Month: November 2020

It is a common heterocyclic compound, the benzodioxans compound, 2,3-Dihydro-1,4-benzodioxine-6-carboxylic acid, cas is 4442-54-0 its synthesis route is as follows.,4442-54-0

General procedure: 2,3-Dihydrobenzo[b][1,4]dioxin-6-carboxylic acid (or 2,3-dihydrobenzo[b][1,4]dioxin-2-carboxylic acid) (1 mmol) and 98percent H2SO4 (1 ml) in ethanol (20 mL) were refluxed at 80 ¡ãC for 5 h. While the reaction completed, 80percent hydrazine hydrate (2 mmol) was added and then the solution was refluxed at 80 ¡ãC for another 5 h. While the reaction completed, the ethanol was evaporated. The separated solid was filtered, washed with cold ethanol and dried to obtain white solid Bb.

With the complex challenges of chemical substances, we look forward to future research findings about 2,3-Dihydro-1,4-benzodioxine-6-carboxylic acid

Reference£º
Article; Yang, Yu-Shun; Li, Qing-Shan; Sun, Shuai; Zhang, Yan-Bin; Wang, Xiao-Liang; Zhang, Fei; Tang, Jian-Feng; Zhu, Hai-Liang; Bioorganic and Medicinal Chemistry; vol. 20; 20; (2012); p. 6048 – 6058;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

As a common heterocyclic compound, it belongs to benzodioxans compound, name is 1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone, and cas is 2879-20-1, its synthesis route is as follows.,2879-20-1

A solution of 1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)ethanone (XV) (1 eq) in THF was added slowly to a suspension of NaH (1.5 eq) in THF stirred under nitrogen at room temperature. The solution was further allowed to stir at room temperature until the evolution of gas was ceased. Ethyl picolinate (XIX) (1.1 eq) was added to the solution and refluxed overnight under nitrogen. The solution was cooled, poured into ice water and extracted with ethyl acetate. The organic layer was dried over MgSO4, filtered and concentrated under vacuum. The crude product was purified by column chromatography over silica gel to produce 1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-3-(pyridin-2-yl)propane-1,3-dione 15 as a yellow solid (71% yield), 1H NMR (CDCl3, 400 MHz): delta ppm 4.13-4.43 (m, 4H), 6.94 (d, J=8.31 Hz, 1H), 7.42 (m, 1H), 7.44 (m, 1H) 7.59 (m, 2H), 7.85 (m, 1H), 8.14 (d, J=7.81, 1H), 8.65 (m, 1H); ESIMS found C16H13NO4 m/z 284 (M+H).

With the complex challenges of chemical substances, we look forward to future research findings about 2879-20-1,belong benzodioxans compound

Reference£º
Patent; WINTHERIX, LLC; US2012/46320; (2012); A1;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

As a common heterocyclic compound, it belongs to quinuclidine compound,Quinuclidine-4-carboxylic acid hydrochloride,40117-63-3,Molecular formula: C8H14ClNO204,mainly used in chemical industry, its synthesis route is as follows.,31127-39-6

General procedure: A solutionof oxime 1a-k (23 mmol) in isopropyl alcohol (100 mL) was loaded into the autoclave with the fl uoroplastic bush, concentratedHCl (10.5 mL) was added, and a block of the regeneratedcatalyst was fi xed. Hydrogenation was conducted for 3-5 h at20 C and a hydrogen pressure of 10 atm, which was maintainedat this level during the reaction. The reaction course was monitoredby TLC. After the initial oxime disappeared completely,the reaction solution was poured out of the autoclave, the catalystblock was washed with methanol (3¡Á30 mL), and the combinedsolutions were fi ltered from mechanical impurities. The solventwas evaporated, and analytically pure aromatic benzylamines3a-k were obtained.When hydrogenation was conducted in methanol (100 mL),solvent removal was followed by drying residue using azeotropicdistillation with isopropyl alcohol (250 mL). For the hydrogenationof compound 1k, the reaction mixture was additionallypurifi ed by refl ux with active carbon for 1 h. The blockcatalyst was regenerated directly in the reactor at 400 C ina hydrogen fl ow and further used in the next hydrogenationprocedure.

With the complex challenges of chemical substances, we look forward to future research findings about 2,3-Dihydrobenzo[b][1,4]dioxine-6-carbaldehyde oxime,belong benzodioxans compound

Reference£º
Article; Ignatov; Varakutin; Solov?eva; Karmanova; Kozlov; Semenova; Semenov; Russian Chemical Bulletin; vol. 67; 8; (2018); p. 1394 – 1400; Izv. Akad. Nauk, Ser. Khim.; 8; (2018); p. 1394 – 1400,7;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

Name is Methyl 1,4-Benzodioxan-6-carboxylate, as a common heterocyclic compound, it belongs to benzodioxans compound, and cas is 20197-75-5, its synthesis route is as follows.,20197-75-5

To a solution of compound 2 (1 mmol) in ethanol (15 mL) wasadded hydrazine hydrate (10 mmol), and the mixture was heatedat reflux for 2 days. Excessive ethanol was distilled out and thecontents were allowed to cool. The crystals formed, collected by filtrationand washed several times with ethanol to obtain compound3. The completion of the reaction was monitored on TLC by usingmethanol and ethyl acetate (1:10) and observed in UV light.

With the complex challenges of chemical substances, we look forward to future research findings about Methyl 1,4-Benzodioxan-6-carboxylate

Reference£º
Article; Sun, Juan; Ren, Shen-Zhen; Lu, Xiao-Yuan; Li, Jing-Jing; Shen, Fa-Qian; Xu, Chen; Zhu, Hai-Liang; Bioorganic and Medicinal Chemistry; vol. 25; 9; (2017); p. 2593 – 2600;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone, cas is 2879-20-1, it is a common heterocyclic compound, the benzodioxans compound, its synthesis route is as follows.,2879-20-1

General procedure: A series of sixteen novel 1, 4-benzodioxane-based thiosemicarbazones(3a-p) was synthesized by reacting appropriatethiosemicarbazide (1a-p) (5 mmol) and 1, 4-benzodioxan-6-ylmethyl ketone (2) (5 mmol) in methanol (15 mL) using glacialacetic acid (1e2 drops) as catalyst. Reflux at 80 C for 6 h wascarried out and the product formation and the reaction completion were examined by thin layer chromatography. Upon completion,the reaction mixturewas allowed to cool at r.t and the solid productwas collected by suction filtration followed by washing with hotmethanol and then dried in vacuum. Finally, the target thiosemicarbazonesderivatives were recrystallized from chloroformmethanolmixture (1:1) in good to excellent yields. The X-raymeasurements were read by mounting a 3m single crystal on agreased MiTe Gen loop and was inspected through thediffractometer (Bruker D8 Venture APEX diffractometer) at 296 (2)K by means of graphite-monochromated MoeK a radiation(l 0.71073 A); diffractometer was complimented with an areadetector (Photon 100 CCD) along with a cooler (Oxford Cryostream).APEX-II software was used to collect Data [41] and SAINTwas operated for integration [42] The SADABS (multi-scanapproach) was used for correction in absorption [43]. and intrinsicphasing (SHELXT)was employed to the solve the structure [44]. Fullleast squares refinement of all detected reflections were used todetermine the final cell constants and assign positions of all atomsother than H to the consequential difference maps via refinementagainst F2. Whereas H atoms were assigned location and addedagainst F2 and were refined by riding model. SHELXL-97 wasimplemented to refine anisotropically [45]. The CCDC (CSD depositionnumbers 1874544) of the structure has been deposited. Thedetailed characterization of compounds 3a e 3p are given insupporting informations.

With the rapid development of chemical substances, we look forward to future research findings about 1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone

Reference£º
Article; Shehzad, Muhammad Tariq; Khan, Ajmal; Islam, Muhammad; Hameed, Abdul; Khiat, Mohammed; Halim, Sobia Ahsan; Anwar, Muhammad U.; Shah, Syed Raza; Hussain, Javid; Csuk, Rene; Khan, Samra; Al-Harrasi, Ahmed; Shafiq, Zahid; Journal of Molecular Structure; vol. 1209; (2020);,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

As a common heterocyclic compound, it belongs to benzodioxans compound, name is 1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone, and cas is 2879-20-1, its synthesis route is as follows.,2879-20-1

General procedure: To 1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)ethan-1-one(A) (1 mmol) alcohol solution (5 mL) was added substituted benzaldehyde(1 mmol). After dissolution, 50% NaOH (0.5 mL) was added. After confirming the completion of the reaction by thin layer chromatography, the sediment was filtered, washed with ethanol and dried to obtain chalcone

With the complex challenges of chemical substances, we look forward to future research findings about 2879-20-1,belong benzodioxans compound

Reference£º
Article; Yang, Yu-Shun; Yang, Bing; Zou, Yan; Li, Guigen; Zhu, Hai-Liang; Bioorganic and Medicinal Chemistry; vol. 24; 13; (2016); p. 3052 – 3061;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

As a common heterocyclic compound, it belongs to benzodioxans compound, name is 1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone, and cas is 2879-20-1, its synthesis route is as follows.,2879-20-1

A mixture of 1-(2,3-dihydro-1,4-benzodioxin-6-yl)ethanone (25.0 g, 140 mmol) and phenyltri-methylammonium tribromide (52.7 g, 140 mmol) in dichloromethane (300 ml) was stirred at RT overnight. The ammonium salts were filtered off, and the filter cake was washed with ethyl ace- tate. The filtrate was concentrated under reduced pressure, and the solid product thus obtained was used in the next step without further purification. Yield: 34.35 g (95% of theory). 1H-NMR (400 MHz, CDCIs): d [ppm] = 7.50-7.54 (m, 2H), 6.91-6.95 (m, 1H), 4.37 (s, 2H), 4.27-4.35 (m, 4H).

With the complex challenges of chemical substances, we look forward to future research findings about 2879-20-1,belong benzodioxans compound

Reference£º
Patent; BAYER AKTIENGESELLSCHAFT; BAYER PHARMA AKTIENGESELLSCHAFT; MUeLLER, Steffen; SCHOHE-LOOP, Rudolf; ORTEGA, HERNANDEZ, Nuria; SUeSSMEIER, Frank; JIMENEZ NUNEZ, Eloisa; BRUMBY, Thomas; LINDNER, Niels; GERDES, Christoph; POOK, Elisabeth; BUCHMUeLLER, Anja; GAUGAZ, Fabienne, Zdenka; LANG, Dieter; ZIMMERMANN, Stefanie; EHRMANN, Alexander, Helmut, Michael; GERISCH, Michael; LEHMANN, Lutz; TIMMERMANN, Andreas; SCHAeFER, Martina; SCHMIDT, Georg; SCHLEMMER, Karl-Heinz; FOLLMANN, Markus; KERSTEN, Elisabeth; WANG, Vivian; GAO, Xiang; WANG, Yafeng; (801 pag.)WO2019/219517; (2019); A1;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

4442-54-0, 2,3-Dihydro-1,4-benzodioxine-6-carboxylic acid is a benzodioxans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Compound 249, N-(4-iodo-3-nitrophenyl)-2,3-dihydrobenzo[b][1,4]dioxine-6-carboxamide[00337] Oxalyl chloride (0.37 ml_, 4.23 mmol) was added dropwise to a stirred solution of 1 ,4-benzodioxane-6-carboxylic acid (0.635 g, 3.52 mmol) and DMF (6.82 muL 0.088 mmol) in dry DCM (10 ml_). The reaction mixture was stirred for 30 minutes, then concentrated in vacuo, dissolved in DCM (10 mL) and concentrated in vacuo. The concentrate was dissolved in DCM (10 mL) and added drop wise to a stirred solution of pyridine (0.57 mL, 7.04 mmol) and 4-iodo-3-nitroaniline (0.93 g, 3.52 mmol) in DCM (10 mL). After stirring for 16 hours, the reaction mixture was concentrated in vacuo. The concentrate was suspended in MeOH (30 mL) and diluted with water (60 mL). The solid was filtered, washed with water and dried on the high vac to afford the desired product as a pale yellow solid (1 .310 g, 87percent). 1H-NMR (500 MHz, DMSO): delta 10.50 (s, 1 H), 8.49 (d, J = 2.4 Hz, 1 H), 8.07 (d, J = 8.6 Hz, 1 H), 7.80 (dd, J = 8.7, 2.5 Hz, 1 H), 7.62 – 7.43 (m, 2H), 7.01 (d, J = 8.4 Hz, 1 H), 4.49 – 4.18 (m, 4H). HRMS (ESI+): Found [M+H]+426.9789 C15H12IN2O5 requires 426.9785.

4442-54-0, As the paragraph descriping shows that 4442-54-0 is playing an increasingly important role.

Reference£º
Patent; CANCER RESEARCH TECHNOLOGY LIMITED; JONES, Keith; RYE, Carl; CHESSUM, Nicola; CHEESEMAN, Matthew; PASQUA, Adele Elisa; PIKE, Kurt Gordon; FAULDER, Paul Frank; WO2015/49535; (2015); A1;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4442-54-0,2,3-Dihydro-1,4-benzodioxine-6-carboxylic acid,as a common compound, the synthetic route is as follows.

To a stirred solution of 0.59 G (3.3 MMOL) of 1, 4-benzodioxane-6-carboxylic acid in CH3CN (30 mL) in A-10¡ãC methanol-ice bath is added sequentially DIEA (1.65 mL, 9.5 mmol), 3 (R)-aminoquinuclidine dihydrochloride (0.62 g, 3.11 MMOL) and HATU (1.18 G, 3.11 mmol). The mixture is stirred AT-10¡ãC for 1 h, followed by warming to rt and stirring overnight. The mixture is CONCENTRATED IN VACUO to a yellow residue. The crude product is purified by flash chromatography on SIO2. Elution with CHCI3-MEOH-NH40H (90: 9: 1) gave 634 mg (71 percent) of a light yellow solid. MS (ESI) M/E 289 [M+H]. The free base (0.2220 g) and L-MALIC acid (0.107 g) are added to 1 ml of acetonitrile in a 50 ml round bottom flask. The slurry is heated on a steam bath until the solution clarified. The solution was slow cooled at rt until precipitate begins to form. The solution is sonicated to induce more rapid crystallization. Solids are filtered by vacuum filtration. Yield was 95.6percent. Analysis calculated FOR C16H20N2O3 No. C4H6O5: C, 56.87 ; H, 6.20 ; N, 6.63. Found: C, 56.66 ; H, 6.26 ; N, 6.81.

4442-54-0, The synthetic route of 4442-54-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; PHARMACIA & UPJOHN COMPANY; WO2004/99202; (2004); A1;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

2,3-Dihydro-1,4-benzodioxine-6-carboxylic acid, cas is 4442-54-0, it is a common heterocyclic compound, the benzodioxans compound, its synthesis route is as follows.,4442-54-0

Working Example 17 A mixture of 1,4-benzodioxane-6-carboxylic acid (0.5 g), benzene (20 m) and thionyl chloride (5 m) is heated for one hour under reflux. The reaction mixture is evaporated to dryness under reduced pressure. To the residue is added benzene (50 m), then the solvent is again distilled off to leave 1,4-benzodioxane-6-carbonyl chloride.

As the rapid development of chemical substances, we look forward to future research findings about 4442-54-0

Reference£º
Patent; Takeda Chemical Industries, Ltd.; EP318235; (1991); A3;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem