Author: Jessica.F

Reference of 87-13-8, 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. 87-13-8, name is Diethyl 2-(ethoxymethylene)malonate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

2-Phenylaminomethylene-malonic acid diethyl ester: 2-(Ethoxymethylene)-malonic acid diethyl ester (50 mmol) and aniline (50 mmol) are mixed in a flask. The flask is sealed, and the mixture is heated to 1509C in a microwave reactor, stirred for 15 min and then cooled to rt. The crude oil is purified by flash-chromatography (cyclohexane / EtOAc 90 : 10) to yield the title compound in the form of a yellow, viscous oil.

The synthetic route of Diethyl 2-(ethoxymethylene)malonate has been constantly updated, and we look forward to future research findings.

Reference:
Patent; NOVARTIS AG; WO2009/21961; (2009); A1;,
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Application of 4630-80-2,Some common heterocyclic compound, 4630-80-2, name is Methyl cyclopentanecarboxylate, molecular formula is C7H12O2, 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 50-mL glass reactor was charged under dry argon at 0 C with 15 mL of THF, and 20 mmol of magnesium powder, 20 mmol of EtAlCl2, and 1.0 mmol of Cp2TiCl2 were added in succession under stirring. After 1 h, 10 mmol of symmetrical acetylene and 20 mmol of ester were added, and the mixture was heated to 60 C and stirred for 6 h at that temperature. When the reaction was complete, the mixture was cooled to 0 C in a stream of argon, 10-15 mL of diethyl ether was added, and the mixture was hydrolyzed with 5 % aqueous HCl. The organic layer was separated, the aqueous layer was extracted with two portions of diethyl ether, and the combined extracts were washed with a solution of NaHCO3 until neutral washings and dried over MgSO4. The product was isolated by vacuum distillation.

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

Reference:
Article; Khafizova; Shaibakova; Chobanov; Gubaidullin; Tyumkina; Dzhemilev; Russian Journal of Organic Chemistry; vol. 51; 9; (2015); p. 1277 – 1281; Zh. Org. Khim.; vol. 51; 9; (2015); p. 1303 – 1307,5;,
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Adding a certain compound to certain chemical reactions, such as: 1245643-11-1, name is Methyl 3,4-diamino-5-bromobenzoate, belongs to esters-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 1245643-11-1, Safety of Methyl 3,4-diamino-5-bromobenzoate

A 3M aqueous solution of NaOH (11.6 mL; 34.8 mmol) was added to a mixture of intermediates 3a and 3b (4.08 g; 11.6 mmol) in EtOH (60 mL) and THF (60 mL). The reaction mixture was stirred at rt overnight and evaporated under vacuum. The residue was acidified with a 0.5 N aqueous solution of HC1 to give a precipitate. The solid was filtered off, washed with water, then diethylether and dried under vacuum to give 3.86 g (99%o, yellow solid) of intermediate 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, Methyl 3,4-diamino-5-bromobenzoate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; ANGIBAUD, Patrick, Rene; QUEROLLE, Olivier, Alexis, Georges; BERTHELOT, Didier, Jean-Claude; MEYER, Christophe; WILLOT, Matthieu, Philippe, Victor; MEERPOEL, Lieven; JOUSSEAUME, Thierry, Francois, Alain, Jean; (114 pag.)WO2018/178280; (2018); 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. 75567-84-9, name is Methyl 3-(4-bromophenyl)propanoate, A new synthetic method of this compound is introduced below., Product Details of 75567-84-9

According to the following scheme, electrochromic compound 8 was synthesized.The flask was charged with the above intermediate 2-1 (3.92 g, 10 mmol), methyl 3- (4-bromophenyl) propionate (4.86 g, 20 mmol), sodium tert-butoxide (3.84 g, 40 mmol), palladium (67 mg, 0.3 mmol), and tri-tert-butylphosphonium tetrafluoroborate (261 mg, 0.9 mmol), and after purging with argon gas, ortho-xylene (40 mL) degassed with argon gas was added, And the mixture was heated and stirred at 115 C. for 3 hours. The reaction solution was returned to room temperature and filtered through Celite. Next, the filtrate was concentrated and purified by silica gel column chromatography (stationary phase: neutral silica gel, mobile phase: toluene) to obtain Intermediate 8-1 as a pale yellow solid (yield 5.23 g , Yield 73%).

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; RICOH COMPANY LIMITED; GOTO, DAISUKE; SAGISAKA, TOSHIYA; YAMAMOTO, SATOSHI; KANEKO, FUMINARI; INOUE, MAMIKO; YASHIRO, TOHRU; YUTANI, KEIICHIRO; NAGAI, KAZUKIYO; SHIMADA, TOMOYUKI; SHINODA, MASATO; (45 pag.)JP2016/138067; (2016); A;,
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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. 18595-18-1, name is Methyl 3-amino-4-methylbenzoate, This compound has unique chemical properties. The synthetic route is as follows., Quality Control of Methyl 3-amino-4-methylbenzoate

Methyl-3-amino-4-methyl benzoate (50 g), cyanamide (42 g) was added to ethanol (300 rnL) in a round bottom flask at 25-35C. Concentrated hydrochloric acid (21.2 mL) was added to the reaction mass in a drop-wise manner at 25-35C under nitrogen atmosphere. The reaction mass was heated to 80-85C and, stirred for 6 hours. Then thereaction mass was concentrated under vacuum at less than 50C, then cooled to25-35C. Water (350 mL) was added to the reaction mass, cooled to 0-5C and stirred for 15 mins. Aqueous sodium nitrate solution (51.5 gin 135 ml of DM water) was added to the reaction mass at 0-5C in 45 rnins. The precipitate formed was filtered, washed with DM water, acetone followed by methyl tert-butylether (MTBE), and dried undervacuum at 50-55C to provide the title compound (47.5 g).

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 18595-18-1.

Reference:
Patent; LAURUS LABS PRIVATE LIMITED; CHAVA, Satyanarayana; GORANTLA, Seeta Rama Anjaneyulu; INDUKURI, Venkata Sunil Kumar; MOTURU, Venkata Rama Krishna Murthy; JAMJANAM, Srivardhana Rao; SELA, Venkata Purushottama Siva Prasad; WO2015/87343; (2015); A2;,
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Application of 3618-04-0, 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. 3618-04-0, name is trans-Ethyl 4-hydroxycyclohexanecarboxylate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Example 3 : 8-(3-(6-methylpyridin-2-yl)-4-(quinoxalin-6-yl)-lH-pyrazol-l-yl)-2- oxaspiro [4.5] decan-1-one; Step 1: ethyl 4-(tert-butyldimethyIsilyloxy)cyclohexanecarboxylate.; [124] tert-Butyldimethylsilyl chloride (3.61 g, 0.0240 mol) was added to a solution of 4- hydroxy-cyclohexanecarboxylic acid ethyl ester (3.44 g, 0.0200 mol; ), and lH-imidazole (3.40 g, 0.0499 mol; ) in N,N-Dimethylformamide (5.0 mL, 0.064 mol). The mixture was stirred at the room temperature for 3 hours. The mixture was partitioned between ethyl acetate and water. The ethyl acetate phase was washed with brine, dried over sodium sulfate, filtered, and then concentrated to give oily crude product. Column chromatography eluting with 0-20% ethyl acetate/hexanes gave 5.5 g (96%) of the title compound as colorless oil. 1H-NMR (300 MHz, CD3Cl) delta 4.12 (m, 2H), 3.72 (m, IH), 2.29 (m, IH), 1.93 (m, 2H), 1.65 (m, 2H), 1.56 (m, 2H), 1.48 (m, 2H), .125 (m, 3H), 0.88 (d, 6H), 0.03 (d, 6H).

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, trans-Ethyl 4-hydroxycyclohexanecarboxylate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; BIOGEN IDEC MA INC.; WO2009/9059; (2009); A1;,
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Reference of 32122-09-1, 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. 32122-09-1, name is Ethyl 2-(benzyloxy)acetate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

In a reaction flask, lithium hexamethyldisilazide (LiHMDS, 1 M in toluene, 330 L, 0.33 mol) was charged followed by addition of anhydrous THF (400 mL). The solution was cooled down to -70 C. gamma-Butyrolactone (28.4 g, 0.33 mol) was added dropwise while the temperature of the reaction was kept at no more than 60 C. Ethyl benzyloxyacetate (50.0 g, 0.26 mol, formula XI, R1 = benzyl, R6 = ethyl) was added dropwise. After the addition, the reaction mixture was stirred at -60 C for 10 min. Ice-cold water (65 mL) was added, followed by addition of concentrated HCl to pH 3. The mixture was warmed to room temperature and the organic layer was collected. The aqueous layer was extracted with ethyl acetate (4×60 mL). The combined organic layers were evaporated and the residue was purified by flash column chromatography to afford 40.0 g (52% yield, based on gamma-butyrolactone) of a compound of formula II, wherein R1 is benzyl.

