Day: September 27, 2020

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.

EXAMPLE 6 In analogy to Example 5, from 6.5 g of 6-acetyl-1,4-benzodioxane and 16.4 g of diethyl 4-carbethoxybenzyl)phosphonate, there were obtained, after filtration of the crude product over a column (silica gel, eluding agent hexane/ethyl acetate=9:1) and recrystallization from hexane/ethyl acetate, 7.3 g of ethyl p-[(E)-2-(1,4-benzodioxan-6-yl)propenyl]benzoate in the form of colorless crystals, m.p. 64-66 C. In analogy to Example 2, by hydrolysis of the thus-obtained ester, there was obtained p-[(E)-2-(1,4-benzodioxan-6-yl)propenyl]benzoic acid in the form of white crystals, m.p. 172-173 C. (from ethyl acetate)., 2879-20-1

As the rapid development of chemical substances, we look forward to future research findings about 2879-20-1

Reference£º
Patent; Hoffmann-La Roche Inc.; US5037825; (1991); A;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

3663-80-7, 2,3-Dihydrobenzo[b][1,4]dioxine-2-carboxylic acid is a benzodioxans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,3663-80-7

The compound c ‘, HATU (2.0 equiv) was weighed into a reaction tube, evacuated, protected with argon, and dissolved in methylene chloride. DIPEA (3.0 equiv) was added dropwise at -15 ¡ã C and N-Boc-piperazine 1.5 equiv) was dissolved in methylene chloride, slowly added dropwise at -15 ¡ã C, and stirred overnight (12 h). (PE: EA = 2: 1) (successively eluted with PE: EA = 3: 1) to give a white solid, which is the compound d ‘ , Yield 97percent, optical purity 94percent ee (Chiralpak AD-H, 20percent isopropanol / hexane, 1.0 ml / min, tR (minor) = 6.2 min, tR (major) = 7.6 min).

The synthetic route of 3663-80-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Guangzhou Institute Of Biomedicine And Health Chinese Academy Of Sciences; Cai, Qian; Huang, Yusha; (17 pag.)CN105985328; (2016); A;,
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

The 178mg (1mmol) 6- acetyl-1,4-benzo-dioxane, 80mg (2mmol) sodium hydroxide was placed in 50mLSingle neck flask was added 10mL of ethanol and dissolved; the 280mg (0.97mmol) 2- fluoro -4- (9- (9H- carbazol-yl))Benzaldehyde was dissolved in 10mL of dichloromethane, ethanol and added dropwise to the mixture, stirred at room temperature overnight, filtered,Ethanol, washed with petroleum ether and dried to give a pale yellow solid (LJZ-6-18) 386mg, 89% yield.

2879-20-1 is used more and more widely, we look forward to future research findings about 1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone

Reference£º
Patent; Institute of Materia Medica Chinese Academy of Medical Sciences; Xiaozhi, Yan; Ye, Fei; Guo, Zongru; Tianjin, Ying; Liu, Junzheng; Zhang, Shuen; Nie, Feilin; Tao, Rongya; Zhang, Xiaolin; Liu, Junchang; He, Yibo; Ma, Yiming; (36 pag.)CN102382037; (2016); B;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

261767-10-6, Ethyl 2,3-dihydrobenzo[b][1,4]dioxine-5-carboxylate is a benzodioxans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,261767-10-6

Example 5 5-hydroxymethyl-1,4-benzodioxan (5). To a suspension of lithium aluminum hydride (7.0 g, 0.18 mmol) in dry diethyl ether (100 mL) was added a solution of ethyl 1,4-benzodioxan-5-carboxylate (35 g, 0.17 mmol) in diethyl ether (100 mL). After boiling under reflux for 2 h, the reaction mixture was cooled to 0 C. and carefully treated with water (35 mL) and 4N aqueous sodium hydroxide (35 mL). The resulting mixture was filtered and dried (Na2SO4). Evaporation of the solvents afforded 25 g (88%) crystalline title compound: mp 51-53 C.; 1H NMR (CDCl3) delta 2.50 (s, 1H), 4.20-4.3 (m, 4H), 4.60 (s, 2H), 6.75-6.90 (m, 3H).

As the paragraph descriping shows that 261767-10-6 is playing an increasingly important role.

Reference£º
Patent; H. Lundbeck A/S; US2002/32205; (2002); A1;,
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: 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 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; 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

2,3-Dihydrobenzo[b][1,4]dioxine-2-carboxylic acid, cas is 3663-80-7, it is a common heterocyclic compound, the benzodioxans compound, its synthesis route is as follows.

Method I Ba (1 mmol) and 2,3-dihydrobenzo[b][1,4]dioxin-6-carboxylic acid (or 2,3-dihydrobenzo[b][1,4]dioxin-2-carboxylic acid) (1 mmol) together with EDCI (1.5 mmol) and HOBt (0.05 mmol) in CH2Cl2 (20 mL) were refluxed at room temperature for 10 h. While the reaction completed, the solution was washed with water for three times (30 mL each time). The remaining water layer was extracted by EtOAc for three times (30 mL each time). The organic layers (CH2Cl2 and EtOAc) were combined and then evaporated. The separated solid was crystallized from mixture of DMF and ethanol (9:1) to obtain the corresponding compound as translucent solid. 4.5.21 (3,5-Bis(4-methoxyphenyl)-4,5-dihydro-1H-pyrazol-1-yl)(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methanone (D6) White crystal, mp: 171-172 ¡ãC. 1H NMR (CDCl3, 300 MHz) delta: 3.19-3.25 (d, J = 17.7 Hz, 1H), 3.69-3.78 (m, 1H), 3.81 (s, 6H), 4.33-4.39 (m, 1H), 4.56-4.60 (d, J = 10.1 Hz, 1H), 5.53-5.56 (m, 2H), 6.81-6.83 (d, J = 7.2 Hz, 2H), 6.89-6.93 (m, 4H), 7.14-7.16 (d, J = 8.7 Hz, 2H), 7.43-7.46 (d, J = 8.1 Hz, 2H), 7.78-7.80 (d, J = 7.8 Hz, 2H). MS (ESI): 445.17 (C26H25N2O5, [M+H]+). Anal. Calcd for C26H24N2O5: C, 70.26; H, 5.44; N, 6.30; O, 18.00. Found: C, 69.87; H, 5.44; N, 6.33., 3663-80-7

As the rapid development of chemical substances, we look forward to future research findings about 3663-80-7

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

29668-44-8, 2,3-Dihydrobenzo[b][1,4]dioxine-6-carbaldehyde is a benzodioxans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,29668-44-8

General procedure: To a mixture of aldehyde 1 (10.0 mmol) in 30% methanol aqueous solution, NH2OH¡¤HCl (0.695 g, 10.0 mmol) was added slowly. After the NH2OH¡¤HCl was fully dissolved, Na2CO3 (0.53 g 5.0 mmol) was added and then the resulting mixture was stirred at room temperature for 2 h. The reaction mixture was diluted with water and extracted with CH2Cl2. The organic phase was dried to afford intermediate 2 as white solids.

The synthetic route of 29668-44-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Pang, Guang Xian; Niu, Chao; Mamat, Nuramina; Aisa, Haji Akber; Bioorganic and Medicinal Chemistry Letters; vol. 27; 12; (2017); p. 2674 – 2677;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

274910-19-9, (2,3-Dihydrobenzo[b][1,4]dioxin-5-yl)methanol is a benzodioxans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,274910-19-9

A solution of the above alcohol (3.75 g, 32.3 mmol) in Et2O (80mL) was cooled to 0 C and phosphorous tribromide (3.67 mL, 38.8mmol) was added dropwise. The solution was stirred at 0 C for 10min, then at 20 C for 1 h. Water (10 mL) was added cautiously toquench the excess of reagent and the mixture was diluted withdiethyl ether and washed with water (3 50 mL). The combinedorganic layers were washed with brine (100 mL), dried over Na2-SO4, filtered and concentrated under reduced pressure to obtain5-(bromomethyl)-2,3-dihydrobenzo[b][1,4]dioxine as a brownsolid (4.61 g, 62%). 1H NMR (CDCl3, 400 MHz) d 6.91-6.77 (m,3H), 4.52 (s, 2H), 4.35-4.33 (m, 2H), 4.29-4.27 (m, 2H). Found:[M+H-Br] = 149.5.

As the paragraph descriping shows that 274910-19-9 is playing an increasingly important role.

Reference£º
Article; Sutherland, Hamish S.; Tong, Amy S.T.; Choi, Peter J.; Conole, Daniel; Blaser, Adrian; Franzblau, Scott G.; Cooper, Christopher B.; Upton, Anna M.; Lotlikar, Manisha U.; Denny, William A.; Palmer, Brian D.; Bioorganic and Medicinal Chemistry; vol. 26; 8; (2018); p. 1797 – 1809;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

2,3-Dihydrobenzo[b][1,4]dioxine-6-carbaldehyde, cas is 29668-44-8, it is a common heterocyclic compound, the benzodioxans compound, its synthesis route is as follows.

General procedure: Aqueous NaOH (1.6 mL of 6 M solution) was added to a stirred solution of the urea-hydrogen peroxide complex (1:1) (6 g, 63.4 mmol) and aldehyde 3a-f (4.28 mmol) in 20 mL of CH3OH at rt. The reaction mixture was stirred at reflux for 1 h followed by the addition of the urea-hydrogen peroxide complex (1.5 g, 15.85 mmol) and reflux for 30 min. The reaction mixture was brought to rt, and the pH was adjusted to 3 with 18percent aqueous HCl. The precipitate was filtered, washed with 2 50 mL of ice water, and dried to afford 4a-f (82-94percent yield) as an off-white solid. For 4e, the reaction mixture was brought to rt, and the pH was adjusted to 3 with 18percent aqueous HCl. Methanol was evaporated, then the reaction mixture was diluted by 30 ml of water and extracted by CHCl3. Organic solution was washed by water, evaporated, and dried., 29668-44-8

As the rapid development of chemical substances, we look forward to future research findings about 29668-44-8

Reference£º
Article; Titov, Ilia Y.; Sagamanova, Irina K.; Gritsenko, Roman T.; Karmanova, Irina B.; Atamanenko, Olga P.; Semenova, Marina N.; Semenov, Victor V.; Bioorganic and Medicinal Chemistry Letters; vol. 21; 6; (2011); p. 1578 – 1581;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

4442-53-9,2,3-Dihydrobenzo[b][1,4]dioxine-5-carboxylic acid, cas is 4442-53-9, it is a common heterocyclic compound, the benzodioxans compound, its synthesis route is as follows.

Synthesis of 7-(chlorosulfonyl)-2,3-dihydrobenzo[b] [l,4]dioxine-5-carboxylic acid (XIII):To a stirred solution of 2,3-dihydrobenzo[b][l,4]dioxine-5-carboxylic acid XII (0.5 g, 2.77 mmol) was added chlorosulphonic acid (1.2 ml, 16.6 mmol) at 0¡ãC under nitrogen atmosphere and the resulting mixture was heated at 70¡ãC for 3 h. After completion of reaction, the reaction mixture was cooled, quenched with ice and extracted with DCM. The organic layer was dried over Na2S04 and evaporated under reduced pressure to afford product XIII in 75percent yield.

As the rapid development of chemical substances, we look forward to future research findings about 4442-53-9

Reference£º
Patent; AGIOS PHARMACEUTICALS, INC.; SALITURO, Francesco, G.; SAUNDERS, Jeffrey, O.; WO2011/72174; (2011); A1;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem