C. for further 65 h. The GC-MS analysis showed full conversion. ACN and DMF were removed under high pressure and the brown residue was suspended in 10 mL EtOAc. After filtration of the brown suspension through a pad of silica and flushing with 150 mL EtOAc the colorless filtrate was concentrated under reduced pressure leading to 52.1 mg (39%) crude product as a green-brown oil. Final purification by column chromatography (CH/EtOAc 3:1, size: 15.5*2.0 cm, 20 g silica gel) yielded the pure title compound. yield: 10.2 mg (8%); orange solid; M.p.: 88-90 C.; Rf (CH/EtOAc 3:1): 0.40; 1H-NMR (300 MHz, DMSO-d6): delta (ppm)=8.51 (d, 4J=2.4 Hz, 1H, Ar-H), 7.78 (d, 3J=9.0 Hz, 2H, Ar-H), 7.07 (d, 3J=9.0 Hz, 2H, Ar-H), 6.97 (d, 4J=2.4 Hz, 1H, Ar-H), 4.31 (q, 3J=6.9 Hz, 2H, CH2), 4.08 (q, 3J=7.2 Hz, 2H, CH2), 1.37-1.29 (m, 6H, 2 CH3); 13C-NMR (75.5 MHz, DMSO-d6): delta (ppm)=161.4 (C=O), 157.6 (Cq), 143.6 (Cq), 132.5 (Cq), 129.5 (CHAr), 120.7 (2CHAr), 115.0 (2CHAr), 119.8 (CHAr), 63.4 (CH2), 60.3 (CH2), 14.5 (CH3), 14.1 (CH3); GC-MS (NM-50_S2): tR=7.722 min (m/z=260.1, 98.0% M+, BP).

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 588-96-5.

Reference:
Patent; Technische Universitaet Graz; Karl-Franzens-Universitaet Graz; Schweiger, Martina; Romauch, Matthias; Zimmermann, Robert; Mayer, Nicole; Breinbauer, Rolf; US9206115; (2015); B2;,
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Related Products of 93919-56-3, These common heterocyclic compound, 93919-56-3, name is (4-(Trifluoromethoxy)phenyl)methanamine, 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 solutionof the corresponding aldehyde (1.2 eq.; unless stated otherwise) in DMF (2 inL per 0.3 mmol of aldehyde; unless stated otherwise) was added the corresponding amine (2.5 eq.; unless stated otherwise) and the resulting solution was stirred at 25 C to form the corresponding inline. Then, the corresponding isocyano(tosyl)methyl)arene reagent (1 eq.; unless stated otherwise) and K2CO3 (1.5 eq.; unless stated otherwise*) were added and the reaction mixture was stirred at 25 C (unless stated otherwise). The reaction was stopped after the time indicated for each particular reaction. The reaction progress was monitored by TLC. (0083) A saturated aqueous solution of NH4CI (10 mL per 1 mmol of aldehyde) was added to the reaction mixture, which was then extracted with EtOAc (2 x 30 mL per 1 mmol of aldehyde). The combined organic extracts were washed with H2O (2 x 25 mL per 1 mmol of aldehyde), dried over MgSCC, filtered, and the solvent was evaporated in vacuo to provide the crude product. The residue obtained after the workup was purified using column chromatography or preparative TLC (unless stated otherwise). (0084) * note: in cases when the amine was used as HC1 salt, 4 eq. of K2CO3 were used

Statistics shows that (4-(Trifluoromethoxy)phenyl)methanamine is playing an increasingly important role. we look forward to future research findings about 93919-56-3.

Reference:
Patent; MASARYKOVA UNIVERZITA; BRYJA, Vitezslav; JANOVSKA, Pavlina; GREGOROVA, Michaela; NEMEC, Vaclav; KHIRSARIYA, Prashant; PARUCH, Kamil; (171 pag.)WO2019/185631; (2019); A1;,
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Reference of 5961-59-1, A common heterocyclic compound, 5961-59-1, name is 4-Methoxy-N-methylaniline, molecular formula is C8H11NO, 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.

A solution of 62 (tert-butoxycarbonyl)-l-phenylalanine (1, 8.75mmol, 2.3g) in 15mL 63 dichloromethane was added PyBop (10.9mmol, 5.7g) at 0C, and the mixture stirred for 0.5h. Subsequently, 64 DIEA (21.87mmol, 3.61mL) and 25 4-methoxy-N-methylaniline (7.29mmol, 1.0g) were added to the mixture and then stirred at room temperature for another 8-9h (monitored by TLC). The resulting mixture was evaporated under reduced pressure and the residue was initially washed by 1N HCl and extracted with ethyl acetate (3×20mL). Then, the combined organic layer was washed with saturated sodium bicarbonate (3×50mL), dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure to afford corresponding crude intermediate 65 2 as yellow oil with a yield of 94%. 1H NMR (400MHz, DMSO-d6) delta 7.21 (d, J=8.4Hz, 3H), 7.15 (d, J=7.1Hz, 2H), 7.02 (d, J=8.4Hz, 2H), 6.85-6.75 (m, 2H), 4.15 (q, J=5.4Hz, 1H), 3.80 (s, 3H), 3.12 (s, 3H), 2.81-2.54 (m, 2H), 1.30 (s, 9H). 13C NMR (100MHz, DMSO) delta 172.21, 158.98, 155.74, 138.53, 136.13, 129.28, 128.47, 126.70, 115.21, 78.33, 55.94, 53.53, 37.86, 37.10, 28.65. ESI-MS: m/z 385.4 (M+1)+, C22H28N2O4 (384.2)

The synthetic route of 5961-59-1 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Wu, Gaochan; Zalloum, Waleed A.; Meuser, Megan E.; Jing, Lanlan; Kang, Dongwei; Chen, Chin-Ho; Tian, Ye; Zhang, Fangfang; Cocklin, Simon; Lee, Kuo-Hsiung; Liu, Xinyong; Zhan, Peng; European Journal of Medicinal Chemistry; vol. 158; (2018); p. 478 – 492;,
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