Month: August 2021

Synthetic Route of 3144-09-0, 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. 3144-09-0 name is Methylsulfonamide, 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.

8.4 g (0.02 mol) of 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino] butyloxy} acetic acid and 60 mL of dichloromethane were added into a 100 mL flask and cooled to 5 C., 3.8 g (0.03 mol) of oxalyl chloride was added dropwise, then reacted at room temperature for 2 hours, the solvent was concentrated to dryness, 50 mL of acetonitrile was added to dissolve, and the X4 solution was obtained as a stand-by. (0077) 2.85 g of methanesulfonamide, 20 mL of acetonitrile and 3 g of triethylamine were added into another flask and cooled to 10 C., the X4 solution obtained above was added dropwise, then reacted at this temperature for 5 hours, until the reaction was completed. (0078) The finished reaction solution was poured into 100 mL of ice water, the mixture was extracted with ethyl acetate, the solvent of the organic phase was concentrated to dry, the residue was recrystallized with ethanol, and 8.8 g off-white crystals of NS-304 was obtained, the molar yield was 88%, HPLC purity was 99.5%. (0079) 1H-NMR data: 1H-NMR (400 MHz, CDCl3) delta: 8.19 (s, 1H), 7.44 (m, 2H), 7.35 (m, 2H), 7.30-7.21 (m, 6H), 3.97 (s, 2H), 3.59 (t, J=6.0 Hz, 2H), 3.45 (t, J=6.8 Hz, 2H), 3.29 (s, 3H), 1.75-1.70 (m, 4H).

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

Reference:
Patent; Seasons Biotechnology (Taizhou) Co., Ltd.; TANG, Fanghui; MA, Chi; JIA, Qiang; (11 pag.)US2018/29998; (2018); A1;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Application of 39549-79-6,Some common heterocyclic compound, 39549-79-6, name is 2-Amino-4-methylbenzamide, molecular formula is C8H10N2O, 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 12mL vial was charged with MCM-41-2P-Pd(OAc)2 (2molpercent), 2-aminobenzamide (1mmol), aryl iodide (1mmol) (if solid) and a stirring bar. Then, DMF (2mL), aryl iodide (1mmol) (if liquid) and DBU (2mmol) were injected by syringe under an argon atmosphere. The vial was placed in an alloy plate, which was transferred into a 300mL Parr Instruments 4560 series autoclave under an argon atmosphere. After flushing the autoclave three times with CO, a pressure of 10bar CO was fixed at ambient temperature. The autoclave was heated for 20hat 120°C. After completion of the reaction, the autoclave was cooled to room temperature and the pressure was released carefully. The reaction mixture was diluted with ethyl acetate (10mL) and filtered. The palladium catalyst was washed with distilled water (2×5mL) and acetone (2×5mL), and reused in the next run. The filtrate was concentrated in vacuo and the pure product was isolated by either washed with water, ethyl acetate and finally hexane or recrystallization from MeOH.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Amino-4-methylbenzamide, its application will become more common.

Reference:
Article; You, Shengyong; Huang, Bin; Yan, Tao; Cai, Mingzhong; Journal of Organometallic Chemistry; vol. 875; (2018); p. 35 – 45;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Electric Literature of 17641-08-6,Some common heterocyclic compound, 17641-08-6, name is 2-Chloro-N-(3-methoxyphenyl)acetamide, molecular formula is C9H10ClNO2, 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 oxime 6 or 8 (0.7 mmol) and K2CO3(0.116 g, 0.84 mmol) were taken in dry DMF (5 mL), cooled to 0 Cand stirred for 30 min, then N-substituted acetamide (0.77 mmol)was added. The total reaction mixture was stirred at room temperature for 12-20 h. The reaction was monitored by TLC and after completion of the reaction, treated with ice cold water. Aqueous solution was extracted thrice with ethylacetate, combined extracts were washed with water till washings are neutral to pH, dried over anhydrous sodium sulfate and concentrated. The residue was purifiedby passing through a column packed with silica gel using petroleum ether/EtOAc (8:2) as eluent.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Chloro-N-(3-methoxyphenyl)acetamide, its application will become more common.

Reference:
Article; Gannarapu, Malla Reddy; Vasamsetti, Sathish Babu; Punna, Nagender; Royya, Naresh Kumar; Pamulaparthy, Shanthan Rao; Nanubolu, Jagadeesh Babu; Kotamraju, Srigiridhar; Banda, Narsaiah; European Journal of Medicinal Chemistry; vol. 75; (2014); p. 143 – 150;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Reference of 672-58-2,Some common heterocyclic compound, 672-58-2, name is 3-(Trifluoromethyl)benzenesulfonamide, molecular formula is C7H6F3NO2S, 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: In 25ml RB flask to a solution of Compound 9 (200 mg) in dry DMF (5ml), EDCI (250 mg, 1.25eq) and DMAP (130 mg,1eq) were added followed by addition of Sulfonamide (1eq). RM was stirred at RT for 4hrs. Solvent from the reaction mixture was evaporated. To the residue water was added and acidified with 6N HCl, solid precipitated out. Solid was filtered and dried. Crude solid was purified by flash chromatography eluating with 4-8% MeOH/DCM as solvent system to give pure product.

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

Reference:
Article; Patil, Vikas; Kale, Manoj; Raichurkar, Anandkumar; Bhaskar, Brahatheeswaran; Prahlad, Dwarakanath; Balganesh, Meenakshi; Nandan, Santosh; Shahul Hameed; Bioorganic and Medicinal Chemistry Letters; vol. 24; 9; (2014); p. 2222 – 2225;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

54616-47-6, name is 2-Bromo-N,N-dimethylbenzamide, belongs to amides-buliding-blocks compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. Formula: C9H10BrNO

General procedure: To a stirred solution of 1 (0.23 g, 1.0 mmol) in THF (6 mL) at -78C was added n-BuLi (1.6 M in hexane; 1.0 mmol) dropwise. After 15 min, PhNCS(0.14 g, 1.0 mmol) was added and stirring was continued for an additional 5 min before addition of saturated aqueous NH4Cl (15 mL). The mixture was extracted with AcOEt (3 × 10 mL), and the combined extracts were washed with brine (10 mL), dried (Na2SO4) and concentrated by evaporation

The synthetic route of 54616-47-6 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Kobayashi, Kazuhiro; Shigemura, Yuuho; Fujiwara, Daiki; Heterocycles; vol. 94; 6; (2017); p. 1152 – 1158;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

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. 22961-58-6, name is 5-Amino-2-methoxybenzamide belongs to amides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Quality Control of 5-Amino-2-methoxybenzamide

EXAMPLE 67 3′-Methoxy-2′-methylcarbamoyloxanilic acid ethyl ester. 72 Slow addition of 4.98 g. (0.03 mole) of 5-amino-o-anisamide to a mixture of 57% NaH (1.32 g., 0.0315 mole) in 50 ml. dimethylformamide was carried out at room temperature. After the evolution of H2 ceased, the mixture was cooled to 3 C. and 2.06 ml. (0.033 mole) of methyliodide was slowly added at 3-5 C. The temperature was allowed to go up to room temperature and stir for 2 hours. The mixture was concentrated, the residue extracted into ethylacetate-water, the mixture was basified, and the ethylacetate layer was washed with water, brine and dried. Concentration gave a tan solid that was crystallized (ethanol), giving 0.45 g. (8%) of 6-amino-N-methyl-o-anisamide mp. 186-189 C.

The synthetic route of 22961-58-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; American Home Products Corporation; US4054661; (1977); A;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Adding a certain compound to certain chemical reactions, such as: 57957-24-1, name is N-(1-Phenylvinyl)acetamide, 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 57957-24-1, Safety of N-(1-Phenylvinyl)acetamide

General procedure: A reaction tube was charged with N-acetylenamide 1a (100 mg, 0.636 mmol), alkyne 2a (124 mg, 0.699 mmol), Cu(OAc)2.H2O (126 mg, 0.636 mmol), KPF6 (23.4 mg, 0.127 mmol) and [RuCl2(p-cymene)]2 (7.8 mg, 0.0127 mmol). To that, DME or water (3 mL) was added by syringe. The reaction mixture was stirred at 110 C under N2 as indicated time in the table 1.The reaction mixture was cooled down to rt, diluted with 10 mL of DCM. The mixture was then filtered through Celite. The combined organic portion was washed with water, then dried over MgSO4 and concentrated under reduced pressure. The crude product was purified by column chromatography on silica gel with hexane/ethyl acetate as eluent to yielded the desired pyrrole 3a (202 mg, 0.605 mmol) in 95% yield. Products obtained in this work were characterized by spectral methods particularly with 1H, 13C NMR, and ESI-Mass analyses, further, the data were compared with those reported.

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, N-(1-Phenylvinyl)acetamide, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Murugan, Kaliyappan; Liu, Shiuh-Tzung; Tetrahedron Letters; vol. 54; 21; (2013); p. 2608 – 2611;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Synthetic Route of 53844-02-3, 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. 53844-02-3, name is Benzyl (2-bromoethyl)carbamate, This compound has unique chemical properties. The synthetic route is as follows.

Sodium hydride (60%, 120mg, 3.0mmol) was added to a solution of 2-tert-butoxycarbonylamino-3-fluorobenzoic acid methyl ester from Example 20A (750mg, 2.8mmol) in DMF (8.0ml) while cooling in an ice/water bath. The mixture was allowed to warm to room temperature and stirred for 30min. (2-bromoethyl)carbamic acid benzyl ester (360mg, 2.8mmol) and sodium iodide (420mg, 2.8mmol) were added and the mixture was heated at 65C for 18h. The mixture was cooled and evaporated in vacuo. The residue was partitioned between EtOAc and brine and the organic layer was dried and evaporated in vacuo. The residue was purified by flash chromatography on silica (EtOAc:pet. ether 30:70) to give a colourless gum; yield 340mg, 27%.

The chemical industry reduces the impact on the environment during synthesis Benzyl (2-bromoethyl)carbamate. I believe this compound will play a more active role in future production and life.

Reference:
Patent; FERRING B.V.; WO2006/18443; (2006); A1;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

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. 459817-82-4, name is tert-Butyl 1,2,3-oxathiazolidine-3-carboxylate 2,2-dioxide, This compound has unique chemical properties. The synthetic route is as follows., Safety of tert-Butyl 1,2,3-oxathiazolidine-3-carboxylate 2,2-dioxide

Example 10 (2S)-1-{[2-(5-Brom-2,3-dihydro-indol-1-yl)-ethylamino]-acetyl}-pyrrolidine-2-carbonitrile, Hydrochloride Salt This compound was made from 5-brom-2,3-dihydroindole, 2,2-dioxo-[1,2,3]oxathiazolidine-3-carboxylic acid tert-butyl ester according to example 5, steps A] to C]. The hydrochloride salt of the title compound was obtained according to example 2. MS (ISP): 399.3 (MNa+), 377.3 (MH+). 1H-NMR (DMSO-d6): 2.05 (m, 2H), 2.17 (m, 2H); 2.94 (t, 2H), 3.16(m, 2H), 3.38 (m, 5H), 3.60 (m, 1H), 4.00-4.30 (m, 5H), 4.85 (t, 1H), 6.55 (d, 1H), 7.20 (d, 2H), 7.21 (s, 1H), 9.10 (broad s, 2H). (+Rotamer).

According to the analysis of related databases, 459817-82-4, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Boehringer, Markus; Hunziker, Daniel; Kuehne, Holger; Loeffler, Bernd M.; Sarabu, Ramakanth; Wessel, Hans P.; US2003/130281; (2003); A1;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

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. 39549-79-6, name is 2-Amino-4-methylbenzamide, A new synthetic method of this compound is introduced below., Quality Control of 2-Amino-4-methylbenzamide

General procedure: Sodium hydrogen sulfite (4 mmol) was added to a solution of anthranilamide 1 (2 mmol) and benzaldehyde 2 (2 mmol) in N,N- dimethylacetamide (5 mL). The mixture was heated under continuous stirring at 150 o C for 2-3 h and poured into ice water. The precipitate was then filtered, washed with water followed byethanol, and dried to yield the 2-arylquinazolinones 3-31.#10;#10;

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; Khadka, Daulat Bikram; Tran, Giap Huu; Shin, Somin; Nguyen, Hang Thi Minh; Cao, Hue Thi; Zhao, Chao; Jin, Yifeng; Van, Hue Thi My; Chau, Minh Van; Kwon, Youngjoo; Le, Thanh Nguyen; Cho, Won-Jea; European Journal of Medicinal Chemistry; vol. 103; (2015); p. 69 – 79;,
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics