Tag: M.W:100-200

An elementary termolecular reaction involves the simultaneous collision of three atoms, molecules, or ions.4-(Chloromethyl)-5-methyl-1,3-dioxol-2-one, cas is 80841-78-7. Here is a downstream synthesis route of the compound 80841-78-7, 80841-78-7

Example 1(1) Tritylation and DMDO Esterification ReactionsAfter mixing 4-(1-hydroxy-1-methylethyl)-2-propyl-1-[[2′-[1H-tetrazol-5-yl]biphenyl-4-yl]methyl]imidazole-5-carboxylic acid (30 g), acetone (210 mL), 1,8-diazabicyclo[5,4,0]-7-undecene [DBU] (25.5 g) and triphenylmethyl chloride [TPC] (23.79 g), water (0.6 mL) was added and acetone (30 mL) was poured into the mixture, and the reaction mixture was stirred at 48 to 52 C. for 2 hours. Then, water (0.9 mL) was added and 4-chloromethyl-5-methyl-1,3-dioxol-2-one [DMDO-Cl] (18.5 g) was poured in, and the reaction mixture was stirred at 48 to 52 C. for 5 hours.(2) Obtaining Crude Crystals of Trityl Olmesartan Medoxomil (Acetone Solvate Crystals)After the reaction mixture was cooled to 20 C. to precipitate crystals, it was stirred at 15 to 25 C. for 40 minutes, and water (96 mL) was added dropwise over a period of 25 minutes, and then the reaction mixture was cooled to 0 to 5 C. and stirred for 30 minutes. The precipitated crystals were filtered out and washed with acetone-water (150 mL), and wet crude crystals of (5-methyl-2-oxo-1,3-dioxolen-4-yl)methyl 4-(1-hydroxy-1-methylethyl)-2-propyl-1-[[2′-[2-(triphenylmethyl)-2H-tetrazol-5-yl]biphenyl-4-yl]methyl]imidazole-5-carboxylate (57.83 g) were obtained. These were then dried in vacuo at 60 C. for approximately 15 hours, and the dry acetone solvate crystals (57.50 g) were obtained.

Elementary reactions that involve the simultaneous collision of more than three molecules are highly improbable and have never been observed experimentally.

Reference£º
Patent; DAIICHI SANKYO COMPANY, LIMITED; US2012/59172; (2012); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

The molecularity is the number of molecules that collide during that step in the mechanism. If only a single reactant molecule in an elementary reaction, that step is designated as unimolecular; if there are two reactant molecules, it is bimolecular.80841-78-7. A new synthetic method of this compound is introduced below., 80841-78-7

10L autoclave, 520g (0.75mol) Compound 5, DMF3kg, potassium carbonate and 215.3g (1.6mol), stirred at room temperature 1.5-2.5h added to the system after 63.0g (0.38mol) of potassium iodide was added dropwise while – Chloromethyl -5-methyl-1,3-dioxol-2-one 40.0g (0.94mol). Dropping was completed, the reaction at room temperature after 3-4h TLC or HPLC in control, raw reaction was complete. To the system was added ethyl acetate and 3L 3L water and 200g of sodium chloride, stirring separated and the aqueous layer was washed with 3X1L ethyl acetate, the combined organic layers, the organic layer was dried, filtered and the solvent was evaporated cooling is added 0-10 , methanol was added 1600g beating 30min, filtered, then the filter cake was slurried at room temperature in acetonitrile 1600g 30min, filtered to afford intermediate 6 about 553.8g,

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; Jiangsu Bang Pharmaceutical Co., Ltd.; Zhao, Guangrong; Huan, Shuang; Zhao, Huayang; Liu, Liping; Chen, Guoping; Tang, Jingyu; (19 pag.)CN105481842; (2016); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

One of the major reasons is to use measurements of the macroscopic properties of a system, the rate of change in the concentration of reactants or products with time, to discover the sequence of events that occur at the molecular level. 37830-90-3, introduce a new downstream synthesis route. 37830-90-3

PREPARATION 1 4-Bromomethyl-5-methyl-2-oxo-1,3-dioxole To a stirred solution of 3.0 g of 4,5-dimethyl-2-oxo-1,3-dioxole in 100 ml of carbon tetrachloride was added 4.63 g of N-bromosuccinimide. The resulting solution was heated under reflux and irradiated for 15 minutes. The reaction mixture was cooled to 0¡ã-5¡ã C., filtered and evaporated to give the title product. The NMR spectrum (CDCl3) showed absorptions at 2.05 (5percent of starting material), 2.18 (3H, s), 4.30 (2H, s) and 4.35 (5percent of dibromo compound) ppm downfield from tetramethylsilane. The infrared spectrum showed an absorption at 5.49 microns., 37830-90-3

This molecular description is the mechanism of the reaction; it describes how individual atoms, ions, or molecules interact to form particular products. The stepwise changes are collectively called the reaction mechanism.

Reference£º
Patent; Pfizer Inc.; US4448732; (1984); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

80841-78-7, A balanced equation for a chemical reaction indicates what is reacting and what is produced, but it reveals nothing about how the reaction actually takes place. The reaction mechanism is the process, or pathway, by which a reaction occurs.80841-78-7. An updated downstream synthesis route of 80841-78-7 as follows.

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

37830-90-3, The molecularity is the number of molecules that collide during that step in the mechanism. If only a single reactant molecule in an elementary reaction, that step is designated as unimolecular; if there are two reactant molecules, it is bimolecular.37830-90-3. A new synthetic method of this compound is introduced below.

Compound 20 was prepared following the steps disclosed in the literature (Sakamoto er a/., Chem. Pharm. Bull, 1984, 32, 2241).

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; ANCHEN LABORATORIES, INC; WO2009/118580; (2009); A2;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

37830-90-3, A balanced equation for a chemical reaction indicates what is reacting and what is produced, but it reveals nothing about how the reaction actually takes place. The reaction mechanism is the process, or pathway, by which a reaction occurs.37830-90-3. An updated downstream synthesis route of 37830-90-3 as follows.

PREPARATION 2 Preparation of 4-bromomethyl-5-methyl-1,3-dioxole-2-one According to the method described in Liebigs. Ann. Chem., 1977, 27-32 4,5-dimethyl-1,3-dioxole-2-one (500 mg, 4.38 mmol) and N-bromosuccinimide (0.78 g, 4.38 mmol) were heated under reflux in dry carbon tetrachloride in the presence of alpha-alpha’-azobisisobutyronitrile (7.5 mg) for 20 minutes. The reaction mixture was concentrated under reduced pressure to half the volume, and the precipitated solid was filtered by suction. After removing the solvent from the filtrate, the residue was analyzed by gas chromatography. The obtained mixture (792 mg), contained 70percent of the desired title compound and used for the subsequent reactions.

A chemical reaction often occurs in steps, although it may not always be obvious to an observer.

Reference£º
Patent; Sawai Pharmaceutical Co., Ltd.; US5006548; (1991); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

80841-78-7, The molecularity is the number of molecules that collide during that step in the mechanism. If only a single reactant molecule in an elementary reaction, that step is designated as unimolecular; if there are two reactant molecules, it is bimolecular.80841-78-7. A new synthetic method of this compound is introduced below.

(3) the C43 H39 N6 NaO3 AMST – 4 and DMF added in a reaction kettle, lowering the temperature to 0 C, adding potassium carbonate, maintain 0 C dropwise C5 H5 ClO3 AMST – 5 dissolved in DMF solution, after the completion of the dropping 85 C reaction 4 hours, monitoring the reaction is finished adding water, sodium chloride and ethyl acetate stirring extraction, liquid, separating the upper organic phase, a mixed solution of water and sodium chloride washing, separating the organic phase at upper layer for sodium sulfate drying, filtering, 60 C concentrated to the reagent, in acetonitrile for 30 C beating 1 hour, cooling to 25 C, filtering, cake isopropyl alcohol leaching, 75 C drying to constant weight to obtain the product C48 H44 N6 O6 AMST – 6; the C43 H39 N6 NaO3 AMST – 4, DMF, potassium carbonate, C5 H5 ClO3 AMST – 5, ethyl acetate, acetonitrile, water, sodium chloride and sodium sulfate the mass ratio of the 192:560: 62:1500: 1000:1500: 300:50;

With the complex challenges of chemical substances, we look forward to future research findings about 4-(Chloromethyl)-5-methyl-1,3-dioxol-2-one

Reference£º
Patent; Jiangxi Yong Tong Technology Co., Ltd.; Liu Zhongchun; (10 pag.)CN107311989; (2017); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

An elementary termolecular reaction involves the simultaneous collision of three atoms, molecules, or ions.4,5-Dimethyl-1,3-dioxol-2-one, cas is 37830-90-3. Here is a downstream synthesis route of the compound 37830-90-3, 37830-90-3

37830-90-3, To a solution of 4,5-dimethyl-1,3-dioxolene-2-one (TCI, 10 g, 88 mmol) and N- bromosuccinimide (Fluka, 15.69 g, 88 mmol) in carbon tetrachloride (250 mL) was added benzoyl peroxide (Acros, 500 mg, 2.1 mmol). The reaction mixture was then refluxed for 2.5 h after which time the volatiles were evaporated under vacuum. The resulting residue was triturated with some carbon tetrachloride, filtered and the solid cake was washed with carbon tetrachloride. The filtrate volatiles were removed under vacuum and the yellow oily residue was distilled under vacuum (2-5 torr) to give 4-bromomethyl-5-methyl-1,3-dioxolene-2-one 903 (8.35 g, b.p. 94-98 ¡ãC, 49percent) as a pale yellow oil. 1H NMR (CDCI3) 8 4.21 (s, 2H), 2.17 (s, 3H).

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; RIGEL PHARMACEUTICALS, INC.; WO2005/97760; (2005); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

37830-90-3, The molecularity is the number of molecules that collide during that step in the mechanism. If only a single reactant molecule in an elementary reaction, that step is designated as unimolecular; if there are two reactant molecules, it is bimolecular.37830-90-3. A new synthetic method of this compound is introduced below.

Example 26 Preparation of 5-methyl-4-hydroxymethyl-2-oxo-1,3-dioxolene A mixture of 4,5-dimethyl-2-oxo-1,3-dioxolene (1 mmol) and selenium dioxide (2.5 mmol) in dioxane was heated at reflux for 1 h. Evaporation, extraction and chromatography gave 5-methyl-4-hydroxymethyl-2-oxo-1,3-dioxolene as a yellow oil. TLC: Rf=0.5, 5percent MeOH-dichloromethane.

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; Metabasis Therapeutics, Inc.; US6054587; (2000); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

80841-78-7, A balanced equation for a chemical reaction indicates what is reacting and what is produced, but it reveals nothing about how the reaction actually takes place. The reaction mechanism is the process, or pathway, by which a reaction occurs.80841-78-7. An updated downstream synthesis route of 80841-78-7 as follows.

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

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; 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