Tag: M.W:100-200

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

Example 7; Preparation of Trityl Olmesartan Medoxomil4-(1-Hydroxy-1-methylethyl)-2-propyl-1-{4-[2-(trityltetrazol-5-yl)phenyl]phenyl}methylimidazole-5-carboxylic acid dehydrate (100 g) was suspended in acetone (1 L) & heated to reflux; the solution obtained was added to suspension of potassium carbonate (15 g), potassium iodide (6 g) & 4-chloromethyl-5-methyl-1,3-dioxol-2-one (35 g) in acetone (500 mL) at reflux temperature. Reaction mass was refluxed for 2-6 hrs. After competition of reaction, the reaction mass was filtered & the acetone was distilled from combined mother liquor. The residue obtained was dissolved in toluene (1 L) toluene layer was washed with brine (3¡Á250 mL). Toluene was removed under reduced pressure & residue thus obtained was recrystallized from methanol to give trityl OlmesartanMedoxomil (100 g).HPLC purity=99.5%

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; Ramanjaneyulu, Gorantla Seeta; Mohan, Bandari; Ray, Purna Chandra; Sethi, Madhuresh Kumar; Rawat, Vijendra Singh; Krishna, Yerramalla Raja; Lakshminarayana, Vemula; Srinivas, Mamidi; US2009/281327; (2009); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

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., 37830-90-3

To a stirred solution of 4, 5-dimethyl-l, 3-dioxol-2-one (4.5 g, 39.4 mmol) in benzene (150 mL), were added NBS (15.44 g, 87 mmol) and AIBN (0.648 g, 3.94 mmol). The reaction mixture was stirred at 1 10 C for 2 h under nitrogen atmosphere and subsequently concentrated in vacuo. The residue was dissolved in ethyl acetate (200 mL). The solution was washed with water (2* 150 mL) and brine (100 mL), dried over anhydrous sodium sulphate and concentrated in vacuo to get the crude product as a light brownish oil, which was purified by CombiFlash chromatography (60-120 silica gel; 5- 55% ethyl acetate in pet. ether as eluent) to afford 4,5 -bis (bromomethyl)-l,3-dioxol-2- one (7 g, 66%) as a light yellowish oil. NMR (400 MHz, Chloroform-7) d ppm 4.22 (s, 4H).

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; BRISTOL-MYERS SQUIBB COMPANY; BALOG, James Aaron; SEITZ, Steven P.; WILLIAMS, David K.; ANDAPPAN MURUGAIAH SUBBAIAH, Murugaiah; (191 pag.)WO2019/136112; (2019); A1;,
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. 80841-78-7, introduce a new downstream synthesis route. 80841-78-7

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%).

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; KRKA; US2009/131680; (2009); A1;,
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

REFERENCE EXAMPLE 2 Preparation of 4-chloromethyl-5-methyl-1,3-dioxolene-2-one (II) To a solution of 75 g of 4,5-dimethyl-1,3-dioxolene-2-one (IV) in 750 ml of methylene chloride was added 97.6 g of sulfuryl chloride dropwise at 40¡ã-42¡ã C. over 2 hours. The mixture was stirred for 40 minutes at the same temperature and evaporated in vacuo to remove the solvent. NMR spectrometry of the resulting oil revealed that the product was 4-chloro-4-methyl-5-methylene-1,3-dioxolane-2-one (III) containing a trace amount of unreacted 4,5-dimethyl-1,3-dioxolene-2-one (IV). This oil was heated at 90¡ã C. with stirring for 2 hours without isolating 4-chloro-4-methyl-5-methylene-1,3-dioxolane-2-one (III) and then distilled in vacuo. 75.4 g (corresponding to an overall yield from 4,5-dimethyl-1,3-dioxolene-2-one (IV) of 77percent) of 4-chloromethyl-5-methyl-1,3-dioxolene-2-one (II) having the physicochemical properties described in Reference Example 1 was obtained.

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; Kanebo, Ltd.; US4554358; (1985); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.37830-90-3, molecula formula is 4,5-Dimethyl-1,3-dioxol-2-one, below Introduce a new synthetic route., 37830-90-3

[01658] A solution of 4,5-dimethyl-2-oxo-1,3-dioxolene (1 mmole) and selenium dioxide (2.5 mmole) 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: RPf=0.5, 5percent MeOH-dichloromethane. [01659] A solution of 5-methyl-4-hydroxymethyl-2-oxo-1,3-dioxolene (1 mmole) in DMF was treated with tert-butyldimethylsilane (1.2 mmole) and imidazole (2.2 mmole) at 25 C. for 24 h. Extraction and chromatography gave 5-methyl-4-tert-butyldimethylsilyloxymethyl-2-oxo-1,3-dioxolene. [01660] A solution of 5-methyl-4-tert-butyldimethylsilyloxymethyl-2-oxo-1,3-dioxolene (1 mmole) and Lawesson’s reagent (1.2 mmole) in toluene was heated to 120 C. for 12 h. Extraction and chromatography gave 5-methyl-4-tert-butyldimethylsilyloxymethyl-2-thio-1,3-dioxolene. [01661] A solution of 5-methyl-4-tert-butyldimethylsilyloxymethyl-2-thio-1,3-dioxolene in methanolic hydrogen chloride was stirred at 0 C. for 1 h and 25 C. for 12 h. Extraction and chromatography gave 5-methyl-4-hydroxymethyl-2-thio-1,3-dioxolene.

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

Reference£º
Patent; Metabasis Therapeutics, Inc.; US6756360; (2004); B1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

We know that the rate of many reactions can be accelerated by catalysts. A catalyst speeds up the rate of a reaction by lowering the activation energy; in addition, the catalyst is regenerated in the process. 37830-90-3, molecula formula is C5H6O3, below Introduce a new synthetic route., 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

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.37830-90-3, molecula formula is 4,5-Dimethyl-1,3-dioxol-2-one, below Introduce a new synthetic route., 37830-90-3

Example 1The feeding substance than the molar amount of the: DMDO: sulfonyl chloride to 1 : 1.3. The organic solvent is dichloromethane, the quality of the organic solvent with DMDO volume ratio is 1:7. Solid free radical scavenging agent is methyl hydroquinone, DMDO the quality of the amount of 1percent.To is provided with a magnetic stirring, constant pressure dropping funnel, reflux condensation tube, thermometer and is provided with a tail gas absorption device 500 ml flask to three in 350 ml dichloromethane, 50gDMDO, under stirring backflow state, slowly dropping 77g sulfonyl chloride, dropping time is approximately 2.5h, heat preservation after dropping 2h, rotary evaporation to remove the solvent. Furthermore, added to the bottoms of 0.5g methyl hydroquinone, for 90 ¡ãC conditions, stirring rearrangement 5h, obtaining a reaction crude. Analysis of the purity of crude 92.33percent, the crude in 2mmHg the vacuum degree of the vacuum distillation, to obtain the target product 52.8g, to yield 81.1percent, purity of 97.87percent.

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; Six Anke Rui Da New Materials Co.,Ltd.; Bao, Yuanzhi; Weng, Shibing; Zhao, Zhongyao; (6 pag.)CN105348249; (2016); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.37830-90-3, molecula formula is 4,5-Dimethyl-1,3-dioxol-2-one, below Introduce a new synthetic route., 37830-90-3

Example 1The feeding substance than the molar amount of the: DMDO: sulfonyl chloride to 1 : 1.3. The organic solvent is dichloromethane, the quality of the organic solvent with DMDO volume ratio is 1:7. Solid free radical scavenging agent is methyl hydroquinone, DMDO the quality of the amount of 1percent.To is provided with a magnetic stirring, constant pressure dropping funnel, reflux condensation tube, thermometer and is provided with a tail gas absorption device 500 ml flask to three in 350 ml dichloromethane, 50gDMDO, under stirring backflow state, slowly dropping 77g sulfonyl chloride, dropping time is approximately 2.5h, heat preservation after dropping 2h, rotary evaporation to remove the solvent. Furthermore, added to the bottoms of 0.5g methyl hydroquinone, for 90 ¡ãC conditions, stirring rearrangement 5h, obtaining a reaction crude. Analysis of the purity of crude 92.33percent, the crude in 2mmHg the vacuum degree of the vacuum distillation, to obtain the target product 52.8g, to yield 81.1percent, purity of 97.87percent.

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

Reference£º
Patent; Six Anke Rui Da New Materials Co.,Ltd.; Bao, Yuanzhi; Weng, Shibing; Zhao, Zhongyao; (6 pag.)CN105348249; (2016); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

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

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., 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

There are, however, a few established termolecular elementary reactions. The reaction of nitric oxide with oxygen appears to involve termolecular steps.

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