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, Ethyl 2-(benzyloxy)acetate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Lonza Ltd; The designation of the inventor has not yet been filed; EP2634180; (2013); 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. 7335-27-5, name is Ethyl 4-chlorobenzoate, This compound has unique chemical properties. The synthetic route is as follows., SDS of cas: 7335-27-5

General procedure: To a stirred solution of ethyl benzoate (3 mmol) derivatives in ethanol was added hydrazine-hydrate (5.44 mmol) and refluxed for 6-12 h. The reaction mixture was diluted with ethyl acetate followed by water. The organic layer was dried over sodium sulphate, filtered and evaporated to obtain the respective benzohydrazide derivatives (4a-m)15,16. The yields of the products varied from 80-85 %.

According to the analysis of related databases, 7335-27-5, the application of this compound in the production field has become more and more popular.

Reference:
Article; Prasanna, V. Laxmi; Narender; Asian Journal of Chemistry; vol. 27; 10; (2015); p. 3605 – 3608;,
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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. 23426-63-3, name is Methyl 2-bromo-2-methylpropanoate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. category: esters-buliding-blocks

Step B; 4-Mercapto-2,5-dimethyl-phenol 44 obtained in step A above is dissolved in acetonitrile (30 mL). Powdered cesium carbonate (7.06 g, 21.7 mmol) is added, followed by 2-bromo-2-methyl-propionic acid methyl ester (2.40 mL, 18.5 mmol). The mixture is stirred at rt for 2 h. Filtration and concentration, followed by silica gel chromatography (0-50% ethyl acetate in hexanes) yielded 2-(4-hydroxy-2,5-dimethyl-phenylsulfanyl)-2-methyl- propionic acid methyl ester 45 (0.45 g, 13%) as a white waxy solid: 1H-NMR (400 MHz, CDCl3) delta = 7.17 (s, IH)3 6.65 (s, IH), 5.06 (s, IH), 3.67 (s, 3H), 2.36 (s, 3H), 2.17 (s, 3H), 1.47 (s, 6H). MS calcd. for C13H19O3S (M+H1) 255.1, found 255.1.

The synthetic route of 23426-63-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; IRM LLC; WO2007/56496; (2007); 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. 121-98-2, name is Methyl 4-methoxybenzoate, This compound has unique chemical properties. The synthetic route is as follows., Recommanded Product: 121-98-2

General procedure: A mixture of substrate (1 mmol), CuBr2 (22.4 mg, 10 mol%), LiBr (130.3 mg, 1.5 equiv.), and 0.05 mL of water was placed in a 50 mL stainless steel autoclave equipped with an inner glass tube in room temperature. CO2 (4 MPa) and O2 (1 MPa) were subsequently introduced into the autoclave and the system was heated under the predetermined reaction temperature for 15 min to reach the equilibration. Then the final pressure was adjusted to the desired pressure by introducing the appropriate amount of CO2. The mixture was stirred continuously for the desired reaction time. After cooling, products were diluted with acetone and analyzed by gas chromatograph (Shimadzu GC-2014) equipped with a capillary column (RTX-17 30 m × 25 mum and RTX-wax 30 m × 25 mum) using a flame ionization detector by comparing the retention times of authentic samples. The residue was purified by column chromatography on silica gel (200-300 mesh, eluting with petroleum ether/ethyl acetate from petroleum ether to 50:1) to afford the desired product. The isolated products were further identified with NMR spectra (Bruker 400 MHz) and GC-MS or GCD, which are consistent with those reported in the literature.

According to the analysis of related databases, 121-98-2, the application of this compound in the production field has become more and more popular.

Reference:
Conference Paper; Liu, An-Hua; Ma, Ran; Zhang, Meng; He, Liang-Nian; Catalysis Today; vol. 194; 1; (2012); p. 38 – 43;,
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