Tag: M.W=100-200

Electric Literature of 7223-30-5,Some common heterocyclic compound, 7223-30-5, name is 3-Phenylpropiolamide, molecular formula is C9H7NO, 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 alkynes 1 (0.5 mmol), 2 (0.6 mmol), palladium chloride (3.2 mg, 3 mol %), ionic liquid (0.5 mL), HX (0.25 mL) in a test tube (10 mL) equipped with a magnetic stirring bar. The mixture was stirred under the atmosphere of air at room temperature. After the reaction was completed, 10 mL ethyl acetate (3×10 mL) was added into the tube. The combined organic layers were washed with brine to neutral, dried over MgSO4, and concentrated in vacuum. Purification of the residue on a preparative TLC afforded the desired products. Residual ionic liquid obtained after the workup was stirred with diethyl ether (2×10 mL) for 15 min, and the ethereal layer was decanted. The ionic liquid was then directly used for the next runs without further dry and reused for up to five runs.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3-Phenylpropiolamide, its application will become more common.

Reference:
Article; Li, Jianxiao; Yang, Shaorong; Wu, Wanqing; Qi, Chaorong; Deng, Zhongxian; Jiang, Huanfeng; Tetrahedron; vol. 70; 7; (2014); p. 1516 – 1523;,
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Electric Literature of 7150-72-3, A common heterocyclic compound, 7150-72-3, name is tert-Butyl vinylcarbamate, molecular formula is C7H13NO2, 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 10 mL round-bottomed flask equipped with a rubber septum and a magnetic stir bar was charged with 1 (1.0 equiv), 2 (2.5 equiv), 3 (2.0 equiv), and fac-Ir(ppy)3 (0.01 equiv). The flask was evacuated and backfilled 3 times with N2. DMSO was then added with syringe under N2. The mixture was then irradiated by white LED strips. After completion of the reaction (6 h, as judged by TLC analysis), the mixture was poured into a separatory funnel containing sat. aq NaHCO3 (20mL) and EtOAc (20 mL). After extraction with EtOAc, the organic layer was separated, dried (Na2SO4), and concentrated under reduced pressure after filtration. The crude product was purified by flash chromatography on silica gel to afford the desired product 4.

The synthetic route of 7150-72-3 has been constantly updated, and we look forward to future research findings.

Reference:
Article; An, Xiao-De; Yu, Shouyun; Synthesis; vol. 50; 17; (2018); p. 3387 – 3394;,
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Synthetic Route of 16982-21-1, 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. 16982-21-1 name is Ethyl 2-amino-2-thioxoacetate, 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.

To a 3-neck, 200 mL round bottom flask under nitrogen was added 3-bromo-2-oxopropanoic acid (5 g, 30 mmol) and anhydrous 1,4-dioxane (50 mL). To this mixture was added ethyl 2-amino-2-thioxoacetate (4.1 g, 31 mmol) and the mixture heated at 50 C. for 1.5 h. The reaction was concentrated to dryness, the residue was dissolved in saturated aqueous NaHCO3 (100 mL) and water (100 mL), and the aqueous solution extracted with ethyl acetate (4 ×100 mL). The aqueous layer was acidified to pH 2 with concentrated HCl. After precipitate formation (20 min) the aqueous mixture was extracted with ethyl acetate (3×100 mL). The combined organic layers were dried over anhydrous sodium sulfate and concentrated to dryness to give the title compound as a red solid, which was used in next step without further purification.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, Ethyl 2-amino-2-thioxoacetate, and friends who are interested can also refer to it.

Reference:
Patent; Janssen Pharmaceutica NV; Goldberg, Steven; McClure, Kelly; Tanis, Virginia M.; Fennema, Elizabeth G.; Lebsack, Alec D.; Martin, Connor L.; Venkatesan, Hariharan; Xue, Xiaohua; Woods, Craig R.; (531 pag.)US2017/313691; (2017); A1;,
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Application of 2675-89-0, 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 2675-89-0 as follows.

To a suspension of NaH (344 mg, 60% dispersion in mineral oil) in THF (17 mL) was added allyl alcohol (2) (500 mg, 8.6 mmol) at 0 C. After 1 h at the same temperature, chloroacetamide 1 (0.97 mL, 9.5 mmol) was added and the mixture was stirred for 24 h. The mixture was quenched with saturated aqueous NH4Cl and concentrated at reduced pressure. The resulting residue was dissolved in EtOAc and washed with water and brine. The organic layer was dried over anhydrous MgSO4 and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel (hexanes/EtOAc, 3:1) to give 6a (1.05 g, pale yellow oil) in 85% yield.

According to the analysis of related databases, 2675-89-0, the application of this compound in the production field has become more and more popular.

Reference:
Article; Yun, Jeong In; Kim, Hyoung Rae; Kim, Sang Kyum; Kim, Deukjoon; Lee, Jongkook; Tetrahedron; vol. 68; 4; (2012); p. 1177 – 1184;,
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Synthetic Route of 116861-31-5, These common heterocyclic compound, 116861-31-5, name is tert-Butyl (3-chloropropyl)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.

EXAMPLE 1 5-[(tert-butoxy)carbonyl]amino-2-ethoxycarbonyl-pentanoic acid ethyl ester (I: R1 =R2 =Et; R=–(CH2)3 –NHY; Y=Boc) Sodium metal (2.5 g, 0.1 mol) is dissolved in absolute ethyl alcohol (70 ml) while keeping the reaction mixture under nitrogen atmosphere. The temperature is then brought to 60 C. and malonic acid di-ethyl ester (35 g, 0.2 mol) is gradually dripped in. N-[(tert-butoxy)carbonyl]-3-chloro-propylamine (12.2 g, 0.1 mol) is gradually added, at room temperature, to the resulting solution. Stirring is continued at room temperature for 2 hours and then at the reflux temperature for 6 hours. The reaction mixture is poured into an ethyl acetate/water (1/1, v/v) mixture (400 ml) and the organic phase is recovered, washed several times with water and dried over MgSO4. The organic solvent is removed under vacuum (0.5 mBar) at 100 C., yielding a pale yellow oil (27.7 g, 87%), N.M.R. analysis of this product confirms the assigned structure.

The synthetic route of 116861-31-5 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Eniricerche S.p.A.; Sclavo S.p.A.; US4914226; (1990); A;,
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Application of 121492-06-6,Some common heterocyclic compound, 121492-06-6, name is N-Boc-(2-Aminoethyl)-N-methylamine, molecular formula is C8H18N2O2, 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 mixture of tert-butyl 2-aminoethyl(methyl)carbamate (17.68 mg, 0.101 mmol), Hunig’sBase (0.053 mL, 0.304 mmol) and DMAP (1.240 mg, 10.15 muiotaetaomicron) in DCM (1 mL) was added methyl 4-((lR,3aS,5aR,5bR,7aR,l laS,l lbR,13aR,13bR)-3a- (chlorocarbonyl)-5a,5b,8,8,l la-pentamethyl-l-(prop-l-en-2-yl)- 2,3,3a,4,5,5a,5b,6,7,7a,8,l l,l la,l lb,12,13,13a,13b-octadecahydro-lH- cyclopenta[a]chrysen-9-yl)benzoate (60 mg, 0.101 mmol) in DCM (1 mL). The reaction mixture was stirred for 1 hour. LCMS indicated the formation of desired product. The reaction mixture was quenched with distilled water, extracted with DCM (3 x 3 mL). All the extracts were combined, dried over sodium sulfate, filtered and concentrated under reduced pressure to provide the desired product as white solid (65 mg, 88%). LCMS: m/e 729.61 (M+H)+, 2.72 min (method 1).

The synthetic route of 121492-06-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; REGUEIRO-REN, Alicia; LIU, Zheng; SWIDORSKI, Jacob; MEANWELL, Nicholas A.; SIT, Sing-Yuen; CHEN, Jie; CHEN, Yan; SIN, Ny; WO2011/153319; (2011); A1;,
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Reference of 4141-08-6, 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. 4141-08-6 name is 2-Amino-N-methylbenzamide, 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.

To a solution of 2-amino-N-methylbenzamide 15.00g(0.1mol) and triethylamine 12.10g(0.12mol) in 150 mL dichloromethane was added 12.40g(0.11mol) chloroacetyl chloride in 30mL dichloromethane at room temperature for 0.5 hours. Then the reaction mixture was continued stirring at room temperature for another 2-3 hours and monitored by TLC. After the reaction was over, the mixture was concentrated under reduced pressure, the residual was filtered and washed with 50ml of 10% diluted hydrochloric acid, 50ml of saturated sodium bicarbonate solution, 50ml of water and 50ml of petroleum ether successively, then dried to give 18.90g intermediate 2-(2-chloroacetamido)-N-methylbenzamide as white solid with yield of 83.4%, m.p. 155-157C.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 2-Amino-N-methylbenzamide, and friends who are interested can also refer to it.

Reference:
Patent; Sinochem Corporation; Shenyang Research Institute of Chemical Industry Co., Ltd.; REN, Lanhui; LIU, Changling; WANG, Lizeng; LI, Zhinian; SUN, Xufeng; LAN, Jie; WU, Qiang; CHI, Huiwei; EP2636669; (2013); A1;,
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Adding a certain compound to certain chemical reactions, such as: 63920-73-0, name is 2-Amino-4,6-dimethoxybenzamide, belongs to amides-buliding-blocks 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 63920-73-0, Product Details of 63920-73-0

Example 26. Preparation of 2-[4-(5,7-Dimethoxy-4-oxo-3,4-dihydro-quinazolin-2-yl)-2,6-dimethyl-phenoxy]-N-(4-methoxy-phenyl)-acetamide [0257] To a solution of 4-hydroxy-3,5-dimethyl-benzaldehyde (9.00 g, 60.0 mmol) in ethanol (300 mL) were added potassium carbonate (24.9 g, 180 mmol) and methyl bromoacetate (11.4 mL, 120 mmol). The reaction mixture was stirred at 95C under nitrogen for 16 hours. The mixture was concentrated to dryness under reduced pressure. Water (150 mL) and 1 N NaOH solution (90 mL) were added to the residue. The mixture was stirred at room temperature for 30 minutes, then washed with ether. Concentrated HCI was added slowly to the aqueous solution until a large amount of white precipitate formed. The solid was filtered, washed with water, and air-dried, to give (4-formyl-2,6-dimethyl-phenoxy)- acetic acid as a white solid. Yield: 11.1 g (89%).[0258] To a solution of (4-formyl-2,6-dimethyl-phenoxy)-acetic acid (3.12 g, 15.0 mmol) and 2-amino-4,6-dimethoxy-benzamide (2.94 g, 15.0 mmol) in N,N-dimethylacetamide (50 mL) were added sodium hydrogen sulfite (58.5 wt%, 3.02 g, 16.5 mmol) and p-toluenesulfonic acid monohydrate (0.285 g, 1.50 mmol). The reaction mixture was stirred at 1200C for 17 hours under nitrogen and cooled to room temperature. The precipitate was filtered, washed with water, then methanol, and air-dried to give 1.29 g [4-(5,7-dimethoxy-4-oxo-3,4-dihydro-quinazolin-2-yl)-2,6-dimethyl-phenoxy]-acetic acid. The filtrate was concentrated to dryness and water was added. The suspension was stirred for 30 minutes and filtered. The solid was washed with water, then methanol. After air drying, 3.78 g more [4-(5,7-dimethoxy-4-oxo-3, 4-dihydro-quinazolin-2-yl)-2,6-dimethyl-phenoxy]- acetic acid was obtained. Yield: 5.07 g (88%).[0259] To a mixture of [4-(5,7-dimethoxy-4-oxo-3,4-dihydro-quinazolin-2-yl)-2,6-dimethyl-phenoxy]-acetic acid (0.400 g, 1.04 mmol), 1-ethyl-3-(3′-dimethylaminopropyl)carbodiimide hydrochloride (EDCI; 0.240 g, 1.24 mmol), 1-hydroxybenzotriazole hydrate (HOBt; 0.17 g, 1.24 mmol) in DMF (10 ml_) was added 4-methylmorpholine (0.20 mL, 1.8 mmol). After 10 minutes, p-anisidine (0.26 g, 2.08 mmol) was added. The mixture was stirred at room temperature under nitrogen for 2.5 days. The solvent was removed under reduced pressure. Water was added, stirred for 30 minutes. The solid was filtered, washed with water, and dried in air. The crude product was purified by column chromatography (silica gel, 230-400 mesh; 5% MeOH in CH2CI2 as eluent). The product fractions were combined, concentrated to dryness. The solid was dissolved in small amount of dichloromethane, precipitate out by adding ether. The precipitate was filtered, washed with ether, dried under vacuum to afford the title compound as a white solid. Yield: 0.26 g (51%). 1H NMR (400 MHz, CDCI3): delta 10.30 (br s, 1 H), 8.52 (s, 1 H), 7.83 (s, 2H), 7.58 (dd, J = 6.8 and 2.0 Hz, 2H), 6.93 (dd, J = 6.8 and 2.0 Hz, 2H), 6.84 (d, J = 2.4 Hz, 1 H), 6.48 (d, J = 2.0 Hz, 1 H), 4.44 (s, 2H), 3.97 (s, 3H), 3.94 (s, 3H), 3.83 (s, 3H), 2.42 (s, 3H). MS (ES+) m/z: 490.55 (M+1).

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Reference:
Patent; RESVERLOGIX CORP.; HANSEN, Henrik, C.; WAGNER, Gregory, S.; ATTWELL, Sarah, C.; MCLURE, Kevin, G.; KULIKOWSKI, Ewelina, B.; WO2010/123975; (2010); 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. 37394-93-7, name is 2-Chloro-N-(o-tolyl)acetamide, A new synthetic method of this compound is introduced below., name: 2-Chloro-N-(o-tolyl)acetamide

General procedure: General procedure.A mixture of 4 (4.59 g, 0.01 mol) and 2-chloro-N-substitutedacetamide derivatives (0.01 mol) in dry acetone (30 mL) andanhydrous K2CO3 (1.38 g, 0.01 mol) was stirred at room temperaturefor 8 h, filtered and the solid product formed was crystallizedfrom ethanol to give 5-18.

The synthetic route of 37394-93-7 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Bua, Silvia; Ghorab, Mostafa M.; Soliman, Aiten M.; Supuran, Claudiu T.; European Journal of Medicinal Chemistry; vol. 200; (2020);,
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Synthetic Route of 70-55-3, The chemical industry reduces the impact on the environment during synthesis 70-55-3, name is 4-Methylbenzenesulfonamide, I believe this compound will play a more active role in future production and life.

A solution of 4-(bromomethyl) owing procedure. 4-Methylbenzenesulfonamide (0.5 g, 2.92 mmol) was dissolved in chloroform (10 mL) and N-bromosuccinimide (0.546 g, 3.07 mmol) and benzoyl peroxide (0.035 g, 0.146 mmol) were added and the reaction was heated overnight at 63 °C. The succinimide crystallized out at room temperature to afford a crude solution of 4- (bromomethyl)benzenesulfonamide.

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, 4-Methylbenzenesulfonamide, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY DEVELOPMENT LIMITED; ADAMS, Nicholas David; BENOWITZ, Andrew B.; RUEDA BENEDE, Maria Lourdes; EVANS, Karen Anderson; FOSBENNER, David T.; KING, Bryan Wayne; LI, Mei; MILLER, William Henry; REIF, Alexander Joseph; ROMERIL, Stuart Paul; SCHMIDT, Stanley J.; WIGGALL, Kenneth; (1283 pag.)WO2017/216726; (2017); A1;,
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