Month: July 2021

These common heterocyclic compound, 4702-13-0, name is N-Phthaloylglycine, 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. Safety of N-Phthaloylglycine

To 10.25 g of (1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)acetic acid dissolved in 50 ml of dichloromethane are added, at room temperature, 4.6 ml of oxalyl chloride and 2 drops of DMF, and the mixture is left for 18 hours at room temperature. The resulting mixture is evaporated to dryness to give 11 g of the expected product.

The synthetic route of N-Phthaloylglycine has been constantly updated, and we look forward to future research findings.

Reference:
Patent; SANOFI-AVENTIS; US2007/185136; (2007); A1;,
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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. 199328-10-4, name is Methyl Oxindole-5-carboxylate, A new synthetic method of this compound is introduced below., name: Methyl Oxindole-5-carboxylate

Into a 50-mL round-bottom flask was placed methyl 2-oxo-2,3-dihydro-1H- indole-5-carboxylate (800 mg, 4.18 mmol, 1.00 equiv) and methanol (10 mL). This was followed by the addition of a solution of NaOH (670 mg, 16.75 mmol, 4.00 equiv) in water (10 mL) dropwise with stirring at 0oC. The resulting solution was stirred for 14 h at 20oC. The mixture was then concentrated under vacuum and the residue taken up in 20 mL of H2O. This was washed with 2×5 mL of dichloromethane. The pH was adjusted to 4 with hydrochloric acid (1 N) and extracted with 5×50 mL of ethyl acetate and the organic layers combined. Concentration resulted in 592 mg (80%) of 2-oxo-2,3-dihydro- 1H-indole-5-carboxylic acid as a yellow solid

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:
Patent; Epizyme, Inc.; Poley, Megan Allen Clunan; Kunz, Kevin Wayne; Mills, James Edward John; Mitchell, Lona Helen; munckhof, Michael John; Harvey, Darren Martin; (303 pag.)KR2017/45749; (2017); A;,
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Reference of 56341-37-8, 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. 56341-37-8 name is 6-Chlorooxindole, 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.

Example 3Preparation of 6-chloro-5-(chloroacetyl) oxindole :Charged with 500 ml of ethylene dichloride and A1C13 (250gm) in a 3 litre there-neck flask under nitrogen atmosphere at 25 to 30C. Add 84.19 gm of chloroacetyl chloride slowly at RT controlling the exotherm and stirred for 30 minutes.Contents are further added with 100 gm of 6- chloro-oxindoie at 35-37C in an hour. Stirring is continued at 35-37C for 10-12 hrs.Cool gradually to 0 to 5C and pour into ice, and water under stirring over 30 minutes. Stir for 30 minutes, remove ethylene dichloride by distlation under vacuum, cool the mass and filter off the product wash with water till it is neutral. Purify the product using 1,4- dioxane if required.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 6-Chlorooxindole, and friends who are interested can also refer to it.

Reference:
Patent; ARCH PHARMALABS LIMITED; GHOGARE, Bhausaheb Nana; DESHPANDE, Uday K.; PAI, Ganesh Gurpur; MANDAL, Arun Kanti; CHARANJIT, Sehgal; NEHA, Dixit Akshaya; WO2012/20424; (2012); A1;,
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Reference of 6341-92-0, 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 6341-92-0 as follows.

General procedure: A mixture of isatin 1 (1.0 mmol), malononitrile or cyanoacetic ester 2 (1.0 mmol), phthalhydrazide (1.0 mmol), and NiCl2 (0.2 mmol) in PEG 600 (5 mL) was stirred at 100 C for the appropriate time (refPreviewPlaceHolderTable 2). After complete conversion as indicated by TLC, water was added and the product was extracted with ethyl acetate (2×10 ml). The organic phase was dried over anhydrous Na2SO4, and concentrated under reduced pressure. The crude product was recrystallized from ethanol to afford the pure product.

According to the analysis of related databases, 6341-92-0, the application of this compound in the production field has become more and more popular.

Reference:
Article; Zhang, Xiao-Nan; Li, Yong-Xiao; Zhang, Zhan-Hui; Tetrahedron; vol. 67; 38; (2011); p. 7426 – 7430;,
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Some common heterocyclic compound, 2058-74-4, name is 1-Methylisatin, molecular formula is C9H7NO2, 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. Safety of 1-Methylisatin

General procedure: First phenyl acetylene (1 mmol) was stirred with Et3N (1 mmol) in CH3CN (5 mL) at room temperature. After 15-20 min, N-methyl isatin (1 mmol) and InBr3 (15 mol%) was added and the reaction mixture was stirred for 16-18h. When N-methyl isatin was completely consumed as indicated by TLC, phenacyl bromide (1 mmol) was added and the reaction mixture was stirred until the reaction reached completion, as evidenced by TLC. Acetonitrile was distilled out under reduced pressure and the residue was purified by silica gel (mesh 60-120) chromatography (hexane-EtOAc) to afford the corresponding products.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2058-74-4, its application will become more common.

Reference:
Article; Siddiqui; Rahila; Shamim, Shayna; Rai, Pragati; Shireen; Waseem, Malik A.; Abumhdi, Afaf A.H.; Tetrahedron Letters; vol. 54; 51; (2013); p. 6991 – 6994;,
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Synthetic Route of 17564-64-6,Some common heterocyclic compound, 17564-64-6, name is 2-(Chloromethyl)isoindoline-1,3-dione, molecular formula is C9H6ClNO2, 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: The initial carbonyl compound (50 mmol) was dissolved/suspended in ethanol (50 mL) and magnetically stirred with thiosemicarbazide (50 mmol) and catalytic amounts of acetic acid for 8-24 h at room temperature. The obtained thiosemicarbazone was filtered, washed with appropriate solvent (n-hexane, petroleumether or diethyl ether) and dried under vacuum. The intermediate thiosemicarbazone (50 mmol) reacted with ethyl bromoacetate (50 mmol), in methanol (50 mL) and sodium acetate (50 mmol) at room temperature under magnetic stirring for 24 h. The resulting 4-thiazolidinone was poured on ice, filtered or extracted with chloroform (3 x 100 mL) and purified by column chromatography (SiO2, ethyl acetate/n-hexane). Then, the obtained thiazolidinone (50 mmol) was dissolved/suspended in 50 mL of anhydrous acetone in the presence of anhydrous potassium carbonate (50 mmol), and reacted with equimolar amounts of 4-nitrobenzyl bromide, 1-(chloromethyl)naphthalene and N-(chloromethyl)phthalimide for 24-48 h. The product was poured on ice, filtered or extracted with chloroform (3 x 50 mL) and purified by column chromatography (SiO2, ethyl acetate/n-hexane) in order to obtain the title compoundsin high yields. 7.1.59 2-((2-(2-(Heptan-2-ylidene)hydrazono)-4-oxothiazolidin-3-yl)methyl)isoindoline-1,3-dione (7C) Grey powder, mp 84-85 C, 85% yield; 1H NMR (400 MHz, DMSO-d6): delta 1.19-1.29 (m, 8H, CH2), 1.92 (s, 3H, CH3), 2.20-2.28 (t, 3H, CH3), 3.78 (s, 2H, CH2, thiazolidinone), 5.53 (s, 2H, ArCH2), 7.88-7.89 (m, 4H, Ar).

The synthetic route of 17564-64-6 has been constantly updated, and we look forward to future research findings.

Reference:
Article; De Monte, Celeste; Carradori, Simone; Bizzarri, Bruna; Bolasco, Adriana; Caprara, Federica; Mollica, Adriano; Rivanera, Daniela; Mari, Emanuela; Zicari, Alessandra; Akdemir, Atilla; Secci, Daniela; European Journal of Medicinal Chemistry; vol. 107; (2016); p. 82 – 96;,
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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. 18711-13-2, name is 4,7-Dichloroindoline-2,3-dione, A new synthetic method of this compound is introduced below., Quality Control of 4,7-Dichloroindoline-2,3-dione

General procedure: To a solution of C3-beta-cholestrylcarboxylate (4) (1 mmol) in aqueousmethanol (20 mL), sarcosine (2) (1 mmol) and a mixture of varioussubstituted isatin (1a-f)/acenapthenequinone (7)/ninhydrin (9)(1 mmol) stirred for 1-2 h at reflux temperature. After the completionof reaction as indicated by TLC, methanol was evaporated under reducedpressure. The crude product was purified by column chromatographyusing hexane:EtOAc (7:3) as eluent.

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; Periyasami, Govindasami; Kamalraj, Subban; Padmanaban, Ramanathan; Yeswanth Kumar, Santhakumar; Stalin, Antony; Arumugam, Natarajan; Suresh Kumar, Raju; Rahaman, Mostafizur; Durairaju, Periyan; Alrehaili, Abdulaziz; Aldalbahi, Ali; Bioorganic Chemistry; vol. 88; (2019);,
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Electric Literature of 5332-26-3, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 5332-26-3, name is 2-(Bromomethyl)isoindoline-1,3-dione belongs to indolines-derivatives compound, it is a common compound, a new synthetic route is introduced below.

Dried C6H5-closo-1,2-C2B10H12 2.00 g (9.06 mmol) was dissolved in DME (40 ml) under argon, the solution was then cooled down to -33 C. and BuLi (2.5 M in hexane, 4.0 ml, 10,0 mmol) was added dropwise from a syringe. The reaction mixture was stirred for additional 15 min., then left to warm up to room temperature and cooled down again to -33 C., solution of bromopropyl phtalimide in DME (15 ml) was added slowly, reaction mixture was then kept at low temperature for 15 min. and then left to warm slowly under stirring to room temperature over 4 h and left to stand overnight. Solids were removed by filtration under argon and washed with DME (2×10 ml). Diluted acetic acid (3 M, 0.5 ml) was added to filtrate and the volatiles were removed in vacuum. Solids were dissolved in benzene and the injected atop of a silica gel column (25×3 cm I.D.). The unreacted starting compound (440 mg, 22%) was eluted by benzene, whereas the propyl phtalimide intermediate was isolated by elution with benzene-CH3CN (95:5) and evaporated to dryness; yield 1.95 g (53%).

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, 2-(Bromomethyl)isoindoline-1,3-dione, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; UNIVERZITA PALACKEHO V OLOMOUCI; USTAV ORGANICKE CHEMIE A BIOCHEME AKADEMIE VED CESKE REPUBLIKY, v.v.i.; USTAV MOLEKULARNI GENETIKY AKADEMIE VED CESKE REPUBLIKY, v.v.i; Brynda, Jiri; Cigler, Petr; Gruner, Bohumir; Maloy Rezacova, Pavlina; Mader, Pavel; Sicha, Vaclav; Bakardjiev, Mario; Holub, Josef; Dzubak, Petr; Hajduch, Marian; US2014/303390; (2014); A1;,
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Application of 496-12-8,Some common heterocyclic compound, 496-12-8, name is Isoindoline, molecular formula is C8H9N, 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.

Stage 1: 5-nitro-isoindoline (I-12) A solution of isoindoline (3.9 g, 32.8 mmol, 1.0 eq.) in dichloromethane (20 mL) was stirred below -20 C. with exclusion of moisture while adding dropwise sulphuric acid (98%, 16.0 mL). The 2-layer mixture was allowed to reach 20 C. and then dichloromethane was removed under vacuum. The resulting pale brown solution was stirred and kept below 20 C. while adding nitric acid (70%, 3.9 mL) dropwise. The resulting pale orange-red solution was added with stirring to ice/water (300 mL) and tert-butyl methyl ether (100 mL). Sodium hydrogen carbonate (59 g) was added in portions and finally 4M aqueous sodium hydroxide (10 mL). The layers were separated and the aqueous phase extracted with tert-butyl methyl ether (4*150 mL). The combined organic phases were dried (sodium sulphate) and evaporated giving a red-brown gum (4.6 g, 85%) which was used in the next stage without purification. 1H NMR (250 MHz, CHLOROFORM-d) delta ppm 8.05-8.19 (m, 2H) 7.38 (d, J=8.83 Hz, 1H) 4.32 (s, 4H) 2.14 (br. s., 1H)

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

Reference:
Patent; INTERMUNE, INC.; US2010/119479; (2010); A1;,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem

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. 14389-06-1, name is 5-Chloro-7-methylindoline-2,3-dione, This compound has unique chemical properties. The synthetic route is as follows., Application In Synthesis of 5-Chloro-7-methylindoline-2,3-dione

General procedure: TiCl4 (0.7 mL, 6 mmol)was added to a stirred suspension of Zn powder (0.78 g, 12 mmol) in freshlydistilled anhydrous THF (15 mL) at room temperature (rt) under a dry N2atmosphere. After completion of the addition, the mixture was refluxed for 2 h.The suspension of the low-valent titanium reagent thus-formed was cooled tort. A solution of isatin or its derivatives 1 or 3 (2 mmol) in THF (10 mL) wasadded dropwise. The mixture was stirred at room temperature for about 5 minunder N2. After this period, the thin layer chromatography (TLC) analysis of themixture showed the reaction completed. The reaction mixture was quenchedwith 3% HCl (15 mL) and extracted with CHCl3 (3 50 mL). The combinedextracts were washed with water (3 50 mL) and dried over anhydrousNa2SO4. After evaporation of the solvent under reduced pressure, the crudeproduct was purified by column chromatography (petroleum ether/ethylacetate = 5:1) to give the pure products 2 or 4.

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 14389-06-1.

Reference:
Article; Lin, Wei; Hu, Ming-Hua; Feng, Xian; Fu, Lei; Cao, Cheng-Pao; Huang, Zhi-Bin; Shi, Da-Qing; Tetrahedron Letters; vol. 55; 14; (2014); p. 2238 – 2242;,
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