Dioxole related

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

Toluene (180 L) is placed into a reactor and water (3.17 L) is added, followed by addition of ethyl-4-(1 -hydroxy-1 -methylethyl)-2-propylimidazole-5- carboxylate (18.0 Kg). The mass is stirred for about 10 minutes, heated to about 45C, and potassium carbonate (25.85 Kg) is added. The temperature of the mass is raised to about 65C and maintained for about 45 minutes. N-(triphenylmethyl)- 5-[4′-(bromomethyl)biphenyl-2-yl]tetrazole (48.9 Kg) and tetrabutylammonium bromide (4.82 Kg) are added at the same temperature and the mixture is stirred at 60-700C for 10 hours. Reaction completion is verified using thin layerchromatography (TLC). After the reaction is complete, the mass is washed with water (3*120 L) at about 500C. The mass is cooled to about 25C and toluene (468 L) and potassium tertiary-butoxide (12.6 Kg) is added, then the mass is maintained at the same temperature for about 1 hour. Water (0.85 L) is added and the mass is maintained at the same temperature for about 2 hours. Reaction completion is verified using TLC, then 5-methyl-2-oxo-(1 ,3-dioxolene-4-yl)methyl chloride (20 Kg), tetrabutylammonium bromide (4.82 Kg), and sodium carbonate (3.96 Kg) are added at 40-450C. The mass is stirred at about 55C for about 11 hours. After the reaction is complete, the mass is cooled to about 20C, water (540 L) is added and the pH is adjusted to about 6-7 by adding 10% aqueous HCI. The layers are separated. The aqueous layer is extracted with toluene (240 L). The organic layers are combined and washed with water (270 L). The solvent is distilled under reduced pressure. Acetone (189 L) is added to the residue and the mixture is heated to about 45C to produce a solution, then the solution is cooled to about 300C and maintained for about 20 minutes, followed by cooling to about 2C and maintaining for about 3 hours. The formed solid is filtered, washed with acetone (54 L), and dried for about 4 hours. The material obtained is re- crystallized from acetonitrile to yield 34.0 Kg of the title compound.

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

Reference£º
Patent; DR. REDDY’S LABORATORIES LTD.; DR. REDDY’S LABORATORIES, INC.; KOLLA, Naveen Kumar; MANNE, Nagaraju; NAREDLA, Anitha; SHINDE, Sachin Gulabrao; WO2011/14611; (2011); A2;,
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

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

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

Reference£º
Patent; ANCHEN LABORATORIES, INC; WO2009/118580; (2009); A2;,
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.37830-90-3. A new synthetic method of this compound is introduced below., 37830-90-3

EXAMPLE 1 Preparation of 4-chloro-4-methyl-5-methylene-1,3-dioxolane-2-one (III) To a solution of 50 g of 4,5-dimethyl-1,3-dioxolene-2-one (IV)(Synthesised by the method described in Tetrahedron Letters, 1701-1704 (1972)) in 350 ml of methylene chloride was added 65 g of sulfuryl chloride dropwise over 1 hour at 40¡ã-42¡ã C. The mixture was stirred for one hour at the same temperature and then evaporated in vacuo to remove the solvent. The resulting residue was distilled in vacuo to obtain 42.1 g (65percent of theory) of 4-chloro-4-methyl-5-methylene-1,3-dioxolane-2-one (III) as a colorless oil. B.p. 45¡ã-48¡ã C./2 mmHg. IR(CHCl3)nu(cm-1): 1820, near 1695 etc. NMR(CDCl3, delta(ppm)): 2.19(3H, s, CH3), STR5

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; Kanebo, Ltd.; US4554358; (1985); A;,
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. 80841-78-7, molecula formula is C5H5ClO3, below Introduce a new synthetic route., 80841-78-7

(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

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

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

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

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

An elementary termolecular reaction involves the simultaneous collision of three atoms, molecules, or ions.Triphenyl methyl olmesartan, cas is 144690-92-6. Here is a downstream synthesis route of the compound 144690-92-6, 144690-92-6

Example 4; Olmesartan medoxomil (V); The starting substance (III; 10 g) was dissolved in acetone (50 ml), and, after adding water (25 g), the mixture was heated to a mild boil for 14 h. After evaporating acetone and adding ethyl acetate (50 ml), water was separated, and the organic layer was again washed with water (10 ml). The extract was concentrated and evaporated with toluene (50 ml) once more, the residue was dissolved in ethyl acetate (20 ml) and toluene (20 ml). The mixture was concentrated to 25 ml and allowed to crystallize under stirring for 30 min; after cooling to 15 C, the insoluble portion was sucked off and washed with ethyl acetate. 6.5 g of the product was obtained, which, after recrystallization from ethanol, gave 6 g (86 %) of the product with an HPLC purity of 98.7 %.By further recrystallization from ethyl acetate and cyclohexane, 5.1 g of a sample with an HPLC purity of 99.6 % was obtained. 1H NMR (250 MHz, CDCl3) delta: 0.82 (3H, t, J = 7.5 Hz); 1.50 (6H, s); 1.54-1.63 (2H, m); 2.07 (3H, s); 2.48 (2H, t, J = 7.5 Hz); 4.86 (2H, s); 5.32 (2H, s); 6.70 (2H, d, J = 8 Hz); 6.99 (2H, d, J = 8 Hz); 7.3-7.5 (3H, m); 7.72 (IH, dd, J = 1.7 Hz).

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

Reference£º
Patent; ZENTIVA, A.S.; WO2007/48361; (2007); A1;,
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 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%

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

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

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.

To BIC (110 g, 1 eq) was added acetone (385 mL, 3.5 vol) at 25C – 30C, and the mixture was dissolved by stirring for 5 min. Sodium carbonate (20.85 g, 1.3 eq) and potassium iodide (0.25 g, 0.01) were added, and the mixture was stirred for 10 min. A solution of 4-chloromethyl-5-methyl-2-oxo-1,3-dioxolene (31.456 g, 1.4 eq) in acetone (165 mL, 1.5 vol) was added thereto. The reaction mixture was heated to 45C – 50C, and stirred at the same temperature for 12 hr. Using TLC (thin layer chromatography) (TLC eluent: 10% methanol/methylene chloride, detection method: UV), complete disappearance of BIC was confirmed. The reaction mixture was cooled to 25C – 30C. Then, the solvent contained in the reaction mixture was evaporated under reduced pressure at 40C – 45C. To the obtained residue were added 10% brine (550 mL, 5 vol) and toluene (550 mL, 5 vol). Furthermore, the mixture was adjusted to pH 7 – 8 by adding 5% hydrochloric acid (33 mL), stirred for 10 min, left standing for 5 min and partitioned. The aqueous layer was extracted with toluene (2×330 mL, 2×3 vol). The extracts were combined with the organic layer, 10% brine (550 mL, 5 vol) was added, and the mixture was stirred for 5 min, left standing for 45 min, partitioned, and concentrated under reduced pressure at 40C – 45C to give TOLM (110 g, 90%). [0306] To the obtained TOLM was added acetone (110 mL, 1 vol), and the mixture was stirred at 25C – 30C for 30 min. n-Heptane (440 mL, 4 vol) was added, and the mixture was cooled to 5C – 10C and stirred at 5C – 10C for 30 min, whereby precipitation of a solid was confirmed. The solid (80 g, 66%) was collected by filtration, and blast dried. To the obtained solid was added isopropyl alcohol (400 mL, 5 vol), and the mixture was heated to 50C – 55C and stirred at 50C – 55C for 1 hr. Then, the mixture was cooled to 25C – 30C, and stirred at 25C – 30C for 1 hr. The resulting solid was filtered and suction-filtered for 10 min to give TOLM (76 g, 62%).

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

Reference£º
Patent; API Corporation; SEKI, Masahiko; EP2891650; (2015); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

144690-92-6, 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.144690-92-6. An updated downstream synthesis route of 144690-92-6 as follows.

Example 2; 36.0 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 0C 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 50C 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 2x 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 24-26C for 3h. 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 1h, filtered off and washed with 20 ml of fresh ethyl acetate. The yield of the product (I) was 21 g (75 %)., 144690-92-6

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

Reference£º
Patent; KRKA, tovarna zdravil, d.d., Novo mesto; EP1816131; (2007); A1;,
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. 80841-78-7, molecula formula is C5H5ClO3, below Introduce a new synthetic route., 80841-78-7

Step B, go to the reaction solution of compound (II) obtained in Step A with stirring,Add 6.27kg of anhydrous sodium carbonate powder and 2.01kg of iodine, replace the air with nitrogen,The nitrogen pressure in the kettle is ?0.01Mpa, the control temperature is 50 ¡À 2 ,15.05 kg of compound (IV) was added dropwise at a constant pressure, and the addition was completed within 40 to 60 minutes.After the reaction was held for 1 hour, the reaction mixture was reduced to below 10 C.Extract with conventional solvents in an extraction kettle, wash with water, and separate the layers.The organic phase was distilled under reduced pressure to recover the solvent, crystallized, centrifuged,After drying, 54.88 kg of the crude compound (I) was obtained.Step C: Add 192.08 kg of ethyl acetate to the 500L refining kettle, start stirring,Add 54.88 kg of crude compound (I) obtained in step B, close the feed port,Keep the pressure ?0.01MPa after replacing air with nitrogen,The temperature was raised to 75 C and dissolved for 25 minutes until it was clear. The filtrate was filtered and the temperature was reduced to 2.5 C.Centrifuge, put the filter cake into the double cone dryer,Under reduced pressure, a small flow of nitrogen was passed in for replacement three times, and the drying temperature was controlled to 40-50 C.Vacuum degree ?-0.09MPa, after drying for 1 hour,Increase the drying temperature to 50 60 and continue drying for 3 hours.After cooling down, 53.60 kg of compound (1) was obtained, and the HPLC content was 99.87%.Compound (III) had a residual content of 0.06%.

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; Shandong Xinhua Pharmaceutical Co., Ltd.; Zhu Lianbo; Wu Hui; Dou Guohua; (6 pag.)CN110590758; (2019); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem