Month: January 2021

Synthetic Route of 6941-75-9, These common heterocyclic compound, 6941-75-9, name is 5-Bromoisoindoline-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.

To a stirring room temperature solution of 4-bromophthalimide (1.02 g, 4.51 mmol) in dimethylformamide (20 mL) add 60% sodium hydride (0.235 g, 5.87 mmol). Stir this mixture at ambient temperature for 15 minutes and then add iodomethane (0.628 mL, 10.09 mmol). Stir the reaction for 30 minutes at ambient temperature then quench it with brine. Extract the resulting aqueous mixture with ethyl acetate. Wash the combined extracts with brine; dry (sodium sulfate) and concentrate them in vacuo. Purify the resulting material on a flash column (silica gel; 70%-100% CH2C12 gradient in hexanes) to obtain the title compound, 0.960 g (89%). MS (IS+) 7nle 240 (M + H’79Br), 242 (M + H, “Br).

The synthetic route of 6941-75-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; ELI LILLY AND COMPANY; WO2005/73205; (2005); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

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. 153171-22-3, name is 2-(4-Bromobenzyl)isoindoline-1,3-dione, A new synthetic method of this compound is introduced below., COA of Formula: C15H10BrNO2

To a solution of 2-(4-bromo-benzyl)-isoindole-l ,3-dione (4.1 g, 13.1 mmol, 1.0 eq) in EtOH (50 mL) was added the Nu2 Eta42Omicron (3.3 g, 65.5 mmol, 5.0 eq). The reaction mixture was stirred for 1 h at rt The solvent was evaporated and water was added, and the mixture was extracted with EtOAc. The organic layer was dried over Na2S04 and evaporated to give 4-bromo-benzylamine which was used without purified as a white solid (2.83 g, quant).

The synthetic route of 153171-22-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; LIFESCI PHARMACEUTICALS, INC.; MCDONALD, Andrew; WO2015/103317; (2015); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

Electric Literature of 17630-75-0, The chemical industry reduces the impact on the environment during synthesis 17630-75-0, name is 5-Chloro-2-oxindole, I believe this compound will play a more active role in future production and life.

7-Bromo-5-chloro-2-oxindole 5-Chloro-2-oxindole (16.8 g) and 19.6 g of N-bromosuccinimide were suspended in 140 mL of acetonitrile and refluxed for 3 hours. Thin layer chromatography (silica, ethyl acetate) at 2 hours of reflux showed 5-chloro-2-oxindole or N-bromosuccinimide (Rf 0.8), product (Rf 0.85) and a second product (Rf 0.9) whose proportions did not change after another hour of reflux. The mixture was cooled to 10 C., the precipitate was collected by vacuum filtration, washed with 25 mL of ethanol and sucked dry for 20 minutes in the funnel to give 14.1 g of wet product (56% yield). The solid was suspended in 200 mL of denatured ethanol and slurry-washed by stirring and refluxing for 10 minutes. The mixture was cooled in an ice bath to 10 C. The solid product was collected by vacuum filtration, washed with 25 mL of ethanol and dried under vacuum at 40 C. to give 12.7 g (51% yield) of 7-bromo-5-chloro-2-oxindole.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 5-Chloro-2-oxindole, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; SUGEN, Inc.; US2003/69421; (2003); A1;; ; Patent; Pharmacia Corporation; US2003/216410; (2003); A1;; ; Patent; Sugen, Inc.; US6051593; (2000); A;; ; Patent; Tang, Peng Cho; Miller, Todd A.; Li, Xiaoyuan; Sun, Li; Wei, Chung Chen; Shirazian, Shahrzad; Liang, Congxin; Vojkovsky, Tomas; Nematalla, Asaad S.; Hawley, Michael; US2002/156292; (2002); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

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 919103-45-0 as follows. Application In Synthesis of 6-Iodoindolin-2-one

