Author: Jessica.F

400727-63-1, name is tert-Butyl 5-nitroisoindoline-2-carboxylate, belongs to indolines-derivatives compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. HPLC of Formula: C13H16N2O4

To a solution of tert-butyl 5-nitroisoindoline-2-carboxylate (1.4) (3.8 g, 14.4 mmol) in MeOH (50 mL) was added 10% Pd/C (380 mg). The suspension was degassed under vacuum and purged with H2 several times. The mixture was stirred under H2 balloon at 50 C overnight. TLC showed the reaction was complete. The suspension was filtered through celite, which was washed three times with MeOH. The combined filtrate was concentrated and the residue was purified by column chromatography (eluted 50% EtOAc in hexanes) to afford tert-butyl 5- aminoisoindoline-2-carboxylate (1.5) (3.1 g, 92.2 %). [00327] LCMS: 235.3[M+1]+.

The synthetic route of 400727-63-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; CELGENE AVILOMICS RESEARCH, INC.; SCHWARTZ, C., Eric; SURAPANENI, Sekhar, S.; WORM, Karin Irmgard; (266 pag.)WO2016/90079; (2016); A1;,
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Some common heterocyclic compound, 20870-79-5, name is 5-Nitroindolin-2-one, molecular formula is C8H6N2O3, 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. category: indolines-derivatives

To a suspension of 5-nitroindolin-2-one (2) (4 g, 22.5 mmol) in MeOH (200 mL) was added 10% Pd/C (0.2 g) under H2, and the mixture was stirred at 25 C for 24 h. Then the reaction mixture was filtered, and the filtrate was concentrated to give 4.5 g as a white solid. 1H NMR (400 MHz, DMSO-d6) delta: 9.90 (s, 1H), 6.51 (d, J = 2.0 Hz, 1H), 6.50 (d, J = 8.1 Hz, 1H), 6.38 (dd, J = 8.2, 2.2 Hz, 1H), 4.68 (s, 2H), 3.31 (s, 2H). 13C NMR (100 MHz, DMSO-d6) delta: 176.2, 143.6, 134.0, 126.9, 112.8, 112.0, 109.7, 36.5.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 20870-79-5, its application will become more common.

Reference:
Article; Han, Weina; Huang, Jian; Jiang, Jin; Ruhan, A.; Wang, Jinhui; Yao, Dahong; Bioorganic and medicinal chemistry letters; vol. 30; 17; (2020);,
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In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 3335-98-6 as follows. Quality Control of 1-Phenyloxindole

General procedure: A mixture of isatins (1, 1.0 mmol), indolin-2-ones (2, 1.0 mmol) and ZrCl4 (23 mg, 0.1 mmol) was heated in anhydrous ethanol (5 mL) under reflux. After the disappearance of the reactants (8-12 h, monitored by TLC), the mixture was slowly cooled to room temperature. The red solids precipitated and were collected by filtration, then washed by a small amount of anhydrous ethanol to deliver pure compounds 3.

According to the analysis of related databases, 3335-98-6, the application of this compound in the production field has become more and more popular.

Reference:
Article; Liu, Meilin; Qiu, Shaozhong; Ye, Yu; Yin, Guodong; Tetrahedron Letters; vol. 57; 52; (2016); p. 5856 – 5858;,
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In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 1074-82-4 as follows. Safety of Potassium 1,3-dioxoisoindolin-2-ide

General procedure: To a solution of potassium 1,3-dioxoisoindolin-2-ide (1.85 g, 10.0 mmol), potassium iodide (0.08 g, 0.5 mmol) in acetone (25.0 mL), 1,2-dibromoethane dissolved in acetone (5.0 mL) was added by dropping funnel (3.72 g, 20.0 mmol), refluxed for 10 h. Monitored by TLC, and then filtered, concentrated by vacuum. The crude compound was purified by column chromatography on silica gel to give the desired intermediate 4 2-(2-bromoethyl) isoindoline-1,3-dione (1.83 g, 72.5% yield) as a white solid.

According to the analysis of related databases, 1074-82-4, the application of this compound in the production field has become more and more popular.

Reference:
Article; Xie, Ruliang; Mei, Xiangdong; Ning, Jun; Chemical and Pharmaceutical Bulletin; vol. 67; 4; (2019); p. 345 – 350;,
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Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 17630-75-0, name is 5-Chloro-2-oxindole, A new synthetic method of this compound is introduced below., Recommanded Product: 17630-75-0

General procedure: An oven-dried flask was charged with stir bar, oxindole (0.5 mmol), PIDA (0.25 mmol) in dry acetonitrile (4.0 mL). Then to the reaction mixture TEMPO (0.5 mmol) was added in presence of air and the mixture was stirred at room temperature until complete conversion takes place as indicated by TLC analysis. The resulting reaction mixture was extracted with ethyl acetate (3 10 mL). The combined organics were dried with Na2SO4 and dried under vacuum to afford crude solid. Then the crude product was purified by column chromatography on silica gel.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Article; Sai Prathima, Parvathaneni; Bikshapathi, Raktani; Rao, Vaidya Jayathirtha; Tetrahedron Letters; vol. 56; 46; (2015); p. 6385 – 6388;,
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Related Products of 129487-92-9, A common heterocyclic compound, 129487-92-9, name is tert-Butyl 5-aminoindoline-1-carboxylate, molecular formula is C13H18N2O2, 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.

Compound 5-aminodihydroindole-1-carboxylic acid tert-butyl ester (200 mg, 0.77 mmol) and 4,6-dichloropyridazine-3-carboxylic acid methyl ester 1a (200 mg, 0.97 mmol) were dissolved in ethanol ( 10mL),It was then heated to 90 C in a sealed tube and stirred for 12 hours.After cooling to room temperature, the solvent was removed under reduced pressure, and the residue was purified by silica gel column chromatography (petroleum ether / ethyl acetate = 1/1).The target product 5-((6-chloro-3- (methoxycarbonyl) pyridazin-4-yl) amino) dihydroindole-1-carboxylic acid tert-butyl ester 35a (200 mg, white solid) was obtained,Yield: 58%.

The synthetic route of 129487-92-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Beijing Nuochengjianhua Pharmaceutical Technology Co., Ltd.; Chen Xiangyang; Pang Yucheng; (142 pag.)CN110818641; (2020); A;,
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Some common heterocyclic compound, 20870-79-5, name is 5-Nitroindolin-2-one, molecular formula is C8H6N2O3, 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. Quality Control of 5-Nitroindolin-2-one

356 mg of 5-nitro-1,3-dihydro-indol-2-one is hydrogenated in 30 ml of tetrahydrofuran_ethanol=1:1 with 400 mg palladium on carbon (10%) at room temperature and normal pressure for 1 hour. After catalyst is suctioned off on diatomaceous earth and after concentration by evaporation, 320 mg (100% of theory) of 5-amino-1,3-dihydro-indol-2-one is obtained.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 20870-79-5, its application will become more common.

Reference:
Patent; Schering AG; US2004/39019; (2004); A1;,
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These common heterocyclic compound, 101207-45-8, name is 2-(4-Methylbenzyl)isoindoline-1,3-dione, 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. COA of Formula: C16H13NO2

Synthesis intermediate 4. Dissolve 12.3g of 2- (4-methylbenzyl) -1H-isoindole-1,3-dione in chloroform, then add 8.7g of chlorosulfonic acid, and react at 80 C for 3h After completion, 15.75 g of Intermediate 4 was obtained after washing with water and removing the solvent, and the yield was 95%.

The synthetic route of 2-(4-Methylbenzyl)isoindoline-1,3-dione has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Zhengzhou Shouxing Pharmaceutical Institute Co., Ltd.; Deng Zhaoxi; (13 pag.)CN110483497; (2019); A;,
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Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 317-20-4, name is 7-Fluoroisatin, This compound has unique chemical properties. The synthetic route is as follows., Application In Synthesis of 7-Fluoroisatin

General procedure: The mixture of isatin (1 mmol), 3-amino-1-phenyl-1H-pyrazol-5(4H)-one (1 mmol), 1,2-diarylethan-1-one, 2,3-dihydroinden-1-one (1 mmol) or 3,4-dihydronaphthalen-1(2H)-one (1 mmol), H2O (6 mL), HOAc (2 mL) was put in a reaction flask under 90 C about 5-7 h (monitored by TLC). After completion, the reaction mixture was cooled to room temperature and the products would be isolated out at same time. Then, compound 4 was recrystallized from DMF, however, the pure products of 6 and 8 were filtered from water, dried, without further recrystallization.

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 reaction routes of 317-20-4.

Reference:
Article; Wang, Zhansheng; Gao, Lingli; Xu, Zhongyun; Ling, Zhi; Qin, Yaqi; Rong, Liangce; Tu, Shu-Jiang; Tetrahedron; vol. 73; 4; (2017); p. 385 – 394;,
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Reference of 1127-59-9, A common heterocyclic compound, 1127-59-9, name is 7-Methylindoline-2,3-dione, molecular formula is C9H7NO2, 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.

General procedure: A sealed tube was charged with isatin 1 (1a 147 mg, 1.0 mmol), ammonia hydrate 2 (25percent, 421 mg, 3.0 mmol) and H2O2 (30percent, 227 mg, 2.0 mmol) at room temperature, and then solvent DMSO (4 mL) was added. The resulting mixture was stirred at 30 °C in a sealed vessel under air after 4 h, then added 50 mL water to the mixture, extracted with CH3COOC2H5 3 times (3 x 50 mL). The extract was washed with 30percent NaCl solution (V/V), dried over anhydrous Na2SO4 and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (Petroleum ether/Ethyl acetate = 3:1) to yield the desired product 3a as a yellow solid (89percent yield).

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Article; Wang, Yu-Wei; Zheng, Lei; Jia, Feng-Cheng; Chen, Yun-Feng; Wu, An-Xin; Tetrahedron; vol. 75; 11; (2019); p. 1497 – 1503;,
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