Category: 37830-90-3

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.

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

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

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 IR spectrum showed an absorption at 5.49 microns.

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; Pfizer Inc.; US4434173; (1984); 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 IR spectrum showed an absorption at 5.49 microns.

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; Pfizer Inc.; US4434173; (1984); 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.

(1) 4-Bromomethyl-5-methyl-1,3-dioxolen-2-one [compound of formula (III) in which R is methyl and X is bromine] 3.42 g of 4,5-dimethyl-1,3-dioxolen-2-one [compound of formula (III’) in which R is methyl, prepared in accordance with the procedure described in Tetrahedron Letters, pages 1701-1704, (1972)] was dissolved in 150 ml of carbon tetrachloride. To the solution were added 5.34 g of N-bromosuccinimide and a catalytic amount of alpha,alpha’-azobisisobutyronitrile. The mixture was heated under reflux for 15 minutes. The reaction mixture was cooled with ice, and the insoluble materials were removed by filtration. The filtrate was concentrated under reduced pressure to give a syrupy residue. The residue was distilled under reduced pressure, and a fraction having a boiling point of 115¡ã to 120¡ã C./5 mmHg was recovered. Thus, 4.2 g (yield 73percent) of the captioned compound having the following properties was obtained as a colorless liquid. Elemental analysis for C5 H5 BrO3: IR (neat) nu(cm-1): near 18 25 (carbonyl). NMR (CCl4) delta(ppm): 2.10 (3H, –CH3, s), 4.10 (2H, –CH2 Br, s).

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

Reference£º
Patent; Kanebo Ltd.; US4448769; (1984); A;,
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.

To a solution of 16 grams 4,5-dimethyl-1, 3-dioxol-2-one in CC14 (250 mE) was added N135 (23.4 g,131.5 mmol) and AII3N (1.3 g, 7.88 mmol), then the reaction mixture was heated to 80¡ã C. and stirred for 2 hrs. Monitored the starting material gone by TLC. The mixture was filtered and the filtrate was washed with water and brine, the organic phase was dried over Na2504 and concentrated to give crude product as a yellow oil which was used directly next step (25.3 g, yield 93percent).

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

Reference£º
Patent; KULING THERAPEUTICS; DING, Qiang; Wang, Xiaohu; (55 pag.)US2017/298090; (2017); A1;,
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

[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

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

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

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

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.

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).

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

Reference£º
Patent; RIGEL PHARMACEUTICALS, INC.; WO2005/97760; (2005); A1;,
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

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