Heterocyclic Building Blocks-benzodioxan

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2879-20-1,1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone,as a common compound, the synthetic route is as follows.

General procedure: Carbonyl substrate, 0.02 mol, was added in portions to a suspension of 0.01 mol NaBH4 in 0.3 mol of the corresponding alcohol solvent, and the mixture was stirred for 2-2.5 h at 20C. The resulting boron derivatives of benzyl alcohols were decomposed with 10% aqueous HCl (3.7 mL), and the mixture was stirred for a required time at a required temperature(see Tables 1-5), cooled, and poured into 200 mL of cold water. The products were extracted with diethylether (2 ¡Á 40 mL), the combined extracts were washed with water and dried over anhydrous sodium sulfate, the solvent was distilled off on a rotary evaporator, and the residue was analyzed by 1H NMR. If necessary,benzyl ethers were isolated by chromatography. Alcohol coreactants poorly soluble in water were removed from the diethyl ether extracts by vacuum distillation, and the target ethers ware isolated from the still residue. Ethers 2a [9], 2c [3], 2h, 4a [10], 4b [11], 4i,4l, 7e, 10c, 10d, 10e [4], and 13a [12] were described previously. Ethers 2b, 2d-2g, 2i, 4c-4h, 4j, 4k, 4m-4w, 7a-7d, 7f, 7g, and 13b-13f are mobile liquids, and 7h-7j, 10a, 10b, and 10f-10i are viscous liquids.

2879-20-1 1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone 76143, abenzodioxans compound, is more and more widely used in various.

Reference£º
Review; Mochalov; Fedotov; Trofimova; Zefirov; Russian Journal of Organic Chemistry; vol. 52; 4; (2016); p. 503 – 512; Zh. Org. Khim.; vol. 52; 4; (2016); p. 503 – 512,10;,
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.2879-20-1,1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone,as a common compound, the synthetic route is as follows.

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.

The synthetic route of 2879-20-1 has been constantly updated, and we look forward to future research findings.

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

2879-20-1, 1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethanone is a benzodioxans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a stirred solution of coptisine (250 mg, 0.70 mmol) in 5 N NaOH (1 ml), 6-acetyl-1,4-benzodioxane (1 mL,6.67 mmol) was added slowly. The reaction mixture was stirred at 60C for 3 h. The reaction mixture was extracted withCHCl3/MeOH (v/v = 10:1). The organic layer was washed to neutral with water, and dried over anhydrous MgSO4, andfiltered, and then concentrated under reduced pressure to give intermediate product. The intermediate product wasdissolved in anhydrous tetrahydrofuran (5 mL) followed by addition of HOAc (0.5 mL) and formaldehyde (1.5 mL, 15.06mmol) dropwise. The reaction mixture was kept refluxing for 3 h. After the reaction completed, the reaction mixture wasconcentrated and added with 2 N HCl (2 mL), then stirred at room temperature for 1 h and extracted with CHCl3/MeOH(v/v = 10:1). The organic layer was dried over anhydrous MgSO4 and then filtered and concentrated under reducedpressure to give crude product, which was purified via silica gel column chromatography (CHCl3/MeOH (v/v) =20:1) togive pure yellow solid (110 mg, 28.1% yield).1H-NMR (DMSO-d6) delta: 2.95 (s, 3H, ArCH3), 2.99-3.14 (m, 2H, NCH2CH2), 4.37 (br d, J= 9.0 Hz, 4H, O CH2CH2O), 4.54(br s, 2H, NCH2CH2), 6.19 (s, 2H, OCH2O), 6.24 (s, 1H, OCH2O), 6.44 (s, 1H, OCH2O), 6.86 (s, 1H, C=CH2), 6.99 (s,1H, C=CH2), 7.10 (d, J = 8.4 Hz, 1H, ArH),7.17 (s, 1H, ArH), 7.44 (s, 1H, ArH), 7.45 (d, J = 2.1 Hz, 2H, ArH), 7.54 (dd,J1 = 8.4 Hz, J2 = 2.1 Hz, 1H, ArH), 8.07 (s, 2H, ArH).

The synthetic route of 2879-20-1 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Institute of Mataria Medica, Chinese Academy of Medical Sciences; QIN, Hailin; WANG, Wenjie; ZHANG, Zhihui; WU, Lianqiu; DENG, Anjun; YU, Jinqian; LI, Zhihong; EP2789612; (2014); 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.

General procedure: A mixture of acetophenone 1a (120 mg, 1.0 mmol), benzylamine 2a (160.7 mg, 1.5 mmol), and iodine (507.6 mg, 2.0 mmol) in DMSO (3 mL) was stirred at 100 C for 5 h. After disappearance of the reactant (monitored by TLC), and added 50 mL water to the mixture, then extracted with EtOAc three times (3 50 mL). The extract was washed with 10% Na2S2O3 solution (w/w), dried over anhydrous Na2SO4 and evaporation. The residue was purified by column chromatography on silica gel (petroleum ether/EtOAc=100:1) to yield the desired product 3aa as a white solid (183.4 mg, 83% yield).

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

Reference£º
Article; Gao, Qing-He; Fei, Zhuan; Zhu, Yan-Ping; Lian, Mi; Jia, Feng-Cheng; Liu, Mei-Cai; She, Neng-Fang; Wu, An-Xin; Tetrahedron; vol. 69; 1; (2013); p. 22 – 28;,
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.

General procedure: The dipeptides after appropriate deprotection and the amino acid methyl esters were coupled with 1,4-benzodioxane-2-carboxylic acid using DCC as acoupling reagent and TEA as a base in different reaction conditions like microwave, sonication, refluxing and conventional methods to give the desired products (2a-2e) (Scheme-2).

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

Reference£º
Article; Malipeddi, Himaja; Gowda, Visruth; Das, Moonjit; Indian Journal of Heterocyclic Chemistry; vol. 25; 2; (2015); p. 113 – 118;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

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.

Example 70aethyl-4-amino-5-(2-(2,3-dihydrobenzo[b][1,4]dioxine-5-carboxamido)-2-methylpropoxy)-2-methylquinoline-3-carboxylatePrepared as in Example 24a from 4-amino-5-(2-amino-2-methylpropoxy)-2-methylquinoline-3-carboxylate (Example 24b) and 2,3-dihydrobenzo[b][1,4]dioxine-5-carboxylic acid as a brown solid. MS 480 (MH+).

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

Reference£º
Patent; SENOMYS, INC.; US2011/245353; (2011); 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.

The 534mg (3mmol) 6- acetyl-1,4-benzo-dioxane, 160mg (4mmol) of sodium hydroxide in 100mL single-neck flask, add 10 drops of water, 20mL ethanol and dissolved; the 813mg (3mmol) 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-5-32) 842mg the yield was 65%.

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

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

31127-39-6, 2,3-Dihydrobenzo[b][1,4]dioxine-6-carbaldehyde oxime is a benzodioxans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

177 mg of the intermediate XXV was dissolved in ethanol, a catalytic amount of palladium hydroxide was added, the air was replaced and hydrogen was introduced, and the reaction was carried out at 30-60 C. for 6 hours. After the reaction was completed, ethanol was distilled off under reduced pressure, and water was added to the residue. Ester extraction, without purification, gives the intermediate 1,4-benzodioxane-7-methylamine directly for the next reaction

As the paragraph descriping shows that 31127-39-6 is playing an increasingly important role.

Reference£º
Patent; East China University of Science and Technology; Chinese Academy Of Sciences Shanghai Pharmaceutical Institute; Li Jian; Lan Lefu; Ni Shuaishuai; Chen Feifei; Wei Hanwen; Li Baoli; Liu Yifu; Mao Fei; Zhu Jin; (157 pag.)CN108117534; (2018); A;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem

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.

A. N,N’-Carbonyidiimidazole (1.62 g, 10 mmol) was added to a stirred solution of 2,3-dihydrobenzo[1,4]dioxine-5-carboxylic acid(1.64 g, 10 mmol) in tetrahydrofuran (25 mL) and the resulting solution was heated at 60¡ã C. for 15 minutes. The solution was cooled to room temperature and -4-(aminomethyl)pyridine (1.08 g, 10 mmol) was added. The reaction mixture was heated at 60¡ã C. for 2 hours, cooled, poured into water, and extracted 3 times with ethyl acetate. The combined ethyl acetate extract was dried (Na2SO4) and evaporated in vacuo to a crystalline residue which was triturated with water, filtered, and dried in vacuo to give 2,3-dihydrobenzo[1,4]dioxine-5-carboxylic acid (pyridin-4-ylmethyl)amide as a white solid (1.95 g, 72percent); m.p. 120-121¡ã C.

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

Reference£º
Patent; Syntex (USA) LLC; US6172062; (2001); B2;,
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.

General procedure: Carbonyl substrate, 0.02 mol, was added in portions to a suspension of 0.01 mol NaBH4 in 0.3 mol of the corresponding alcohol solvent, and the mixture was stirred for 2-2.5 h at 20C. The resulting boron derivatives of benzyl alcohols were decomposed with 10% aqueous HCl (3.7 mL), and the mixture was stirred for a required time at a required temperature(see Tables 1-5), cooled, and poured into 200 mL of cold water. The products were extracted with diethylether (2 ¡Á 40 mL), the combined extracts were washed with water and dried over anhydrous sodium sulfate, the solvent was distilled off on a rotary evaporator, and the residue was analyzed by 1H NMR. If necessary,benzyl ethers were isolated by chromatography. Alcohol coreactants poorly soluble in water were removed from the diethyl ether extracts by vacuum distillation, and the target ethers ware isolated from the still residue. Ethers 2a [9], 2c [3], 2h, 4a [10], 4b [11], 4i,4l, 7e, 10c, 10d, 10e [4], and 13a [12] were described previously. Ethers 2b, 2d-2g, 2i, 4c-4h, 4j, 4k, 4m-4w, 7a-7d, 7f, 7g, and 13b-13f are mobile liquids, and 7h-7j, 10a, 10b, and 10f-10i are viscous liquids.

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

Reference£º
Review; Mochalov; Fedotov; Trofimova; Zefirov; Russian Journal of Organic Chemistry; vol. 52; 4; (2016); p. 503 – 512; Zh. Org. Khim.; vol. 52; 4; (2016); p. 503 – 512,10;,
Benzodioxan
1,4-Benzodioxane | C8H8O2 – PubChem