Dioxole related

In an article, published in an article,once mentioned the application of 80841-78-7,molecular formula is , is a conventional compound. this article was the specific content is as follows. 80841-78-7

123.2g of compound and 2.5g of potassium hydroxide solid were added to a 500ml four-necked flask.DMAC76g, heated to 50 C, stirred for about 6h,The TLC dot plate showed that the compound 1 point disappeared, that is, the end of the hydrolysis reaction was judged.Cool to 15 ¡À 5 C, add KBr 0.64g, add DMDO-C16.5g, DMAC 10g,After about 40 minutes, the temperature was raised to 25¡À5C for 2h, then the temperature was raised to 50C, the reaction was about 6h, and the temperature was lowered again to 20¡À5C for 5h. The reaction solution was added with 324g water and 208g of dichloromethane.Shake well and let the layers separate. The aqueous layer was extracted with 70 g of dichloromethane and combined with several layers.It was washed twice with 206 g of water, and the last aqueous layer was extracted with 100 g of dichloromethane.The organic layers were combined and dried under reduced pressure at 45 C.After adding 100g of the upper batch of crystallization, the mother liquid is heated and refluxed for 25¡À5 minutes, and then naturally cooled.Then crystallization at 0 C for 6 h,Drying by suction filtration to obtain 23.2 g of trityl olmesartan medoxomil white solid powder.The yield was 93.4%. HPLC analysis, purity 99.7%, acid miscellaneous <0.05%,The olefinic impurity is <0.1%, and the other unknown single impurities are <0.1%. Do you like my blog? If you like, you can also browse other articles about this kind. Thanks for taking the time to read the blog about 80841-78-7 Reference£º
Patent; Zhejiang Huahai Pharmaceutical Co., Ltd.; Xiong Xueqiang; Li Guoxiang; Wang Jiquan; (6 pag.)CN103880825; (2019); B;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. 80841-78-7, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 80841-78-7, name is C5H5ClO3. In an article£¬Which mentioned a new discovery about 80841-78-7

Example 4; The reaction was carried out in the same manner as in Example 1 except that 4- (1-hydroxy-1-methylethyl) -2-propyl-1- {4- [2- (trityltetrazol-5-yl) phenyl] -carboxylic acid sodium salt (Chemical Formula 5) and 50 mL of N, N-dimethylacetamide were added, the temperature was adjusted to 5 to 10 DEG C and 4 g of potassium carbonate was added. A solution of 6.2 g of 4- (chloromethyl) -5-methyl-1,3-dioxol-2-one (Formula 6) in 6 mL of N, N-dimethylacetamide was added dropwise to the reaction portion, For 4 hours. After the reaction was completed, the reaction solution was cooled to 20 to 25 C, and then 220 mL of ethyl acetate, 30 g of salt, and 170 mL of purified water were sequentially added to the reaction mixture, followed by separation of the organic layer, followed by the addition of 30 g of salt and 170 mL of purified water . & Lt; / RTI & gt; 1 g of activated carbon and 20 g of anhydrous sodium sulfate were added to the organic layer, followed by stirring for 30 minutes to 1 hour, followed by filtration. The filtrate was concentrated under reduced pressure, and 100 mL of acetonitrile was added to the residue, followed by stirring at 50 to 55 DEG C for 1 hour. The crystals were cooled to 0 to 5 C., stirred for 2 hours, filtered, washed with 50 mL of isopropyl alcohol and dried to obtain 21.7 g (yield: 93%, purity: 99.96%) of tritylolemethanemethoxysilane

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 80841-78-7 is helpful to your research. 80841-78-7

Reference£º
Patent; DONGBANG FTL CO., LTD; Song, Tae Hong; Jung, Hun Suk; Jang, Do Yeon; Moon, Chung Sun; Jung, Hee Jung; (18 pag.)KR101526249; (2015); B1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

144690-92-6,is a common compound. C48H44N6O6In an article, once mentioned the new application about 144690-92-6.

A 250 round bottom flask was charged with MTT (10 g), acetone/water (2/2 vol.), and 3 eq of H2SO4. The combination was stirred at room temperature for about 4-6 hrs. Triphenyl carbinol (TPC) was precipitated by adding water and filtered out. NaHC03 was added to the filtrate, and the mixture was cooled to 5C and stirred for 1 hr. Crude olmesartan medoxomil was obtained as white crystals (90% yield).Example 2: Preparation of crude olmesartan medoxomil AIL reactor, equipped with mechanical stirrer and thermometer, was charged with MTT (70 g), acetone (140 ml), water (140 ml), and H2S04 (19.47 g). The reactor was heated to 40C for 2.5 hrs (at EOR, MTT is LT 1%). Water (140 ml) was added at 40C, and the reaction was stirred for 1.5 hrs or until MTT is LT 0.1%. After cooling to 15C and stirring for 1 hr, the TPC was filtered and washed with water (70 ml).NaHC03 was added in portions to the filtrate at room temperature. The reaction mixture was stirred for 1 hr, then filtrated, and the cake was washed with water (140 ml). The solid was dried at 45C in a vacuum oven overnight to obtain crude OLM-Mod (98 % yield).

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Reference£º
Patent; TEVA PHARMACEUTICAL INDUSTRIES LTD.; TEVA PHARMACEUTICALS USA, INC.; WO2006/29056; (2006); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

80841-78-7,is a common compound. C5H5ClO3In an article, once mentioned the new application about 80841-78-7.

Example 1; Preparation of olmesartan medoxomilTo dimethyl acetamide (300 ml) was added 4-(1-hydroxy-1-methylethyl)-2-propyl imidazol- 5-carboxylic acid ethyl ester (50 gms) and powdered sodium hydroxide (26 gms). To this, 4-[2-(trityltetrazol-5-yl)phenyl]benzyl bromide (135 gms) was charged at 45-500C. The contents were stirred for 5 hours at 45-500C. Diisopropylethyl amine (100 ml) was charged to the reaction mass at 40-450C. A solution of 5-methyl-2-oxo-1 , 3-dioxane-4-yl)methyl chloride (80 gms) diluted with dimethyl acetamide (160 ml) was slowly added to the reaction mass at 40-450C over a period of 1 hour. The contents were heated to 60-650C and maintained for 4 hours. The reaction mass was then cooled to 30-350C and neutralized with concentrated hydrochloride acid. The reaction mass was filtered to remove inorganic impurities, charcoalized using charcoal (10 gms) andstirred for 30 minutes at 40-450C. The reaction mass was filtered over hyflo. The clear filtrate was acidified with hydrochloric acid (100 ml) slowly at 25-30C. The contents were stirred at 60C for 1 hour. The reaction mass was chilled to 0-5C and filtered to remove tritanol. The reaction mass was concentrated under reduced pressure. The residue was quenched with water (500ml), neutralized with base and extracted in dichloromethane (500 ml). The clear dichloromethane extract was then concentrated under reduced pressure and stripped off with acetone. The residue thus obtained was isolated from acetone (250 ml) to give 55 gms of the title compound. Chromatographic purity- > 99%; Example 2Preparation of olmesartan medoxomilTo dimethyl acetamide (600 ml) was added 4-(1-hydroxy-1-methylethyl)-2-propyl imidazol- 5-carboxylic acid ethyl ester (100 gms) and powdered potassium hydroxide (50 gms). To this was charged 4-[2-(trityltetrazol-5-yl)phenyl]benzyl bromide (270 gms) at 45-50C. The contents were stirred for 5 hours at 45-50C. Diisopropylethyl amine (200 ml) was charged to the reaction mass at 40-450C. To this was slowly added a solution of 5-methyl-2-oxo- 1 ,3-dioxane-4-yl)methyl chloride (160 gms) diluted with dimethyl acetamide (320 ml) at 40- 45C over a period of 1 hour. The contents were heated to 60-650C and maintained for 4 hours. The reaction mass was then cooled to 30-350C and was neutralized with concentrated hydrochloride acid. The reaction mass was filtered to remove inorganic impurities. The reaction mass was charcoalized using charcoal (20 gms) and was stirred for 30 minutes at 40-450C. The reaction mass was filtered over hyflo. The clear filtrate was acidified with hydrochloric acid (200 ml) slowly at 25-300C. The contents were stirred at 60C for 1 hour. The reaction mass was chilled to 0-50C and was filtered to remove tritanol. The reaction mass was concentrated under reduced pressure. The residue was quenched with water (1000 ml), neutralized with base and extracted in dichloromethane (1000 ml). The clear dichloromethane extract was then concentrated under reduced pressure, stripped off with acetone. The residue thus obtained was isolated from the acetone (500 ml) to give 110 gms of the title compound. Chromatogrphic purity- > 99%; Example 4Preparation of trityl olmesartan medoxomilTo dimethyl acetamide (300 ml) was added 4-(1-hydroxy-1-methylethyl)-2-propyl imidazol- 5-carboxylic acid ethyl ester (50 gms) and powdered potassium hydroxide (25 gms). To this was charged 4-[2-(trityltetrazol-5-yl)phenyl]benzyl bromide (135 gms) at 45-500C. The contents were stirred for 5 hours at 45-500C. Diisopropylethyl amine (100 ml) was charged to the reaction mass at 40-45C. To this was slowly added a solution of 5-methyl-2-oxo- 1 ,3-dioxane-4-yl) methyl chloride (80 gms) diluted with dimethyl acetamide (160 ml) at 40- 45C over a period of 1 hour. The contents were heated to 60-650C and maintained for 4 hours. The reaction mass was then cooled to 30-350C. and was neutralized with concentrated hydrochloride acid. The reaction mass was filtered to remove inorganics. The reaction mass was charcoalized using charcoal (10 gms) and was stirred for 30 minutes at 40-450C. The reaction mass was filtered over hyflo. The clear filtrate was quenched with purified water(200 ml)at 25-30C over a period of 3-4 hours. The contents were stirred at 25-300C for 30 minutes. Crude trityl olmesartan medoxomil was isolated by filtration, slurried in water (500 ml), centrifuged and dried under reduced pressure at 45-50C.

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 80841-78-7, help many people in the next few years.C5H5ClO3

Reference£º
Patent; CIPLA LIMITED; CURTIS, Philip, Anthony; WO2008/43996; (2008); A2;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

144690-92-6,Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. C48H44N6O6,introducing its new discovery.

Trityl olmesartan medoxomil (8 g, 10 mmol) is dissolved in THF (50 ml) and 48 % aqueous hydrobromic acid (3.5 ml, 30 mmol) is added. The mixture is stirred for 1 hour at room temperature and then 1 hour at 0 C. The precipitate is filtered, washed with cold THF (20 ml) and dried overnight in vacuum at room temperature to give 5.7 g of olmesartan medoxomil hydrobromide Form B (98.6 % area)

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Reference£º
Patent; LEK Pharmaceuticals d.d.; EP2022790; (2009); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

80841-78-7,Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.4-(Chloromethyl)-5-methyl-1,3-dioxol-2-one,introducing its new discovery.

To the flask was added 2000 g of acetone, 160 g of ethyl 4- (1-hydroxy-1-methylethyl) -2-propylimidazole-5-carboxylate (II), 150 g of K2CO3, 460 g of 4- [2- (Trityltetrazol-5-yl) phenyl] benzyl bromide (III), 20g KI, the temperature was raised to reflux, the reaction was incubated for 34-38 hours under stirring.Then add 102g KOH, reflux reaction 6 ~ 8h. Cool to 10 ~ 20 , add 170g DMDO-Cl, incubated for 30 ~ 60min.Heating to reflux, the reaction 22 to 26 hours.After the reaction was added 40g of diatomaceous earth, stirring for 30 to 60 minutes, suction filtration, 200g acetone rinse cake. To the filtrate was added 800g of drinking water and 200g of refined hydrochloric acid, the reaction at room temperature for 2 to 4 hours, filtered to remove by-product triphenylcarbinol. Dropping 10% K2CO3 aqueous solution, adjusting feedstock pH to 4, cooling to 10 ~ 20 , stirring crystallization 2h, filtration, the filter cake with a mixture of pre-cooled 45g acetone and 230g of drinking water washing and drying, to obtain Olmesartan Medoxomil 309 g, total yield 83.1% (relative to ethyl-4- (1-hydroxy-1-methylethyl) -2-propylimidazole-5- carboxylate (II)), purity: 99.27% of the main peak, 0.08% of the olmesartan acid, 0.14% of the triphenylmethanol, and 0.13% of the largest unidentified one.

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Reference£º
Patent; Zhejiang Huahai Zhicheng Pharmaceutical Co., Ltd.; Zhejiang Huahai Pharmaceutical Co., Ltd.; Jin Congyang; Wang Jiquan; Zhang Wenling; Wang Peng; (10 pag.)CN107311990; (2017); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

144690-92-6,Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. C48H44N6O6,introducing its new discovery.

78(b) (5-Methyl-2-oxo-1,3-dioxolen-4-yl)methyl 4-(1-hydroxy-1-methylethyl)-2-propyl-1-{4-[2-(tetrazol-5-yl)phenyl]phenyl}methylimidazole-5-carboxylate 75 ml of water were added to a suspension of 29.3 g of (5-methyl-2-oxo-1,3-dioxolen-4-yl)methyl 4-(1-hydroxy-1-methylethyl)-2-propyl-1-{4-[2-(trityltetrazol-5-yl)phenyl]phenyl}methylimidazole-5-carboxylate [prepared as described in step (a) above] in 225 ml of acetic acid, and the resulting mixture was stirred at 60 C. for 1.5 hours. At the end of this time, 75 ml of water were added to the mixture, which was then cooled. Precipitated trityl alcohol was removed by filtration, and the filtrate was concentrated by evaporation under reduced pressure. Toluene was added to the residue, and the mixture was again concentrated by evaporation under reduced pressure, to remove the remaining water and acetic acid. The residue was crystallized in ethyl acetate, to give 16.6 g of the title compound as crystals, melting at 177-180 C. (with decomposition). The Nuclear Magnetic Resonance Spectrum of this compound was identical with that of the compound obtained as described in Example 61(b).

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 144690-92-6 is helpful to your research. 144690-92-6

Reference£º
Patent; Sankyo Company, Limited; US5616599; (1997); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

37830-90-3,Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like C5H6O3,introducing its new discovery.

Step III: 4-Bromomethyl-5-methyl~l,3-dioxol~2-one; A mixture of 4,5-dimethyl-l,3-dioxol-2-one (1.5 g, 0.013158 mol), NBS (2.34 g, 0.013158 mol) and benzoyl peroxide (0.089 g, 0.0003684 mol) in CCl4 (20 mL) was stirred at 77¡ãC for 6 hrs (TLC monitoring: cyclohexane/AcOEt 6:4). The solution was treated with an aqueous solution OfNaHCO3 and extracted with CH2Cl2. The organic phase was dried over Na2SO4 and concentrated under reduced pressure to give 4-bromomethyl-5 -methyl- 1,3- dioxol-2-one (2.34 g). Yield: 92percent.1H-NMR (400 MHz, CDCl3, delta): 2.13 (s, 3H, CH3), 4.18 (s, 2H, CH2Br).

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.37830-90-3, you can also check out more blogs about37830-90-3

Reference£º
Patent; S.I.M.S. S.r.l. – SOCIETA ITALIANA MEDICINALI SCANDICCI; WO2008/12852; (2008); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. 144690-92-6, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 144690-92-6, name is C48H44N6O6. In an article£¬Which mentioned a new discovery about 144690-92-6

One hundred ml of methanol was added to 10 g of (5-methyl-2-oxo-l,3-dioxol- 4-yl) methyl 4-(2-hydroxypropan-2-yl)-2-propyl-l-((2′-(l-trityl-lH-tetrazol-5-yl) biphenyl-4-yl) methyl)-lH-imidazole-5-carboxylate (Pharmacostech). Then to the reaction mixture was added 10 g of resin pre-treated with hydrochloric acid of pH 2-3 (TRILUE SCR-IO gel type), followed by refluxing for 6 hours. The solid components were filtered out from the reaction mixture and washed with 100 ml of methanol. The solid substance obtained by vacuum distillation of the filter-in solution was dissolved into a small quantity of acetone, and n-hexane was added to the acetone solution to obtain 6.58 g (yield rate: 94%) of the standard compound represent by Formula 9: 1H NMR (300 MHz, DMSO), delta 7.50-7.69 (m, 4H), 7.03 (d, 2H, J=8.0 Hz), 6.85 (d, 2H, >8.0 Hz), 5.41 (s, 2H), 5.22 (s, IH), 5.05 (s, 2H), 2.50 (s, 2H), 2.07 (s, 3H).

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 144690-92-6 is helpful to your research. 144690-92-6

Reference£º
Patent; PHARMACOSTECH CO., LTD.; KIM, Jae Won; CHA, Young Gwan; RYU, Hyung Chul; KIM, Sun Joo; WO2010/67913; (2010); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

144690-92-6,Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like C48H44N6O6,introducing its new discovery.

144690-92-6, 21.6 g of triethylolmethane-containing methoxycinnamic acid (formula 1a), 3 g of hydroxylamine hydrochloride, 14 mL of acetone and 70 mL of ethanol were added to the reaction part, followed by stirring at 25 to 40 C for 4 hours. When the reaction was completed, the reaction solution was concentrated under reduced pressure. Ethyl acetate (80 mL) was added to the residue, and the mixture was stirred for 3 hours to precipitate crystals. The precipitated crystals were stirred at 20 to 25 C for 2 hours, filtered and washed with 20 mL of purified water. To the filtrate was added 40 mL of ethyl acetate, the temperature was cooled to 0 to 5 C, The pH of the filtrate was adjusted to pH 5.0 to 6.0 by adding 45 g of triethylamine to the filtrate, and crystals were slowly precipitated. The precipitated crystals were stirred at 0 to 5 C for 3 hours, filtered, washed with 30 mL of purified water and 30 mL of acetone, and dried under reduced pressure for 15 hours to obtain 12.3 g (yield 82%, purity 99.96%) of olmesartan methoxysilane (Formula 1b).

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 144690-92-6, help many people in the next few years.C48H44N6O6

Reference£º
Patent; DONGBANG FTL CO., LTD; Song, Tae Hong; Jung, Hun Suk; Jang, Do Yeon; Moon, Chung Sun; Jung, Hee Jung; (18 pag.)KR101526249; (2015); B1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem