Dioxole related

144690-92-6, A common heterocyclic compound, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.”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

The chemical industry reduces the impact on the environment during synthesis, Triphenyl methyl olmesartan, , I believe this compound will play a more active role in future production and life.

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

In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact.37830-90-3, 4,5-Dimethyl-1,3-dioxol-2-one it is a common compound, a new synthetic route is introduced below.37830-90-3

PREPARATION 18 4-Carbo-(5-methyl-2-oxo-1,3-dioxol-4-ylmethoxy)methylpiperazine hydrochloric acid salt Combine 4,5-dimethyl-1,3-dioxol-2-one (3.42 g, 30 mmol), N-bromosuccinimide (5.34 g, 30 mmol) and AIBN (500 mg, 3 mmol) in anhydrous carbon tetrachloride (100 mL). Heat at reflux. After 2 hours, cool and filter. Concentrate the filtrate to give 4-bromomethyl-5-methyl-1,3-dioxol-2-one (6.5 g, crude) as an oil, which can be used for the next step without further purification.

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand 4,5-Dimethyl-1,3-dioxol-2-one reaction routes.

Reference£º
Patent; Hoechst Marion Roussel, Inc.; US5977139; (1999); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact.144690-92-6, Triphenyl methyl olmesartan it is a common compound, a new synthetic route is introduced below.144690-92-6

Example 7; Preparation of olmesartan medoxomilTo 75 % aqueous acetic acid (1000 ml) was slowly added trityl olmesartan medoxomil (110 gms)[prepared as described in example 5] at 25-30C. The contents were stirred at 600C 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 (500 ml), neutralized with a 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 the acetone (250 ml) to give 55 gms of the title compound. Chromatogrphic purity – > 99%

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand Triphenyl methyl olmesartan reaction routes.

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

4-(Chloromethyl)-5-methyl-1,3-dioxol-2-one, A common heterocyclic compound, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.”80841-78-7

130 ml of N,N-dimethylacetamide, 14.0 g (20 mmol) of ethyl 4-(2-hydroxypropan-2-yl)-2-propyl-1-((2′-(1-trityl-1H-tetrazol-5-yl)biphenyl-4-yl)methyl)-1H-imidazole-5-carboxylate and 2.2 g (16 mmol) of KOH were charged into reaction vessel at room temperature under inert atmosphere. The mixture was stirred at room temperature for 2 h, and then the sample of reaction mixture was analysed (HPLC; starting material 0.2 %, hydrolysed starting material 98.11 %). Then 3.0 g (2.2 mmol) of potassium carbonate powder and 1.4 g (8.4 mmol) of potassium iodide were added. The reaction mixture was cooled to 0 C and 5.0 g (33 mmol) of 4-(chloromethyl)-5-methyl-1,3-dioxol-2-one was added at 0 to 5C. After the addition, the reaction mixture was warmed to 40-45 C within one hour, then the mixture was stirred at this temperature for 2h. The sample of reaction mixture was analysed (HPLC; tritylolmesartan medoxomil 97.22 %, 4-(2-hydroxypropan-2-yl)-2-propyl-1-((2′-(1-trityl-1H-tetrazol-5-yl)biphenyl-4-yl)methyl)-1H-imidazole-5-carboxylate 0.09 %). The mixture was cooled to 10 to 20 C and then 250 ml of ethyl acetate was added. The mixture was cooled again to 5-10 C and then 200 ml of 10 % NaCl was added slowly. The temperature should not be higher than 25 C during the addition. The phases were mixed separated and organic phase was washed with 100 ml of 10 % NaCl (2*) and dried over anhydrous sodium sulphate. After the filtration filtrate was evaporated under reduced pressure at temperature under 45C to oily residue. To the residue 30 ml of acetonitrile was added at temperature not more than 45C. The mixture was stirred at this temperature for 10 minutes then was cooled to 20 to 25C and stirred at this temperature for 0.5 h and after that 3h at 0 to 5C. The suspension was filtered, the cake washed with cold acetonitrile and dried at 40 to 50C. Yield: 17.0 g (94%) HPLC: 99.72 % of the product, all impurities are under 0.1%. IR: 3408, 1818, 1805, 1741, 1681, 1529, 1147, 1003, 699 XRD:

The chemical industry reduces the impact on the environment during synthesis, 4-(Chloromethyl)-5-methyl-1,3-dioxol-2-one, , I believe this compound will play a more active role in future production and life.

Reference£º
Patent; Krka Tovarna Zdravil, D.D., Novo Mesto; EP2334668; (2011); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

4-(Chloromethyl)-5-methyl-1,3-dioxol-2-one, A common heterocyclic compound, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.”80841-78-7

188.0kg of tetrahydrofuran was added to a glass-lined reactor, 54.0kg 4- (1- hydroxy-1-methylethyl) -2-propyl-1- {4- [2- (trityl-tetrazol -5 – yl) phenyl] phenyl} methylimidazole-5-carboxylate, 92.0.0kg 4.0kg purified water and lithium hydroxide monohydrate.After complete addition, 20 stirred for 18 hours, once every 2 hours the reaction temperature recording, tracking and detection TLC starting material to substantially complete the reaction.After completion of the reaction, 240.0kg Ethyl acetate and sodium chloride solution (20.0 kg of sodium chloride was added to 180.0kg purified water, and dissolved with stirring), stirred for 10 minutes, allowed to stand for 20 minutes stratification.The organic phase was washed with sodium chloride solution (32.0 kg of sodium chloride was added to 288.0kg purified water, stirred and dissolved) Average washed twice, each wash was stirred for 10 minutes and allowed to stand for 20 minutes.The organic phase was collected, dried over anhydrous sodium sulfate and stirred for 4 hours.Filtered, and the filtrate was concentrated under reduced pressure to remove ethyl acetate (water bath temperature controlled at 45 ¡À 5 , the degree of vacuum at -0.1 ~ -0.06MPa), a solution 188.0kg N, N- dimethylformamide, is added 15.3kg anhydrous potassium carbonate, 2.7kg of potassium iodide was stirred at 20 ¡À 10 was slowly added 14.5kg 4- chloro-5-methyl-1,3-dioxol-2-one, addition was completed, heating, feed temperature control reaction was stirred for 2 hours at 40 ¡À 2 .After completion of the reaction, the material was cooled to 15 ¡À 5 rejection filter, and the filtrate was added to a solution of sodium chloride (338.0kg sodium chloride to 940.0kg purified water, and dissolved with stirring), the following -5 ~ 0 stirred for 4h, rejection was filtered, the filter cake was charged to an oven baking pan blast drying oven at a temperature of 40 ¡À 5 8 hours.To give 58.2kg of trityl olmesartan medoxomil, a yield of 96.5%.

The chemical industry reduces the impact on the environment during synthesis, 4-(Chloromethyl)-5-methyl-1,3-dioxol-2-one, , I believe this compound will play a more active role in future production and life.

Reference£º
Patent; Lianyungang Runzhong Pharmaceutical Co., Ltd.; Zhong Zhaobo; Cheng Jinrong; He Shaojie; Tang Zhaocheng; (6 pag.)CN110396084; (2019); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

144690-92-6, A common heterocyclic compound, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.”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

With the complex challenges of chemical substances, we look forward to future research findings about 144690-92-6,belong Dioxole compound

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

144690-92-6, A common heterocyclic compound, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.”144690-92-6

The reaction flask was charged with 400 g of compound VII (0.50 mol) and 70% aqueous acetic acid solution of 3200 ml, Reaction was carried out at 50 C for 2 hours. After the completion of the reaction, the solvent was concentrated and concentrated, and ammonia was added to the residue.PH = 7, extracted with 1400 ml of ethyl acetate, the ethyl acetate layer was washed with water, and finally with anhydrous sodium sulfateDried; filtered, the filtrate was concentrated to dryness and the residue was recrystallized from ethanol to give the compound I pure product 256.1G, yield: 91.79%.

With the synthetic route has been constantly updated, we look forward to future research findings about Triphenyl methyl olmesartan,belong Dioxole compound

Reference£º
Patent; Hunan Ouya biological Co. Ltd.; Lin, kaizhao; (19 pag.)CN103304550; (2016); B;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

144690-92-6, A common heterocyclic compound, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.”144690-92-6

A solution of MTT in 10 volumes of acetic acid (75%) was heated for 1.5 hrs at 60 C. until a pH of 2.21-2.23 was achieved, 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.)., 144690-92-6

With the rapid development of chemical substances, we look forward to future research findings about 144690-92-6

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

4-(Chloromethyl)-5-methyl-1,3-dioxol-2-one, A common heterocyclic compound, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.”80841-78-7

Example 3; Preparation of olmesartan medoxomilTo dimethyl acetamide (800 ml) was added 4-(1-hydroxy-1-methylethyl)-2-propyl imidazol- 5-carboxylic acid ethyl ester (100 gms) and powdered potassium carbonate (200 gms). To this was charged 4-[2-(trityltetrazol-5-yl)phenyl]benzyl bromide (300 gms) at 45-50C. The contents were stirred for 8-10 hours at 45-50C. The insolubles were filtered. The contents were cooled to 5-100C. Potassium tertiary butoxide (100 gms) was charged at a temperature below 45C. The reaction was maintained at 40-450C for 3 hrs. To this was slowly added 5-methyl-2-oxo-1 ,3-dioxane-4-yl) methyl chloride 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 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 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 was filtered to remove tritanol. The reaction mass was concentrated under reduced pressure. The residue was quenched with water (500 ml), neutralized with base and extracted in dichloromethane (500 ml).The clear dichloromethane extract was then concentrated under reduced pressure, stripped off with acetone. The residue thus obtained was isolated from the acetone (250 ml) to give 55 gms of the title compound. Chromatogrphic purity- > 99%

The chemical industry reduces the impact on the environment during synthesis, 4-(Chloromethyl)-5-methyl-1,3-dioxol-2-one, , I believe this compound will play a more active role in future production and life.

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

144690-92-6, A common heterocyclic compound, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.”144690-92-6

7.5 cm in diameterIn a 500 mL four-necked flask equipped with two stirring blades,40 g of trityl olmesartan medoxomil,180 ml of acetic acid,40 g (1.0 volume) of water was added,The mixture was stirred at 40 C. for 2 hours to carry out deprotection reaction (reaction conversion: 98.4%Olmesartan medoxomil purity: 98.95%,Olmesartan dimer: 0.047%).Then,The reaction solution was cooled to 20 C.,80 g of water was added,After stirring at 20 C. for 1 hour,The precipitated triphenylmethanol was removed by vacuum filtration,To the obtained filtrate, 240 ml of 10% sodium hydrogen carbonate was added,The liquidity of the aqueous layer was adjusted to pH 3.5,After adding 400 ml of ethyl acetate and vigorously stirring,The aqueous layer was separated,An organic layer containing olmesartan medoxomil was obtained (olmesartan medoxomil purity: 99.35%Dimer: 0.011%).200 ml of ethyl acetate was distilled off from the organic layer,After stirring at 20 to 30 C. for 1 hour,The precipitated solid was collected by filtration under reduced pressure as a wet body.The obtained wet body was dried at 40 C. for 14 hours,24 g of crystals of olmesartan medoxomil were obtained (yield: 86%, olmesartan medoxomil purity: 99.71%, dimer: 0.010%).

The chemical industry reduces the impact on the environment during synthesis, Triphenyl methyl olmesartan, , I believe this compound will play a more active role in future production and life.

Reference£º
Patent; Tokuyama Corporation; Mori, Hiroshi; Tanaka, Kenji; (12 pag.)JP6091339; (2017); B2;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem