Month: June 2021

Reference of 6943-97-1,Some common heterocyclic compound, 6943-97-1, name is 1-(3-Bromopropyl)-3-methoxybenzene, molecular formula is C10H13BrO, 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 flask containing solution of Mg turnings (271 mg, 11.31 mmol) in THF (10 mL) and a few crystals of iodine under nitrogen was added a solution of compound 15 (2.42 g, 11.31 mmol) in THF (15 mL) drop wise and reflux for 3 hrs. After 3 hrs the majority of the Mg had dissolved and a clear grayish colored solution had formed. The solution was cooled to 0 C and a solution of compound 16 (1.5 g, 7.07 mmol) in THF was added drop wise. The mixture was allowed to warm slowly to rt and reaction was monitored by tlc. Once the starting material is consumed the reaction mixture was quenched by saturated aqueous NH4Cl solution (30 mL). The reaction mixture was extracted with EtOAc (20 mL x 3) and layer was separated and washed with brine and dried over MgSO4. Removal of solvent and drying under vacuum provided the crude product that was separated by flash chromatography.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1-(3-Bromopropyl)-3-methoxybenzene, its application will become more common.

Reference:
Article; Asim, Muhammad; Klonowska, Daria; Choueiri, Christine; Korobkov, Ilia; Carlson, Kathryn E.; Katzenellenbogen, John A.; Durst, Tony; Bioorganic and Medicinal Chemistry Letters; vol. 22; 11; (2012); p. 3713 – 3717;,
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Electric Literature of 454-90-0, The chemical industry reduces the impact on the environment during synthesis 454-90-0, name is 3-(Trifluoromethyl)anisole, I believe this compound will play a more active role in future production and life.

A flame-dried 100 mL Schlenk tube was charged with bis(pinacolato)diboron (350 mg, 1.38 mmol), [Ir(COD)Cl]z (12 mg, 0.018 mmol), sodium methoxide (5 mg, 0.09 mmol), and 4,4′-di-tert-butyl-2,2′-dipyridyl (8 mg, 0.03 mmol). The flask was evacuated, placed under argon, and 3-trifluoromethylanisole (2.5 mL) was added. The flask was restoppered and evacuated (full vacuum, 2 minutes). The flask was sealed under vacuum and maintained at 90 C. (oil bath) for 96 h. Thereafter, the contents were transferred to a round bottom flask with the aid of ethyl acetate and purified by Kugelrohr distillation. The product, a viscous oil, distills at 120 C. 10 p.m. Isolated yield 497 mg (1.65 mmol, 60%). 1H NMR (400 MHz, CDCl3) delta 7.62 (s, 1H); 7.43 (s, 1H); 7.18 (s, 1H); 3.82 (s, 1H); 1.32 (s, 1H).

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, 3-(Trifluoromethyl)anisole, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; The Regents of the University of California; Tanaka, Masahiro; Zhang, Chao; Shokat, Kevan M.; Burlingame, Alma L.; Hansen, Kirk; Bateman, Raynard L.; DiMagno, Stephen G.; (81 pag.)US2016/168151; (2016); A1;,
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Related Products of 1758-46-9,Some common heterocyclic compound, 1758-46-9, name is 2-Phenoxyethylamine, molecular formula is C8H11NO, 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.

c) (4-Methyl-3,4-dihydro-quinazolin-2-yl)-(2-phenoxy-ethyl)-amine hydroiodide 2-Phenoxyethylamine (26 mg, 0.19 mmol) was added to a solution of 4-methyl-2-methylsulfanyl-3,4-dihydro-quinazoline hydroiodide (50 mg, 0.16 mmol) in acetonitrile (1 ml), and the mixture was heated overnight (80° C.) in a screw-capped vial. The solvent was then evaporated and the mixture was suspended in diethyl ether. The title compound (52 mg, 62percent) was obtained from this mixture by filtration. MS: m/e=282.1 [M+H+]. 1H NMR (CDCl3): delta 1.40 (3H, d), 3.72 (2H, m), 4.14 (2H, m), 4.80 (2H, q), 6.94-7.07 (3H, m), 7.11-7.16 (2H, m), 7.26-7.34 (4H, m), 7.89 (1H, bs), 8.56 (1H, bs), 10.25 (1H, bs).

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

Reference:
Patent; Alanine, Alexander; Gobbi, Luca Claudio; Kolczewski, Sabine; Luebbers, Thomas; Peters, Jens-Uwe; Steward, Lucinda; US2006/252779; (2006); A1;,
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Synthetic Route of 17061-62-0, 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. 17061-62-0, name is Bis(4-methoxybenzyl)amine belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

[0407j N,N-bis(4-methoxybenzyl)methanesulfonamide, Example 13.0. To a solution of bis(4-methoxybenzyl)amine 12.01 (100 g, 0.389 mol, 1 eq) in DCM (1 L) was added TEA (71 mL, 0.506 mol, 1.3 eq) followed by dropwise addition of methanesulfonyl chloride (36 mL, 0.46 mol, 1.2 eq). (The internal temperature was kept between 5-10 C during the addition of the methane sulfonyl chloride). Once the addition was complete, the cooling bath was removed. After 1.5 h, TLC showed complete loss of starting material. Water (1 L) was added to the reaction. The layers were separated and the aqueous layer was extracted with DCM (2x 500 mL). The combined organic layers were washed with brine (2x 1 L), dried over Na2SO4, and concentrated in vacuo. The material thus obtained was absorbed onto a plug of silica gel and purified by chromatography (silica gel (60-120 mesh) eluting with a gradient of 10-80% EtOAc in hexanes) to provide 120 g (0.36 mol, 92%) of the title compound Example 13.0 as white solid. ?H-NMR(400 MHz, CDC13) 7.26 (dd, J= 2.12, 6.60 Hz, 4H), 6.91 (dd, J= 2.12, 6.62 Hz, 4H), 4.28 (s, 4H), 3.83 (s, 6H), 2.75 (s, 3H). GC-MS (ESI p05. ion) mlz: = 335 (M+H).

The synthetic route of Bis(4-methoxybenzyl)amine has been constantly updated, and we look forward to future research findings.

Reference:
Patent; AMGEN INC.; CHEN, Ning; CHEN, Xiaoqi; CHEN, Yinhong; CHENG, Alan C.; CONNORS, Richard V.; DEIGNAN, Jeffrey; DRANSFIELD, Paul John; DU, Xiaohui; FU, Zice; HEATH, Julie Anne; HORNE, Daniel B.; HOUZE, Jonathan; KALLER, Matthew R.; KHAKOO, Aarif Yusuf; KOPECKY, David John; LAI, Su-Jen; MA, Zhihua; MCGEE, Lawrence R.; MEDINA, Julio C.; MIHALIC, Jeffrey T.; NISHIMURA, Nobuko; OLSON, Steven H.; PATTAROPONG, Vatee; SWAMINATH, Gayathri; WANG, Xiaodong; YANG, Kevin; YEH, Wen-Chen; DEBENEDETTO, Mikkel V.; FARRELL, Robert P.; HEDLEY, Simon J.; JUDD, Ted C.; KAYSER, Frank; (1266 pag.)WO2016/187308; (2016); A1;,
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Synthetic Route of 24332-20-5, 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 24332-20-5 as follows.

To a solution of 1,1,2-trimethoxy-ethane (25.0 g, 208.07 mmol) in methanol (125 mL) was added NH2OH.HCl (14.45 g, 208.07 mmol) at 0 C. The mixture was stirred for 16 h at room temperature. The mixture was cooled to 10 C. and aqueous NaOH solution (8.32 g, 208 mmol in 65 mL water) was added. The mixture was then stirred for 4 h at room temperature. The mixture was concentrated in vacuo and the remanence extracted with EtOAc (2×100 mL). The combined organic layers were dried over Na2SO4 and evaporated to dryness to give the crude oxime as a pale yellow liquid (12.0 g, 62%).

According to the analysis of related databases, 24332-20-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; H. Lundbeck A/S; US2012/252853; (2012); A1;,
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Synthetic Route of 768-70-7, 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. 768-70-7, name is 3-Ethynylanisole belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

General procedure: To a mixture of alpha-azidoamide 16aa (34 mg, 0.20 mmol) and phenylacetylene (9a; 24 L,0.20 mmol) in t-BuOH/H2O (2 mL, 1:1) were added 0.5 M CuSO4 (0.020 mL, 0.010 mmol) and 1.0 M sodium ascorbate (0.020 mL, 0.020 mmol). The reaction mixture was stirred at room temperature for 1 day, and then the resulting reaction mixture was filtered. The separated solid was washed with H2O and hexanes, and triturated with hexane/EtOAc (10:1) to give the 1-morpholino-2-(4-phenyl-1H-1,2,3-triazol-1-yl)ethanone (2aaa; 52 mg, 96%) as a white solid

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

Reference:
Article; Lee, Doohyun; Kim, Daehun; Lee, Seungyeon; Kim, Taegeum; Kim, Joobin; Kim, Sohee; Liu, Kwang-Hyeon; Lee, Sangkyu; Bae, Jong-Sup; Song, Kyung-Sik; Cho, Chang-Woo; Son, Youn Kyung; Baek, Dong Jae; Lee, Taeho; Molecules; vol. 20; 11; (2015); p. 19984 – 20013;,
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Application of 10541-78-3, The chemical industry reduces the impact on the environment during synthesis 10541-78-3, name is 2-Methoxy-N-methylaniline, I believe this compound will play a more active role in future production and life.

EXAMPLE 3 STR52 (Process (a)) 5.69 g (0.02 mol) of 2-chlorosulphonylaminocarbonyl-4-ethyl-5-methoxy-2,4-dihydro-3H-1,2,4-triazol-3-one are introduced into 150 ml of methylene chloride, and a solution of 2.74 g (0.02 mol) of 2-methoxy-N-methylaniline and 2.02 g (0.02 mol) of triethylamine in 20 ml of methylene chloride is added to this mixture at 20 C. The reaction mixture is stirred for 60 minutes at 20 C. It is then washed three times using 150 ml of water in each case, dried using sodium sulphate and filtered. The filtrate is concentrated under a water pump vacuum and the residue is recrystallized from isopropanol. 3.2 g (40% of theory) of 2-(2-methoxy-N-methyl-phenylamino)-sulphonylaminocarbonyl-4-ethyl-5-methoxy-2,4-dihydro-3H-1,2,4-triazol-3-one of melting point 134 C. are obtained.

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-Methoxy-N-methylaniline, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Bayer Aktiengesellschaft; US5654438; (1997); A;,
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Related Products of 20469-65-2,Some common heterocyclic compound, 20469-65-2, name is 1-Bromo-3,5-dimethoxybenzene, molecular formula is C8H9BrO2, 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 24 Synthesis of (1R,10R,11S,16S)-1,11,15,15-tetramethyl-3,5-bis(propan-2-yloxy)-8-oxatetracyclo[8.8.0.02,7.011,16]octadeca-2,4,6-triene To a solution of (35) (15.0 g, 69.0 mmol) in CH2Cl2 (40 mL), cooled to 0 C., a 1 M BBr3 solution in CH2Cl2 (140 mL, 140 mmol) was added dropwise. The ice bath was removed and the reaction was stirred at room temperature for 18 h. The reaction was quenched with MeOH and concentrated. The residue was dissolved in EtOAc (500 mL) and washed with water (300 mL). The organic layer was separated, dried (Na2SO4) and concentrated to give 5-bromobenzene-1,3-diol (45) (13.03 g, >99%) as an orange oil.

The synthetic route of 20469-65-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Aquinox Pharmaceuticals Inc.; US2011/136802; (2011); A1;,
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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. 41365-75-7, name is 1-Amino-3,3-diethoxypropane, A new synthetic method of this compound is introduced below., Recommanded Product: 1-Amino-3,3-diethoxypropane

General procedure: 3.2. Reaction of Wang Resin 1 with Trichloroacetonitrile and Fmoc-amino Alcohol (Resin 2)Wang resin 1 (1 mmol/g loading, 1 g) was suspended in 10 mL of anhydrous DCM, then 1.5 mL oftrichloroacetonitrile was added, and the resin was left in a freezer for 30 min. Next, a solution of 100 Lof DBU in 2 mL of anhydrous DCM was added, and the slurry was shaken for 1 h. The resin waswashed with anhydrous DCM (3) and anhydrous THF (3). The solution of Fmoc-amino alcohol(3 mmol) in 10 mL of anhydrous THF was added to the resin, followed by the dropwise addition of63 L of a solution of BF3Et2O, and the slurry was shaken for 30 min. Resin 2 was washed THF (3),MeOH (3), and DCM (5). A sample of the resin was washed with MeOH (3) and dried, and10 mg was cleaved with 50% TFA for 30 min, and the product quantified (Fmoc absorbance at 300 nm).Typical loading was between 0.35-0.50 mmol/g.3.3. Acylation with a-Bromocarboxylic Acids (Resins 3 And 13)Resin 2 (1 g) was washed with DCM and DMF, Fmoc was deprotected with 50% piperidine inDMF for 15 min, and the resin was washed with DMF (3) and DCM (5). Reaction of the resinwith a solution of -bromocarboxylic acid (5 mmol) in 10 mL of DCM was carried out in a syringewith a frit, and DIC (2.5 mmol, 386 L) was added. After 5 min, DIU was filtered, and the solutionwas transferred to the syringe with resin 1 and shaken for 1 h. When bromoacetic acid was used,DIEA (2.5 mmol, 436 L) was also added. Then, the resin was washed with DCM (3)._ 3.4. Reaction with Amino-aldehyde Dialkyl Acetal and N-Derivatization (Resin 4)Resin 3 (1 g) was washed with DMF (3), a solution of amino-aldehyde dialkyl acetal (10 mmol)and DIEA (10 mmol, 1.74 mL) in 10 mL of DMF was added, and the slurry was shaken for 2 h.An analytical sample was taken for analysis, reacted with 0.5 M Fmoc-OSu in DCM for 1 h and cleavedwith 50% TFA for 30 min.Resin from the previous step was split into four 250 mg portions, which were washedwith reaction solvent: DCM for sulfonamides (Ns-Cl, Tos-Cl) (1 mmol) and DMSO for 4-fluoro-3-nitrobenzotrifluoride (1 mmol). Then, 3 mL of the reaction solvent and DIEA (1.8 mmol, 174 L) wasadded, and the slurry was shaken for 2 h (in the case of sulfonamides) or overnight (in the case of4-trifluoromethyl-2-nitroaryl). Resin 4 was washed with the reaction solvent (3) and then DCM (3).A sample for analysis was reacted with 0.5 M Fmoc-OSu in DCM for 1 h and cleaved with 50% TFA for30 min.

The synthetic route of 41365-75-7 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Gimenez-Navarro, Vanesa; Krch?ak, Viktor; Molecules; vol. 23; 5; (2018);,
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Electric Literature of 168268-00-6, A common heterocyclic compound, 168268-00-6, name is 4-(Benzyloxy)-3-fluoroaniline, molecular formula is C13H12FNO, 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.

To a stirred mixture of 4-benzyloxy-3-fluoro-phenylamine (155.3 mmol, 33.7 g), 1- (4-FLUORO-PHENYLCARBAMOYL)-CYCLOPROPANECARBOXYLIC acid (170.8 mmol, 38.13 g) and anhydrous dichloromethane (600 ml) was added EDCI (233.9 mmol, 44.7 g) in portions. After stirring at RT for 1 hr, the reaction mixture was diluted with saturated sodium bicarbonate (400 ml) and stirred for 30 minutes. The precipitate was filtered and air dried to give the 1ST CROP of product. The biphasic filtrate was separated, and the organic phase was washed with brine (300 ml), dried over sodium sulfate, and concentrated. The residue was taken up in DCM (100 ml), stirred for 15 minutes, and filtered to give a 2ND crop of product. The combined yield of cyclopropane-1, 1- dicarboxylic acid (4-benzyloxy-3-fluoro-phenyl) -amide (4-fluoro-phenyl) -amide was 64.5 g (98%).

The synthetic route of 168268-00-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; EXELIXIS, INC.; WO2005/30140; (2005); A2;,
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