Preparation 2: (2-Oxo-2,3-dihydro-1H-indol-6-ylsulfanyl)-benzoic acid CuI (40 mg, 0.05 mmol), potassium carbonate (1.66 g, 12 mmol), 6-iodooxindole (as prepared in Preparation 1; 1.0 g, 4.0 mmol) and 2-mercapto-benzoic acid (0.62 g, 4.0 mmol) were added to a dry schlenk tube. The tube was evacuated and refilled with Ar(g) (3 times). 2-Propanol (5.0 mL) and ethylene glycol (0.5 mL, 8.0 mmol) were injected into the schlenk tube. The schlenk tube was sealed with a teflon valve and was heated to 80 C. and stirred for over 24 hours. Subsequently the reaction mixture was allowed to reach room temperature then diluted with EtOAc (10 mL) and water (10 mL). The mixture was acidified of to a pH=3-4 with the addition of 1 M HCl(aq) and the organics were separated and set aside. The aqueous phase was washed with additional EtOAc (10 mL). The combined organic layers were dried over Na2SO4, filtered and concentrated in vacuo affording a yellow solid. The solid was then purified via flash silica gel chromatography (gradient eluant starting with 5% MeOH in CHCl3 increasing to 10% MeOH in CHCl3) affording the title compound as a pale yellow solid (0.228 g, 0.77 mmol, 20% yield).

According to the analysis of related databases, 919103-45-0, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Allergan, Inc.; US2007/15748; (2007); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

Related Products of 317-20-4, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 317-20-4 name is 7-Fluoroisatin, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

Step 1a: Preparation of 7-fluoro-1-methyl-1H-indole-2,3-dione (6) 7-Fluoro-1H-indole-2,3-dione (5, prepared according to the method of Gassman as described in U.S. Pat. No. 4,188,325, 3.00 g, 0.182 mol), iodomethane (3.40 ml, 0.545 mol) and potassium carbonate (4.92 g, 0.0363 mol) in DMF (15 ml) are stirred at room temperature for 1 hour. The reaction mixture is diluted with cold water and the resulting precipitate filtered and dried to give the title compound as a solid. HPLC r.t. 4.01 min; MS for C9H6FNO2 m/z 180.0 (M+H)+.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 7-Fluoroisatin, and friends who are interested can also refer to it.

Reference:
Patent; Josyula, Vara Prasad Venkata Nagendra; Gordeev, Mikhail; Luehr, Gary; US2006/229349; (2006); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

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. 5428-09-1, name is 2-Allylisoindoline-1,3-dione, A new synthetic method of this compound is introduced below., Recommanded Product: 5428-09-1

General procedure: An oven-dried, two-necked round-bottom flask containing a stir bar was charged with an aryl bromide 1 (1.0 mmol), Pd(OAc)2 (6.8 mg, 0.03 mmol), K2CO3 (165.9 mg, 1.2 mmol), HQ (15.6 mg, 0.1 mmol), allylamine (1.2 mmol), and DMF (3.0 ml) under nitrogen at room temperature. Following degassing three times, the flask was placed in an oil bath, and the mixture was stirred and heated at the appropriate temperature. After an appropriate reaction time, the flask was removed from the oil bath and cooled to room temperature. Water (20 ml) was added, and the mixture was extracted with CH2Cl2 (3¡Á20 ml). The combined organic layer was washed with brine, dried (Na2SO4), filtered, and concentrated in vacuo. The product was purified by flash column chromatography on silica gel using ethyl acetate/hexane as an eluent.

The synthetic route of 5428-09-1 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Jiang, Zhen; Zhang, Lingjuan; Dong, Chaonan; Ma, Baode; Tang, Weijun; Xu, Lijin; Fan, Qinghua; Xiao, Jianliang; Tetrahedron; vol. 68; 24; (2012); p. 4919 – 4926;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

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 5394-18-3 as follows. Safety of 2-(4-Bromobutyl)isoindoline-1,3-dione

General procedure: Amixture of the corresponding secondary amine 7a-d (5.5 mmol), anhydrous K2CO3 (6 mmol) andcompounds 2-4 (5 mmol) was added inCH3CN (20 ml). The mixture was heated at 65 C for 8-10 h. Thesolvent was evaporated under reduced pressure. Then water (25 mL) was added,and the mixture was extracted with dichloromethane (20 mL ¡Á 3). The combinedorganic phases were washed with saturated aqueous NaCl (30 mL), dried oversodium sulfate, and filtered. The solvent was evaporated under a vacuum. The residue was purified on a silicagel chromatography using mixtures of petroleum/acetone as eluent to obtain theoil products 8-10.

According to the analysis of related databases, 5394-18-3, the application of this compound in the production field has become more and more popular.

Reference:
Article; Pan, Wanli; Hu, Ke; Bai, Ping; Yu, Lintao; Ma, Qinge; Li, Tao; Zhang, Xu; Chen, Changzhong; Peng, Kelin; Liu, Wenmin; Sang, Zhipei; Bioorganic and Medicinal Chemistry Letters; vol. 26; 10; (2016); p. 2539 – 2543;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

Synthetic Route of 552330-86-6, These common heterocyclic compound, 552330-86-6, name is 5-Bromoisoindolin-1-one, 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.

Under nitrogen atmosphere, 70 mg of 5-bromo-1-oxo-isoindoline was dissolved in 2 ml of tetrahydrofuran, cooled down to 0C, and then 4 mg of N,N-dimethylaminopyridine and 144 mg of di-tert-butylcarbonate were added. The mixture was stirred at room temperature for 30 min. Methanol was added to the reaction solution, and the solvents were distilled outunder reduced pressure. Water was added to the residues, extracted with ethyl acetate. Ethyl acetate layer was washed with saturated saline solution, and dried with anhydrous sodium sulfate. After distilling out the solvents under reduced pressure, the residues were separated and purified by silicagel column chromatography (ethyl acetate/hexane=1/2), to obtain 51.2 mg of the above compound as a white solid. 1HNMR(400MHz,CDCl3.)delta.:1.60(9H,s), 4.74(2H,s), 7.62-7.65(2H,m), 7.76(1H,d,J=8.0Hz). 1) Manufacture of 5-bromo-2-tert-butoxycarbonyl-1-oxo-isoindoline Under nitrogen atmosphere, 1.5 mg of 5-bromo-1-oxo-isoindoline was dissolved in 20 ml of tetrahydrofuran, cooled down to 0C. Then, 85 mg of N,N-dimethylaminopyridine and 3.0 ml of tert-butylcarbonate were added, and the mixture was stirred at room temperature for 30 min. Methanol was added to the reaction solution, and the solvents were distilled outunder reduced pressure. Water was added to the residues, extracted with ethyl acetate. Ethyl acetate layer was washed with saturated saline solution, and dried with anhydrous sodium sulfate. After distilling out the solvents under reduced pressure, the residues were separated and purified by silicagel column chromatography (ethyl acetate/hexane=1/2), to obtain 300 mg of the above compound as a white solid. 1HNMR(400MHz,CDCl3.)delta.:1.60(9H,s), 4.74(2H,s), 7.62-7.65(2H,m), 7.76(1H,d,J=8.0Hz) ESI-MS Found:m/z 344.2[M+Na]+

Statistics shows that 5-Bromoisoindolin-1-one is playing an increasingly important role. we look forward to future research findings about 552330-86-6.

Reference:
Patent; BANYU PHARMACEUTICAL CO., LTD.; EP1726585; (2006); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

These common heterocyclic compound, 954-81-4, name is N-(5-Bromopentyl)phthalimide, 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. Application In Synthesis of N-(5-Bromopentyl)phthalimide

General procedure: Compound 5 (5.67g, 12mmol) was added into MeCN (50mL), and then Compound 6-9 (14.2mmol) were added, respectively. After an addition of K2CO3 (5.9g, 42.6mmol), the mixture was refluxed for 24h and followed by TLC. After the solvent was removed by distillation under reduced pressure, the residue was dissolved in EtOAc (200mL), and washed by water (3¡Á50mL). The organic phase was dried by MgSO4, and then was evaporated. The crude product was purified by column chromatography (DCM/EtOAc=20:1, Rf=0.7) to give 10-13 as white solid.

The synthetic route of N-(5-Bromopentyl)phthalimide has been constantly updated, and we look forward to future research findings.

Reference:
Article; Duan, Xiaojiang; Ruan, Qing; Gan, Qianqian; Song, Xiaoqing; Fang, Si’an; Zhang, Xuran; Zhang, Junbo; Journal of Organometallic Chemistry; vol. 868; (2018); p. 154 – 163;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

Adding a certain compound to certain chemical reactions, such as: 16800-68-3, name is 1-Acetylindolin-3-one, belongs to indolines-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 16800-68-3, Recommanded Product: 16800-68-3

General procedure: 1a (35 mg, 0.2 mmol, 1 equiv.), tert-BuOK (22.4 mg, 0.2 mmol, 1.0 equiv.) were added to a Schlenk tube. Then 2 mL THF was added using a syringe. The reaction mixture was stirred 15 min,and then 6 ( 0.2 mmol, 1.0 eq) was added, and the reaction was stirred at room temperature for 10 hours. the solvent was removed in vacuo and the residue was purified by silica gel using a propereluent (EtOAc/Hexane) to afford the desired products.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 1-Acetylindolin-3-one, and friends who are interested can also refer to it.

Reference:
Article; Zhang, Yanxia; Han, Jianwei; Liu, Zhen-Jiang; Synlett; vol. 26; 18; (2015); p. 2593 – 2597;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem