Category: 18595-18-1

18595-18-1, The chemical industry reduces the impact on the environment during synthesis 18595-18-1, name is Methyl 3-amino-4-methylbenzoate, I believe this compound will play a more active role in future production and life.

j00646j A solution of methyl 3-amino-4-methylbenzoate (25 g, 151 mmol) in ethanol (62 mL) was charged with 70% conc. HNO3 (9.5 g, 151 mmol) and solution of cyanamide (9.5 g, 227 mmol) in water (25 mL) at room temperature. The resulting solution was heated to 90Cfor 16 h. The reaction mixture was cooled to room temperature, diluted with ethyl acetate (100 mL) and stirred for 30 mm. The solid precipitated out was filtered, washed with ethyl acetate:diethyl ether and dried to give 28.6 g, 70% yield of the title compound as yellow solid. ?H NMR (400 MHz, DMSO-d6): oe = 9.33 (br. s, 1 H), 7.87 (dd, J= 7.94, 1.32 Hz, 1 H), 7.75 (d, J = 1.32 Hz, 1 H), 7.51 (d, J= 8.38 Hz, 1 H), 7.30 (s, 4 H), 3.86 (s, 3 H), 2.28 (s, 3 H); MS (ESj:m/z = 208.15 [M+H], 249 [M+ACN] LCMS: tR = 0.71, 0.79 mm.

The chemical industry reduces the impact on the environment during synthesis Methyl 3-amino-4-methylbenzoate. I believe this compound will play a more active role in future production and life.

Reference:
Patent; COFERON, INC.; FOREMAN, Kenneth, W.; JIN, Meizhong; WANNER, Jutta; WERNER, Douglas, S.; WO2015/106292; (2015); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

18595-18-1, A common compound: 18595-18-1, name is Methyl 3-amino-4-methylbenzoate, belongs to esters-buliding-blocks compound, it can change the direction of chemical reaction, and react with certain compounds to generate new functional products. A new synthetic method of this compound is introduced below.

The requisite 4-methyl-3-(pyridine-4-carbonylarnino)benzoic acid starting material (Step3) was prepared as follows: Step 1: Preparation of methyl 4-methyl-3-(pyridine-4-carbonylamino)benzoate; A solution of methyl 3-amino-4-methyl-benzoate (8.255 g, 50 mmol) and TEA (13.9 mL, 100 mmol, 2 eq) in DCM (200 mL) was cooled in an ice-bath and pyridine-4-carbonyl chloride (9.795 g, 55 mmol, 1.1 eq) was added portionwise as a solid. The reaction mixture was stirred for 30 mins, the ice-bath was removed, and stirring continued for a further 1 hr. Extra acid chloride (2 g, 0.2 eq) was added and the reaction mixture stirred a further 1 hr. It o was then diluted with more DCM and the resulting solution washed sequentially with water (twice), saturated sodium bicarbonate solution, and brine. At this stage a solid started to precipitate out, so more DCM was added. The solid precipitate (2 g) was isolated by titration and the filtrate dried (PS Paper) and evaporated to give a solid (10.7 g). The two fractions were identical (NMR, LCMS) and combined to give the title compound (12.7 g) 5 as a yellow solid, 1H NMR (400.132 MHz, DMSO) 62.33 (s, 3H),3.86 (s, 3H),7.46 (d, 1H),7.79 (d, 1H),7.87 -7.94 (m, 2H),7.98 – 8.05 (m, 1H),8.81 (d, 2H),10.35 (s, IH), m/z 271 (M+H+) 269 (M-H”).

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, Methyl 3-amino-4-methylbenzoate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2008/59214; (2008); A1;,
Ester – Wikipedia,
Ester – 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. 18595-18-1, name is Methyl 3-amino-4-methylbenzoate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. 18595-18-1

Example 1 A Preparation of 4-(1-(2-chloro-6-(trifluoromethyl)benzoyl)-6-(dimethylcarbamoyl)-1H- indazol-3-yl)cyclohex-3-enecarboxylic acid (1A) Step 1: Preparation of methyl 1H-indazole-6-carboxylate (A-2). Methyl 3-amino-4-methylbenzoate (A-l) (5.0 g, 30.2 mmol) was dissolved in AcOH (140 mL). Sodium nitrite (2.1 g, 30.2 mmol) in water (3.5 mL) was added drop-wise to the solution of starting material under ice-cooling at room temperature. The ice bath was removed and the mixture was stirred overnight. The half of the solvents were evaporated, the mixture was diluted with water (80 mL) and extracted with EtOAc(3×30 mL). The collected organic phase was washed with water and brine (2×200 mL), dried and evaporated to afford 2 (4.4 g), yield 83%. LCMS (ESI): calc’d for C9H8N202, [M+H]+: 177, found: 177.

The synthetic route of 18595-18-1 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; MERCK SHARP & DOHME CORP.; BARR, Kenneth Jay; MACLEAN, John; ZHANG, Hongjun; BERESIS, Richard Thomas; ZHANG, Dongshan; WO2014/26328; (2014); A1;,
Ester – Wikipedia,
Ester – 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. 18595-18-1, name is Methyl 3-amino-4-methylbenzoate, A new synthetic method of this compound is introduced below., 18595-18-1

Method 18 4-Methyl-3-[(3-methyl-4-oxo-3,4-dihydroquinazolin-6-yl)amino]benzoic acid A mixture of methyl 3-amino-4-methyl benzoate (1.00 g, 6.06 mmol) and 6-bromo-3-methylquinazolin-4(3H)-one (Method 1; 1.45 g, 6.06 mmol)) and KO-t-Bu (1.6 g, 15.15 mmol) in 1,4-dioxane (20 ml) was treated with Pd2(dba)3 (10% mol) and BINAP (20% mol). The reaction mixture was stirred at 80 C. for 5 h. The reaction was cooled to 25 C. and then filtered. The solid was washed with methanol-EtOAc (1:1), and collected by vacuum filtration. The resulting solid was refluxed in methanol and again filtered. The filtrate was concentrated to 40 ml. Upon cooling to 25 C., a precipitate formed which was collected by vacuum filtration. (723 mg). The product was then purified by reverse phase preparative HPLC (0.1% TFA in acetonitrile and water) to give the desired product (7%). NMR: 8.35 (s, 1H); 8.10 (s, 1H); 7.93 (s, 1H); 7.71 (m, 2H); 7.52 (m, 2H); 7.35 (d, 1H); 3.60 (s, 3H); 2.35 (s, 3H); m/z 309.

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; ASTRAZENECA AB; US2009/170849; (2009); A1;,
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics