Month: July 2021

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. 22483-09-6, name is 2,2-Dimethoxyethanamine belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Formula: C4H11NO2

(a) Ethyl N-(2,2-dimethoxyethyl)-carbamate 214 g (2 mol) of ethyl chloroformate are added dropwise to 214 g (2 mol) of aminoacetaldehyde dimethyl acetal in 1 l of toluene and 90 g of NaOH in 500 ml of water at 10 C. The mixture is stirred at room temperature for a further 2 hours and the aqueous phase is separated off, saturated with sodium chloride and extracted with toluene. The toluene solutions are dried over magnesium sulphate and concentrated and the residue is distilled. Yield: 338 g (95.4% of theory) Boiling point: 60 C./0.03 mbar

The synthetic route of 22483-09-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Bayer Aktiengesellschaft; US4990517; (1991); A;,
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Reference of 59557-91-4, These common heterocyclic compound, 59557-91-4, name is 4-Bromo-2-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.

At 5 C., a solution of bromine (9.8 mL, 192.5 mmol, 1.1 eq) in dichloromethane (120 mL) was added slowly to a dichloromethane solution (240 mL) of 4-bromo-2-methoxyaniline (35.35 g, 175 mmol) under vigorous stirring. The reaction mixture was kept at this temperature for 2 h. After the completion monitored by TLC, the reaction mixture was poured into ice water and extracted with ethyl acetate (3*200 mL). The organic layer was combined, washed with brine (3*50 mL) and dried over sodium sulfate. Then the reaction mixture was purified by flash column chromatography (ethyl acetate/hexanes (v/v)=5/95). The product (40.3 g, yield=82%) was obtained as a red liquid. 1H NMR (600 MHz, CDCl3) delta 7.20 (d, J=1.9 Hz, 1H), 6.84 (d, J=1.8 Hz, 1H), 4.21 (s, 2H), 3.86 (s, 3H). LRMS m/z 280.0 [M+H]+.

The synthetic route of 59557-91-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; The Regents of the University of Michigan; Cierpicki, Tomasz; Grembecka, Jolanta; Huang, Huang; Zari, Sergi; Cho, Hyo Je; Potopnyk, Mykhaylo; Dudkin, Sergeii; Chen, Wenbing; Adam, Yassir; Howard, Christina; Kim, EunGi; US2019/183865; (2019); A1;,
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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 6298-96-0 as follows. SDS of cas: 6298-96-0

To a 250 mL RBF was added (S)-1-(4-methoxyphenyl)ethanamine (6.39 g, 42.3 mmol), 1-(3- methylpyridin-2-yl)ethanone (6 g, 44.4 mmol), DCM (Volume: 106 ml) and STAB-H (17.92 g, 85 mmol) at rt and the reaction was stirred for 24h. The reaction was quenched by the addition of 1N NaOH until a pH of 8 was achieved. The phases were separated and the organic layer was treated with 1N NaOH until pH 11 was observed. The DCM layer was dried with MgSO4 filtered and concentrated to an oily residue. The residue was purified via combiflash to separate the diastereomers (~4:1 by crude NMR, 80g column 10-30% gradient over 40 min). 1H NMR (400 MHz, CDCl3): delta= 8.45 (d, J= 4.8 Hz, 1H), 7.34 (d, J= 7.6 Hz, 1H), 7.13 (d, J= 8.5 Hz, 2H), 7.04 (dd, J= 7.8, 4.6 Hz, 1H), 6.82 (d, J= 9.2 Hz, 2H), 3.79 (s, 3H), 3.74 (q, J= 6.0 Hz, 1H), 3.27 (q, J= 5.9 Hz, 1H), 1.24 (d, J= 6.3 Hz, 3H), 1.20 (d, J= 6.3 Hz, 3H); LC/MS 75% MeOH in H2O over 3 minutes, rt = 0.480 at 254 nM, MS (+) 271.2

According to the analysis of related databases, 6298-96-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; EMORY UNIVERSITY; LIOTTA, Dennis C.; JECS, Edgars; WILSON, Robert James; NGUYEN, Huy Hoang; KIM, Michelle Bora; WILSON, Lawrence; MILLER, Eric James; TAHIROVIC, Yesim Altas; TRUAX, Valarie; KAISER, Thomas; (311 pag.)WO2018/156595; (2018); 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., HPLC of Formula: C7H17NO2

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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Adding a certain compound to certain chemical reactions, such as: 89521-55-1, name is 3-(Benzyloxy)benzene-1,2-diamine, 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 89521-55-1, Recommanded Product: 89521-55-1

107C. 3:1 regio isomeric mixture of tert-butyl 4-(2-amino-3- (benzyloxy)phenylcarbamo vD- 1 -( 1 H-pyrazo Io [3 ,4-d1pyrimidin-4- yl)piperidin-4- ylcarbamate and tert-butyl 4-(2-amino-6-(benzyloxy)phenylcarbamoyl)-l-(lH- pyrazolor3,4-dlpyrimidin-4-yl)piperidin-4-ylcarbamate.N,N-Diisopropylethylamine (6.58 mL, 37.75 mmol) was added in one portion to a stirred suspension o f 4-(tert-butoxycarbonylamino)- 1 -( 1 H-pyrazo Io [3 ,4-d]pyrimidin-4- yl)piperidine-4-carboxylic acid (9.12 g, 25.17 mmol) and O-(7-Azabenzotriazol-l-yl)- N,N,N’,N’-tetramethyluronium hexafluorophosphate (10.53 g, 27.68 mmol) in NMP (60 mL). The mixture was warmed to 5O0C for 15 minutes under nitrogen and cooled to 2O0C. 3-(benzyloxy)benzene-l,2-diamine (5.39 g, 25.17 mmol) was added in one portion and the resulting solution was stirred at 20 0C for 70 hours. The reaction mixture was diluted with EtOAc (200 mL), and washed sequentially with water (3 x 100 mL) and saturated brine (100 mL). The organic layer was dried over MgSO4, filtered and evaporated to afford crude product which was purified by flash silica chromatography, elution gradient 1 to 10% MeOH in DCM. Fractions containing product were were evaporated to dryness to afford a pink foam which was shown to be an 82% pure 3:1 regio isomeric mixture of tert- butyl 4-(2-amino-3 -(benzyloxy)phenylcarbamoyl)- 1 -( 1 H-pyrazo Io [3 ,4-d]pyrimidin-4- yl)piperidin-4-ylcarbamate and tert-butyl 4-(2-amino-6-(benzyloxy)phenylcarbamoyl)-l- (lH-pyrazolo[3,4-d]pyrimidin-4-yl)piperidin-4-ylcarbamate. (8.1g, 58% of 82% pure), m/z (ESI+) (M+H)+ = 559; HPLC tR = 2.21 min (28%), 2.41 min (72%); IH NMR (399.9 MHz, DMSO-d6) delta 1.44 (9H, d), 1.96 (0.5H, m), 2.13 (1.5H, s), 3.72 (2H, d), 4.31 (IH, m), 4.46 (IH, m), 4.94 (0.5H, s), 5.13 (1.5H, s), 6.28 (0.25H, d), 6.32 (0.25H, d), 6.51 (0.75H, t), 6.62 (0.75H, s), 6.81 (0.75H, d), 6.90 (0.25H, m), 7.22 – 7.43 (6H, m), 7.50 (1.5H, d), 8.15 (0.25H, s), 8.25 (IH, m), 8.32 (0.75H, s), 8.61 (0.25H, s), 9.10 (0.75H, s), 13.51 (IH, s)

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-(Benzyloxy)benzene-1,2-diamine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ASTEX THERAPEUTICS LIMITED; THE INSTITUTE OF CANCER RESEARCH:ROYAL CANCER HOSPITAL; CANCER RESEARCH TECHNOLOGY LIMITED; ASTRAZENECA AB; WO2008/75109; (2008); 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. 1535-75-7, name is 2-(Trifluoromethoxy)aniline, A new synthetic method of this compound is introduced below., COA of Formula: C7H6F3NO

General procedure: 1-Aryl-4-nitro-1H-imidazoles were prepared following the general procedure we have developed in our laboratory [23] with some slight modifications. Equimolar amount of aniline derivative was treated with 1,4-dinitro-1H-imidazole in aqueous methanol at ambient temperature in the dark for several hours until complete disappearance of 1,4-dinitro-1H-imidazole monitored by TLC. In some cases, the mixture was heated under reflux to complete the reaction. On cooling, the desired crude 1-aryl-4-nitro-1H-imidazoles separated from the mixture by precipitation. After filtration and recrystallization the pure product was obtained. Yields, solvents used for recrystallization and specific data are given below in the respective sections. Further details are available on request.

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:
Article; Trunz, Bernadette Bourdin; Jdrysiak, Rafa?; Tweats, David; Brun, Reto; Kaiser, Marcel; Suwi?ski, Jerzy; Torreele, Els; European Journal of Medicinal Chemistry; vol. 46; 5; (2011); p. 1524 – 1535;,
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Application of 29578-83-4,Some common heterocyclic compound, 29578-83-4, name is 1-Bromo-3-methoxy-5-methylbenzene, molecular formula is C8H9BrO, 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 Synthesis of (1R,10R,11S,16S)-5-methoxy-1,3,11,15,15-pentamethyl-8-oxatetracyclo[8.8.0.02,7.011,16]octadeca-2,4,6-triene Cu(I)I (0.05 g, 0.25 mmol) and NaI (1.49 g, 10 mmol) were added to an oven dried sealed tube and the tube sealed with a rubber septum and flushed with a stream of nitrogen for 15 min. Anhydrous dioxane (5 mL), N,N’-dimethyl ethylenediamine (0.055 mL, 0.50 mmol) and 1-bromo-3-methoxy-5-methylbenzene (1) (1.0 g, 5.0 mmol) were added via a syringe with vigorous stirring under a stream of nitrogen at room temperature. The rubber septum was replaced with the Teflon cap and the sealed tube was heated at 110 C. in an oil bath for 18 h. The reaction was allowed to cool to room temperature and then quenched with a saturated aqueous solution of ammonium chloride. The reaction mixture was extracted with CH2Cl2. The organic layer was washed with water, and then concentrated to dryness to give 1-iodo-3-methoxy-5-methylbenzene (2) (1.05 g, 87% yield) as a pale yellow oil.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1-Bromo-3-methoxy-5-methylbenzene, its application will become more common.

Reference:
Patent; Aquinox Pharmaceuticals Inc.; US2011/136802; (2011); A1;,
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Reference of 261762-35-0, 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. 261762-35-0, name is 5-Bromo-1,2-difluoro-3-methoxybenzene belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

To a solution of 2-benzyloxy-5,6,7,8-tetrahydro-1,6-naphthyridine (500 mg, 2.4 mmol) and 5-bromo-1,2-difluoro-3-methoxy-benzene (696 mg, 3.1 mmol) in dioxane (10 mL) was added tBuONa (345.6 mg, 3.6 mmol), Pd2(dba)3 (44 mg, 0.05 mmol) and RuPhos (34 mg, 0.07 mmol)under N2. After being heated with stuffing at 100 C for 12 hrs, the resulting mixture was filtered and concentrated in vacuo. The residue was purified to give 2-benzyloxy-6-(3,4-difluoro-5- methoxy-phenyl)-7,8-dihydro-5H-1,6-naphthyridine (500 mg), which was used in the next step without further purification.

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, 5-Bromo-1,2-difluoro-3-methoxybenzene, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; CHENG, Zhanling; WANG, Min; YANG, Song; (208 pag.)WO2016/107832; (2016); A1;,
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Application of 33311-29-4,Some common heterocyclic compound, 33311-29-4, name is 4-(2-Methoxyethoxy)aniline, molecular formula is C9H13NO2, 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.

[00511] To a solution of tert-butyl 3-(2-chloro-5-nitropyrimidin-4-ylamino )phenylcarbamate(1) (430 mg, 1.37 mmol) in THF (10 mL) was added DIEA (530 mg, 4.1 mmol) and 4-(2-methoxyethoxy)aniline (39) (274 mg, 1.64 mmol) at r.t. under N2 atmosphere. The resultingmixture was stirred at r.t. overnight. The solvent was removed and the residue was purified byflash column chromatography (silica gel, 0 to 5% ethyl acetate in PE/DCM (1/1), with 0.5%TEA) to provide tert-butyl 3-(2-( 4-(2-methoxyethoxy)phenylamino )-5-nitropyrimidin-4-ylamino)phenylcarbamate (2) (559 mg, 96%) as a yellow solid. LC-MS (ESI) m/z (M+1) 497.1.

The synthetic route of 33311-29-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; PHARMACYCLICS, INC.; CHEN, Wei; YAN, Shunqi; LOURY, David, J.; FRYE, Leah, Lynn; GREENWOOD, Jeremy, Robert; SHELLEY, Mee, Yoo; WANG, Longcheng; WO2014/130693; (2014); A1;,
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Reference of 589-10-6, 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. 589-10-6, name is (2-Bromoethoxy)benzene belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Example 110 N’-[1-imadazol-1-yl-1-[1-(2-phenoxyethyl)imidazol-2-yl]methylidene]-N,N-dimethylhydrazine (compound Nos. 111, 112) To a solution of ethyl imidazole-2-carboxylate (0.505 g, 3.60 mmol) in N,N-dimethylformamide (6 ml) were added beta-bromophenetole (0.804 g, 4.00 mmol) and potassium carbonate (0.598 g, 4.32 mmol), and the mixture was stirred at 80C for 1 hr. Ethyl acetate was added to the reaction mixture, the mixture was washed with water, and the organic layer was dried over sodium sulfate. The solvent was evaporated under reduced pressure, and the obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate) to give ethyl 1-(2-phenoxyethyl)imidazole-2-carboxylate (0.869 g, 3.34 mmol, yield 93%).

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-Bromoethoxy)benzene, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; KAKEN PHARMACEUTICAL CO., LTD.; EP2168951; (2010); A1;,
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