Tag: M.W=200-300

Application of 954-81-4, 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 954-81-4 as follows.

8.7ml (6 · 5 X 102 moles) 1,5-dibromopentane with6 g (3. 2 X 10 2 moles) Phthalimide potassium salt dissolved in 100ml of N, N- dimethylformamide andunder room temperatureit was stirred for 15hours.The solvent was distilled off under reduced pressure, The residue usingn-hexane: ethyl acetate with a volumeratio of 10: 1 eluent to carry out column chromatography, gradually increasingthe polarity to hexane: ethyl acetate with a volume ratio of 5: 1 to give a product of 6.9g(2.3X102 mol) a bromogroup substituted by Phthalimide. The product with 5. 9g (4. 7X 102 mol) of sodium sulfite, 140ml water and 85ml95% ethanol mixed reactionwas heated to 95 C for18h, the remainingsolvent was drained, and the resulting residue was mixed with 73ml ofconcentrated hydrochloric acidthen was heated to 110 C thefor 18H, it was drained, with water – 95% ethanol on the residue to carry out recrystallization to give 5-amino-1-pentylSulfonic acid 2. 7g (total yield 50%).

According to the analysis of related databases, 954-81-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Institute of Chemistry Chinese Academy of Sciences; zhao, jingquan; DENG, HONG; XEI, JIE; (16 pag.)CN101948412; (2016); B;,
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Reference of 1677-48-1, A common heterocyclic compound, 1677-48-1, name is 5,6-Dichloroindoline-2,3-dione, molecular formula is C8H3Cl2NO2, 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.

7.5 g of 1-bromo-2-methoxybenzene are added dropwise to a suspension of 1.1 g of magnesium in 20 ml of ether containing a few crystals of iodine, the reflux being maintained once it has started. At the end of the addition, the mixture is heated at reflux for 2 hours. A suspension of 4.3 g of 5,6-dichloro-1H-indole-2,3-dione in 20 ml of THF is then added and the resulting mixture is refluxed for 30 minutes. After cooling to RT, the reaction mixture is poured into a water/ice/concentrated HCl mixture and extracted with EtOAc, the organic phase is dried over Na2SO4 and the solvent is evaporated off under vacuum. The residue is triturated in hot iso ether and the precipitate formed is filtered off by suction and washed with ether. 5.2 g of the expected product are obtained, m.p.=245-246 C.

The synthetic route of 1677-48-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Di Malta, Alain; Garcia, Georges; Roux, Richard; Schoentjes, Bruno; Serradeil-Le Gal, Claudine; Tonnerre, Bernard; Wagnon, Jean; US2004/180878; (2004); 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. 181140-34-1, name is (R)-(-)-N-(2,3-Epoxypropyl)phthalimide, A new synthetic method of this compound is introduced below., COA of Formula: C11H9NO3

General procedure: Suspension of starting compound (2a-e) and (S)-N-(2,3-epoxypropyl)phthalimide or (R)-N-(2,3-epoxypropyl)phthalimide (1 eq.) in absolute ethanol (0.2 M) was refluxed for 15 h. The crude product precipitated from clear solution at 0 C. Compounds 3a-f were purified either by flash column chromatography using EtOAc/hexane as eluant or by recrystallization from absolute ethanol.

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; Trstenjak, Uro?; Ila?, Janez; Kikelj, Danijel; European Journal of Medicinal Chemistry; vol. 64; (2013); p. 302 – 313;,
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Reference of 169037-23-4, 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 169037-23-4 as follows.

General procedure: A mixture of indoline-2,3-dione 1 (1mmol), l-tryptophan (2a) or l-histidine 2b (1mmol) and (E)-(2-nitrovinyl)benzene 3 (1.1mmol) was heated while stirred in [bmim]Br as the reaction medium (3mL) for 1hat 100C. After completion of the reaction (TLC), EtOAc (5mL) was added and the reaction mixture was stirred for 10min. This treatment was repeated and the combined ethyl acetate layers were removed in vacuo. The crude product was purified by recrystallization of the residue from EtOH (compounds 4) or by column chromatography (compounds 5). After extraction of the product, the ionic liquid was dried under vacuum at 80C for 2h to eliminate any water and could be reused for subsequent runs of the reaction.

According to the analysis of related databases, 169037-23-4, the application of this compound in the production field has become more and more popular.

Reference:
Article; Arumugam, Natarajan; Almansour, Abdulrahman I.; Kumar, Raju Suresh; Periasamy, Vaiyapuri Subbarayan; Athinarayanan, Jegan; Alshatwi, Ali A.; Govindasami, Periyasami; Altaf, Mohammad; Menendez, J. Carlos; Tetrahedron; vol. 74; 38; (2018); p. 5358 – 5366;,
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Reference of 5332-26-3,Some common heterocyclic compound, 5332-26-3, name is 2-(Bromomethyl)isoindoline-1,3-dione, molecular formula is C9H6BrNO2, 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: Appropriate bromide (1.5 mmol) was dissolved in 15 mL of DMF (dried) and sodium azide (1.6 mmol, 104 mg) was added. The mixture was stirred vigorously at room temperature. After 12 h the reaction was quenched by adding 15 mL of distilled water (slightly exothermic reaction). The cooled reaction mixture (room temperature) was extracted twice with 30 mL of diethyl ether and washed with water (once with 20 mL). The separated organic layer was dried over anhydrous sodium sulphate and evaporated to dryness. The product obtained as white solid was washed with 30mL of distilled water.

The synthetic route of 5332-26-3 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Pyta, Krystian; Klich, Katarzyna; Domagalska, Joanna; Przybylski, Piotr; European Journal of Medicinal Chemistry; vol. 84; (2014); p. 651 – 676;,
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Electric Literature of 201940-08-1, 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. 201940-08-1, name is tert-Butyl 5-bromoisoindoline-2-carboxylate, This compound has unique chemical properties. The synthetic route is as follows.

0.69 ml of n-Butyl lithium (2.5M solution in hexane) was added dropwise to a stirred solution of 5- bromo-1,3-dihydro-isoindole-2-carboxylic acid tert-butyl ester (429 mg; 1.44 mmol) in anhydrous THF (10 ml) at -78C under an atmosphere of nitrogen. The reaction was stirred for 50 minutes then 1-methyl-4-piperidone (212 mul; 1.2 equiv.) was added and stirred at -78C for a further 60 minutes then warmed to room temperature. The reaction was quenched with saturated ammonium chloride solution then extracted with EtOAc. The EtOAc layer was washed with saturated NaHCO3, brine, dried (MgSO4) and evaporated. Purification by flash column chromatography on SiO2, gradient elution from 0% to 10% 2M methanolic ammonia / DCM gave 111 mg of 5-(4-hydroxy-1-methyl- piperidin-4-yl)-1 ,3-dihydro-isoindole-2-carboxylic acid tert-butyl ester as a colourless oil.

The chemical industry reduces the impact on the environment during synthesis tert-Butyl 5-bromoisoindoline-2-carboxylate. I believe this compound will play a more active role in future production and life.

Reference:
Patent; ASTEX THERAPEUTICS LIMITED; WO2008/44045; (2008); A1;,
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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. 20870-90-0, name is 5-Bromo-1-methyl-2-oxoindoline, This compound has unique chemical properties. The synthetic route is as follows., Recommanded Product: 20870-90-0

To a solution of 5-bromo-1-methyl-1 ,3-diotahydro-indol-2-one (CASNo. 20870-90-0, 4.07 g, 18.00 mmol). in DMSO (50 mL) was added biotas(pinaco.ato)diboron (5 03 g, 19.80 mmol), and potassium acetate (5.30 g, 54 0 mmol) Next, [1 , 1 ‘-biotas(diphenylphosphiotano)- ferrocene]-d(chloropalladiotaum(ll) complexed with dichloromethane (CASNo. 72287-26-4, 0 417 g, 0 540 mmol) was added The reaction mixture was degassed by bubbling nitrogen through the solution for 3 minutes The reaction was then heated at 80 C for 18 hr The reaction was then poured into ice-water and extracted three times with diethyl ether, The organic extracts were combined, washed with brine, dned over anhydrous sodium sulfate, filtered and concentrated The resulting residue was purified by silica gel flash chromatography (ethyl acetate-heptane, O to 70%) to afford 1-methyl-5-(4,4,5,5- tetramethyl-(1 ,3,2Jdioxaboro.an-2-yl)-1 ,3-diotahydro-indol-2-one, 1H NMR (400 MHz1 CDCI3) delta ppm 1 35 (s, 12 H), 3.23 (s, 3 H), 3.51 (s, 2 H), 6 83 (d, J=7,6 Hz, 1 H), 7.69 (S1 1 H)1 7,77 (d, J= 7 8 Hz, 1 H),

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 20870-90-0.

Reference:
Patent; NOVARTIS AG; ADAMS, Christopher Michael; CHAMOIN, Sylvie; HU, Qi-Ying; ZHANG, Chun; WO2010/130794; (2010); A1;,
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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. 3416-57-7, name is 2-(2-Oxopropyl)isoindoline-1,3-dione, This compound has unique chemical properties. The synthetic route is as follows., Formula: C11H9NO3

5.5. Examples 5-13; Similar to Examples 3 and 4,5-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-ol was prepared using the following solvent/base combinations for the preparation of the 2-amino-4-methyl-1H-pyrrole-3-carboxamide intermediate:

According to the analysis of related databases, 3416-57-7, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Bednarz, Mark S.; Kanamarlapudi, Ramanaiah C.; Wu, Wenxue; US2008/97098; (2008); A1;,
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These common heterocyclic compound, 5332-26-3, name is 2-(Bromomethyl)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. Application In Synthesis of 2-(Bromomethyl)isoindoline-1,3-dione

To a suspension of NaH (2.2 g, 54 mmole) in THF (200 ml_) was added diethyl 2-(phenylmethyl)butanedioate (12.5 g, 49.9 mmole). After 30 min at RT, bromomethyl phthalimide was added to the reaction mixture and the contents were stirred for 14 h at RT. The reaction was quenched with H2O (15 mL), diluted with Et2O (300 mL) and layers separated. The organic layer was concentrated under vacuum and the resulting residue recrystallized from EtOH (0) to give the title compound (13 g, 64%) as a white solid: LCMS (ES) m/z 410 (M+H)+.

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

Reference:
Patent; SMITHKLINE BEECHAM CORPORATION; WO2007/76423; (2007); A2;,
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Adding a certain compound to certain chemical reactions, such as: 6326-79-0, name is 6-Bromoisatin, 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 6326-79-0, SDS of cas: 6326-79-0

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.

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, 6-Bromoisatin, other downstream synthetic routes, hurry up and to see.

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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