Day: March 5, 2021

144690-92-6,Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter. Which mentioned a new discovery about 144690-92-6.

1L glass reaction flask was added with 500ml of 75% acetic acid, 100.0g of intermediate 2 was added with stirring, and the mixture was heated to stirAfter 45-55 C, after 2 hours of incubation, reduce the temperature to 20-30 C, add 125ml of water, stir for 30 minutes, filter, filter cake with 100ml of 75% acetic acid, transfer the filtrate to 3L glass reaction bottle, The filtrate was successively added with 1000 ml of dichloromethane and 1000 ml of water, and the mixture was stirred and the organic layer was temporarily stored. The aqueous layer was extracted with 500 ml of dichloromethane, and the organic layer was combined. The organic layer was washed with 1000 ml of water, and the organic layer was washed with 5% carbonic acid. The aqueous sodium hydrogen solution was adjusted to rhoEta=6.0~7.0 (about 600 ml), and the organic layer was washed with 500 ml of water, and the organic layer was separated. The organic layer was concentrated under reduced pressure at 30-40 C until no significant solvent was discharged, and 300 ml was added. Ethyl acetate was stirred and crystallized at 20-30 C for 1 hour, filtered, and the filter cake was rinsed with 300 ml of ethyl acetate. The filter cake was blast dried at 40-50 C for 8 hours to obtain a white solid 60.0 g. (product), yield 86.0%, HPLC: 99.0%.

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Reference£º
Patent; Jiashi (Hunan) Pharmaceutical Technology Co., Ltd.; Dai Yongzhi; Liu Hu; Zhu Laifa; Cai Jian; (8 pag.)CN108341804; (2018); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 80841-78-7. In a patent£¬Which mentioned a new discovery about 80841-78-7, molcular formula is C5H5ClO3, introducing its new discovery.

Example 5: The reaction part was charged with ethyl 4- (1-hydroxy-1-methylethyl) -2-propyl-1- {4- [2- (trityltetrazol-5-yl) phenyl] 22 g of 5-carboxylate (Formula 4), 3.1 g of sodium hydroxide and 90 mL of ethanol were added and the mixture was stirred at 20 to 25 C for 4 to 5 hours. When the reaction was completed, the reaction solution was concentrated. To the residue were added 50 mL of ethyl acetate and 50 mL of purified water. The mixture was stirred for 1 hour and then layered. The separated organic layer was washed twice with an aqueous solution containing 30 g of salt and 170 mL of purified water. 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 Respectively. After the filtrate was concentrated under reduced pressure, 50 mL of N, N-dimethylacetamide was added to the residue, the temperature was adjusted to 5 to 10 DEG C 4 g of potassium carbonate was added and 6.2 g of 4- (chloromethyl) -5-methyl-1,3-dioxol-2-one (Formula 6) was dissolved in N, N-dimethylacetamide 6 ML was added dropwise, and the mixture was reacted at 45 to 50 C for 4 hours with stirring. When the reaction is completed, the reaction solution is cooled to 20 to 25 After cooling, 220 mL of ethyl acetate, 30 g of salt and 170 mL of purified water were added successively. The organic layer was separated And then washed once more with an aqueous solution containing 30 g of salt and 170 mL of purified water. The organic layer was washed with 1 g of activated carbon, 20 g of sodium was added and stirred for 30 minutes to 1 hour, followed by filtration. The filtrate was concentrated under reduced pressure, and then acetone 100 mL of i-tril was added, and the mixture was stirred at 50 to 55 C for 1 hour. The crystals were cooled to 0 to 5 [deg.] C and stirred for 2 hours. Followed by washing with 50 mL of isopropyl alcohol, followed by drying to obtain 21.6 g (yield: 88%) of tritylolemecanemethoxysilane (formula 1a) Purity 99.97%) was obtained

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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

