Month: May 2021

Synthetic Route of 41663-84-7,Some common heterocyclic compound, 41663-84-7, name is 2-Methyl-5-nitroisoindoline-1,3-dione, molecular formula is C9H6N2O4, 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.

Example 2. To a reaction vessel containing dimethylacetamide (25 ml) were added 4-nitro-N-methylphthalimide (0.50g, 0.00243 mol), biphenyl (0.204g, 0.00132 mol) and sodium hydrogen sulfide (0.14g, 0.0025 mol). The reaction was allowed to proceed at 70C for 24 hours. samples of the reaction mixture were taken and examined by HPLC methods. A yield of 16.3% 4,4’bis(N-methylphthalimide)sulfide was indicated. The isolated yield was 15% (0.035g).

The synthetic route of 41663-84-7 has been constantly updated, and we look forward to future research findings.

Electric Literature of 356068-93-4,Some common heterocyclic compound, 356068-93-4, name is (Z)-5-((5-Fluoro-2-oxoindolin-3-ylidene)methyl)-2,4-dimethyl-1H-pyrrole-3-carboxylic acid, molecular formula is C16H13FN2O3, 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.

Example 2: Preparation of 7V-(2-(hvdroxycarbamoyl)ethyl)5-(YZ)-(5-fluoro-2- oxoindolin- 3-ylidene)methvD-2,4-dimethyl-lH-pyrrole-3- carboxamide (compound 2) Step 2a. Methyl 3-(5-((Z)-(5-fluoro-2-oxoindolin-3-ylidene)methyl) -2,4- dimethyl- lH-pyrrole-3-carboxamido)propanoate (compound 110-2 ) To a stirred solution of 1 (0.5 g, 1.67 mmol) in DMF( 35 mL) at room temperature was added HOBt(1.02 g, 7.52 mmol), triethylamine (2.12 mL, 15.03 mmol), ECDI-HCl(1.44 g, 1.52 mmol) and methyl 3-aminopropanate hydrochloride^.7 g, 5.0 mmol) successively. The mixture was stirred for 24 h at room temperature and then was diluted with water (20 mL), brine (20 mL) and saturated bicarbonate solution (20 mL) and the pH of solution was adjusted to 11-12 with 10 mol/L NaOH. The mixture was filtrated and the solid was collected washed with water, dried to obtain crude yellow solid product 110-2 (0.44 g, 68.3%). LCMS: m/z 386(M+1), 1H NMR(DMSO-^6) delta2.38 (s, 3H), 2.41 (s, 3H), 2.50 (t, 2H),3.44 ( t, 2H), 3.62 (s,3H), 6.85 (m, 2H), 7.71 (m,3H), 10.86 (s, IH), 13.69 (s, IH).

The synthetic route of 356068-93-4 has been constantly updated, and we look forward to future research findings.

Application of 20870-90-0, 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 20870-90-0 as follows.

General procedure: To a precooled stirring suspension of NaH (6.0 mmol, 0.144 g) in THF (10 mL) at -78 C was added a solution of N-methyloxindole (5a) (6.0 mmol, 0.883 g) in THF (10 mL) dropwise. Then the cooling bath was removed and stirring continued for 5 min (till the formation of clear solution). Then the reaction mixture was again cooled to -78 C and a solution of methyl 3-hydroxy-2-methylene-3-phenylpropanoate (6a) (2.0 mmol, 0.468 g) in THF (15 mL) was added dropwise over 30 min. After stirring for further 10 min at the same temperature, the cooling bath was removed and the reaction was quenched with saturated NH4Cl solution and extracted with EtOAc (3×30 mL). Combined organic layer was dried over anhydrous Na2SO4.. Solvent was removed and the crude obtained was purified by column chromatography(10-15% EtOAc in hexanes) provided title compound (7a) (0.539 g) as a colorless solid in 84% yield.

According to the analysis of related databases, 20870-90-0, the application of this compound in the production field has become more and more popular.

Application of 25369-33-9, These common heterocyclic compound, 25369-33-9, name is 7-Chloroindolin-2-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.

To a solution of Scheme 9-1 compound 1 (1 equiv) in acetonitrile (10 vol) at 0 C was added NBS (1.1 equiv). The reaction mixture was stirred at room temperature for 3 h and then quenched with water. The resulting mixture was extracted with ethyl acetate. The organic layer was separated, dried over anhydrous Na2S04, filtered and then concentrated. The residue was purified by column chromatography on silica gel to afford Scheme 9-1 compound 2.

Statistics shows that 7-Chloroindolin-2-one is playing an increasingly important role. we look forward to future research findings about 25369-33-9.

These common heterocyclic compound, 1201923-48-9, name is (S)-tert-Butyl (1-(1,3-dioxoisoindolin-2-yl)-3-(3-fluorophenyl)propan-2-yl)carbamate, 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. Recommanded Product: (S)-tert-Butyl (1-(1,3-dioxoisoindolin-2-yl)-3-(3-fluorophenyl)propan-2-yl)carbamate

c) 2-[(2S)-2-amino-3-(3-fluorophenyl)propyl]-1 H-isoindole-1 ,3(2H)-dioneTo a solution of 1 ,1-dimethylethyl 1 ,1-dimethylethyl {(1 S)-2-(1 ,3-dioxo-1 ,3-dihydro- 2/-/-isoindol-2-yl)-1-[(3-fluorophenyl)methyl]ethyl}carbamate (9.0 g, 22.6 mmol) in DCM (200 ml.) at RT was added 4M HCI in dioxane (56 ml_, 226 mmoles). After 12h, the solution was filtered and washed with DCM (50 ml.) affording the title compound (7.8 g, 99%) as a white HCI salt: LCMS (ES) m/z 349 (M+H)+.

The synthetic route of (S)-tert-Butyl (1-(1,3-dioxoisoindolin-2-yl)-3-(3-fluorophenyl)propan-2-yl)carbamate has been constantly updated, and we look forward to future research findings.

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 18711-15-4 as follows. category: indolines-derivatives

At room temperature, to a solution of the intermediate I-2 (5.0 g, 23.1 mmol) prepared by the above peparation example I(2) in 75 mL 1N NaOH (aq) was added portionwise hydrogen peroxide (28% v/v, 10 mL). The reaction mixture was filtered after stirring for 2 hours to remove insoluble dark brown solid. The filterate was then carefully acidified to pH 2 by conc. hydrochloric acid. The formed yellow precipitates were collected, washed with water, and dried in vacuo. The objective compound (3.90 g, 82%) was obtained as ivory-colored solid by recrystalization from benzene: TLC Rf=0.1 (EtOAc:n-hexane=1:1); m.p. 188-189 C.; 1H NMR (DMSO-d6) delta 6.76 (d, J=1.9 Hz, 1H, ArH), 6.85 (d, J=1.9 Hz, 1H, ArH); MS (EI) m/e 206 [M+], 162 [M+-CO2].

According to the analysis of related databases, 18711-15-4, the application of this compound in the production field has become more and more popular.

Adding a certain compound to certain chemical reactions, such as: 2436-29-5, name is 3-(1,3-Dioxoisoindolin-2-yl)propanal, 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 2436-29-5, Computed Properties of C11H9NO3

150.0 mg (0.42 mmol) of (1 R)- 1- [1 -benzyl-4-(2,5-difluorophenyl)- I H-pyrrol-2-yl] -2,2-dimethyipropan-1-amine (intermediate C52) were initially charged in 2.0 ml of dichloromethane, and 29.2 mg (0.49mmol) of HOAc and 125.6 mg (0.59 mmol) of sodium triacetoxyborohydride were added and the mixture was stirred at RI for 5 mm. 98.9 mg (0.49 mmol) of 3-(1,3-dioxo-1,3-dihydro-2H-isoindol-2- yl)propanal were added. Ihe reaction mixture was stirred at RI overnight. Ihe reaction mixture was then diluted with ethyl acetate and the organic phase was washed twice with saturated sodium carbonate solution and once with saturated NaC1 solution. After drying over magnesium sulphate, the solvent wasevaporated under reduced pressure and the residue was purified using silica gel (mobile phase:dichloromethane/methanol 100:1). The solvents were evaporated under reduced pressure and the residue was dried under high vacuum. Ihis gave 188.6 mg (74%) of the compound 2-[3-({(1R)-1-[1-benzyl-4- (2,5-difluorophenyl)- 1 H-pyrrol-2-yl] -2,2-dimethylpropyl} amino)propyl] -1 H-isoindole- I ,3(2H)-dione.LC-MS (Method 1): R1 = 1.00 mm; MS (ESIpos): mz = 541 [M+H]+.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 3-(1,3-Dioxoisoindolin-2-yl)propanal, and friends who are interested can also refer to it.

Electric Literature of 3484-35-3, These common heterocyclic compound, 3484-35-3, name is 5-Methylindolin-2-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.

General procedure: A reaction mixture of compound 19-21 (2.35 mmol),compound 14-18 (2.14 mmol) and 2 drops of piperidine was stirred at RT for 3 h. The precipitate was filtered off and dried. The crude compound was purified by column chromatography using ethyl acetate in dichloromethane (13%) to afford the desired products (4, 22-32).

Statistics shows that 5-Methylindolin-2-one is playing an increasingly important role. we look forward to future research findings about 3484-35-3.

Application of 20870-90-0,Some common heterocyclic compound, 20870-90-0, name is 5-Bromo-1-methyl-2-oxoindoline, molecular formula is C9H8BrNO, 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 mixture of oxindole 1 (0.30 mmol), allenoate 2 (0.75 mmol), PPh3 (0.045 mmol) in xylene (2.0 mL, dried over 4 A MS) was stirred at 50 C under Ar atmosphere for 24 h. After completion of the reaction (indicated by TLC), the mixture was quenched with saturated NaCl solution and diluted with EtOAc, followed by washing with H2O and saturated NaCl solution, and finally dried over Na2SO4. The crude product was purified by flash column chromatography to provide the corresponding product 3.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 5-Bromo-1-methyl-2-oxoindoline, its application will become more common.

Application of 39603-24-2, These common heterocyclic compound, 39603-24-2, name is 5,7-Dimethylindoline-2,3-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.

General procedure: (The reagents were purchased fromAdamas and used without further purification.) A dry 3-mL flask was chargedwith relevant isatin 5 (0.3 mmol), tert-butyl 2-aminoacetate hydrochloride 7(0.3 mmol) and benzophenone imine 8 (0.36 mmol). The reaction mixture wasstirred at room temperature for the corresponding time. After the completionof the reaction, the reaction mixture was directly purified by silica gelchromatography (ethyl acetate/petroleum ether = 1:4) to give product 6. Asolution of 6 in EA/TFA (10:1) was stirred in a 10-mL flask under roomtemperature for 3 h. The solvent was removed under vacuum. The residue wasrecrystallized in diethyl ether/petroleum ether to give product 9.

The synthetic route of 39603-24-2 has been constantly updated, and we look forward to future research findings.