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

A solution of MTT in an organic solvent and water (20%) was heated for 4-8 hrs at reflux. When the solvents were either acetonitrile (ACN), isopropyl alcohol (IPA) or t-butanol (t-BuOH), 1 volume of water was added, and the reaction was stirred until the amount of MTT was less than 2%. The mixture was evaporated to dryness. Ethyl acetate (EtOAc, 1 volume) was added to the residue and then evaporated again (twice). The resulting solid was dissolved in EtOAc (12 vol) and heated to reflux. The solution was cooled (2 C.) and stirred for 2 hrs. The product was filtered, washed (EtOAc, 1 vol), and dried on vacuum (45 C.). Table 1 shows the process details with different organic solvents: TABLE 1 Total solvent Time Solvent(s) Volume Temperature ( C.) (hrs) pH ACN:H2O 5:1 + 1 85 7 4.89-4.3 IPA:H2O 5:1 + 1 85 7 4.62-4.25t-BuOH:H2O 5:1 + 1 85 7 4.78-4.28n-propanol:H2O 5:1 reflux 2.5 4.3n-BuOH:H2O 5:1 110 2.5 4.412-BuOH:H2O 5:1 100 3 4.5iso-penthanol:H2O 5:1 100 3 5DMA:H2O 5:1 100 4 4.5DMF:H2O 5:1 100 4 4.5, 144690-92-6

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Reference£º
Patent; Hedvati, Lilach; Pilarsky, Gideon; Shenkar-Garcia, Natalia; US2006/148870; (2006); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

80841-78-7,Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction by binding to a specific portion of an enzyme and thus slowing or preventing a reaction from occurring. Which mentioned a new discovery 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.

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Reference£º
Patent; CIPLA LIMITED; CURTIS, Philip, Anthony; WO2008/43996; (2008); A2;,
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

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%. 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; Zhejiang Huahai Pharmaceutical Co., Ltd.; Xiong Xueqiang; Li Guoxiang; Wang Jiquan; (6 pag.)CN103880825; (2019); B;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

80841-78-7,Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction by binding to a specific portion of an enzyme and thus slowing or preventing a reaction from occurring. Which mentioned a new discovery about 80841-78-7.

Example 96.20 g of (III) were suspended in a mixture of 15.5 ml of tetrahydrofuran:dimethyl sulfoxide (2:3, v/v). The mixture was cooled to 17C in order to add 0.45 g (1.3 equivalents) of sodium hydroxide. The mixture was then heated to 60C. After two hours 1 .55 g (1 .1 equivalents) of potassium carbonate were added to the mixture. The mixture was heated to 70C and 1 .41 g of (IV) dissolved in 16.2 ml of tetrahydrofuran were added to the mixture over 1 .5 hours. The reaction was completed in one hour. The mixture was cooled to room temperature. The mixture was then washed three times with a 29% solution of sodium chloride in water. Finally, the organic solvent was distilled and 18.6 ml of ethyl acetate were added. Finally (V) was crystallised from ethyl acetate by cooling. The mixture was cooled to 0-5C, it was filtered, washed with ethyl acetate and heptane and the resulting solid was dried in a heat cabinet. 5.54 g of (V) were obtained (80% yield). The resulting solid was analysed by HPLC, showing a purity of more than 97%.

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Reference£º
Patent; INTERQUIM, S.A.; JOVE MARTI, Iban; MARQUILLAS OLONDRIZ, Francisco; WO2012/55994; (2012); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

37830-90-3,In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a article,4,5-Dimethyl-1,3-dioxol-2-one,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).

The catalyzed pathway has a lower Ea, but the net change in energy that results from the reaction is not affected by the presence of a catalyst. In my other articles, you can also check out more blogs about 4,5-Dimethyl-1,3-dioxol-2-one.C5H6O3

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

144690-92-6,Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter. Which mentioned a new discovery about 144690-92-6.

Example 1323.88 g of (V) were suspended in 92 ml of acetonitrile. The mixture was cooled to 5C in order to add 24.6 ml of 6N HCI. The mixture was stirred for 2 hours at 5C. 150 ml of toluene were added. The pH was adjusted to 5.7 with potassium bicarbonate. The mixture was filtered in order to eliminate part of the salts generated. The solid was washed with 30 ml of acetonitrile. The phases were separated. The acetonitrile present in the organic phase was distilled. The mixture was cooled and filtered. The solid was washed with toluene and water. (VI) was dried in a heat cabinet. 16.66 g of (VI) were obtained (85% yield).

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Reference£º
Patent; INTERQUIM, S.A.; JOVE MARTI, Iban; MARQUILLAS OLONDRIZ, Francisco; WO2012/55994; (2012); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

In an article, published in an article,once mentioned the application of 144690-92-6,molecular formula is , is a conventional compound. this article was the specific content is as follows. 144690-92-6

Example 236.0 g (50.3 mmol) ethyl 4-(1-hydroxy-1-methylethyl)-2-propyl-1-{4-[2-(trityltetrazol-5-yl)-phenyl]phenyl}-methyl imidazole-5-carboxylate (Va) and 3.0 g (75.4 mmol) of NaOH were suspended in 413 ml dimethylacetamide. The suspension was then stirred at room temperature for 20 h and after that 6.9 g (50.3 mmol) of K2CO3, were added. The mixture was cooled to 0 C. and solution of 15.4 g (70.4 mmol) 4-chloromethyl-5-methyl-2-oxo-1,3-dioxolene in 39 ml of dimethylacetamide were slowly added. The mixture was slowly heated to 50 C. and stirred at this temperature for 2 h. After esterification was completed, the mixture was cooled to 10 C. and poured into a mixture of 625 ml of ethyl acetate and 625 ml of 10% NaCl, and stirred at 25 C. for 15 min. The phases were separated and organic phase was washed 2¡Á with 500 ml of 10% NaCl, dried over Na2SO4 and filtered. The filtrate was concentrated up to ? (approximately 270 g) at reduced pressure.To the resulting solution, 80 ml of ethanol and 8.3 ml (100 mmol) of conc. HCl were added and stirred at 24-26 C. for 3 h. To the cooled mixture 600 ml of water was added and pH of the suspension was estimated to 5 by addition of 5 M NaOH. The phases were stirred for 15 min and separated. Water phase was reextracted with 150 ml of ethyl acetate. Collected organic phases were dried over Na2SO4, filtered and concentrated under reduced pressure. 560 ml of ethyl acetate were added and the mixture was evaporated again. After that, 300 ml of ethyl acetate were added and the mixture was cooled to 20 C. and stirred for 1 h, filtered off and washed with 20 ml of fresh ethyl acetate. The yield of the product (I) was 21 g (75%).

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Reference£º
Patent; KRKA; US2009/131680; (2009); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 144690-92-6. In a patent£¬Which mentioned a new discovery about 144690-92-6, molcular formula is C48H44N6O6, introducing its new discovery.

Trityl olmesartan medoxomil (250 g, 310 mmol) (97.3 % area) is dissolved in THF (1560 ml) and 48 % aqueous hydrobromic acid (70.6 ml, 625 mmol) is added slowly. The mixture is stirred for at 25 C. After 1 hour the precipitate forms. The mixture is stirred for 1 additional hour at 25 C, then cooled to -5 C and stirred for 1.5 hours at -5 C. The precipitate is filtered. 940 ml of THF is added to the precipitate and the mixture is stirred for 1 h at 25 C and then 1 hour at -5 C. Then precipitate is filtered off and washed with cold THF (150 ml). It is then dissolved in a mixture of water (875 ml) and acetone (440 ml). To a clear solution 5 % aqueous solution of NaHCO3 is added to raise pH to 5.15. The mixture is stirred for 1 hour at room temperature and 1 hour at 0 C. The precipitate is filtered, washed with water and then recrystallized from a mixture of acetonitrile (280 ml) and water (70 ml) to give 124.5 g of olmesartan medoxomil (99.68 % area)

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