Tag: M.W=100-200

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. 89-91-8, name is Methyl 2,2-dimethoxyacetate, A new synthetic method of this compound is introduced below., Formula: C5H10O4

Preparation of substituted 3-hydroxy isoquinolines were carried out in the manner described in Fukumi, H.; Kurihara, H.; Heterocycles., 1978, 9(9), 1197-1205. Thus, a mixture of 4-methyl benzylamine (5.54 g, 45.7 mmol) and methyl dimethoxyacetate (6.17 mL, 50.3 mmol) was heated to 130 C. where it stirred for 4 h. After this time, the volatiles were removed under reduced pressure to provide a residue. The residue was azeotroped to dryness from toluene to provide the product, which was used directly in the next step without further purification. MS (E+) m/z: 224 (MH+); LC retention time (Method A): 2.49 min.

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; Weinstein, David S.; Gilmore, John L.; Sheppeck, James; Yang, Bingwei Vera; Kim, Soong-Hoon; Vaccaro, Wayne; US2005/187242; (2005); 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. 35418-07-6, name is Methyl 3-(4-aminophenyl)propanoate, A new synthetic method of this compound is introduced below., SDS of cas: 35418-07-6

Example 13; Propionic Acid Ester Analogue (18) of Am-580; A solution of the compound 17 (39 mg, 0.168 mmol) in benzene (2.5 ml) was added with thionyl chloride (122 mul, 1.67 mmol) and DMF (1 drop), and the mixture was refluxed by heating for 1 hour. Volatile substances were evaporated, then the residue was added with benzene (3 ml), the solvent was evaporated again, and the residue was dried under reduced pressure. A solution of this residue in dichloromethane (1 ml) was cooled on ice, and added with a solution of methyl 3-(4-aminophenyl)propionate (36 mg, 0.201 mmol) and triethylamine (117 mul, 0.841 mmol) in dichloromethane (2 ml), and the mixture was stirred at 0 C. for 30 minutes, and at room temperature for further 16 hours. The reaction mixture was added with saturated aqueous sodium hydrogencarbonate, and extracted with ethyl acetate. The organic layer was washed with water, and dried over anhydrous sodium sulfate, and then the solvent was evaporated. The residue was purified by silica gel column chromatography (eluted with chloroform), and the residue was recrystallized to obtain the title compound 18 (55 mg, 83%) together with the recovered compound 17 (6 mg, 15%).Compound 18: colorless needles, melting point: 118.5-119.5 C. (dichloromethane-hexane)MS (m/z): 393 (M+, 15), 249 (4), 215 (100), 172 (5), 157 (10), 91 (6), 43 (9)IR (KBr) cm-1: 1731, 16381H-NMR (CDCl3) delta: 1.29 (6H, s), 1.30 (6H, s), 1.70 (4H, s), 2.61 (2H, t, J=8 Hz), 2.92 (2H, t, J=8 Hz), 3.66 (3H, s), 7.17 (2H, A2B2, J=8.5 Hz), 7.36 (1H, d, J=8 Hz), 7.55 (1H, dd, J=8, 2 Hz), 7.56 (2H, A2B2, J=8.5 Hz), 7.86 (1H, d, J=2 Hz), 7.99 (1H, br s, CONH)

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; RESEARCH FOUNDATION ITSUU LABORATORY; US2010/286427; (2010); A1;,
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Application of 40061-54-9, These common heterocyclic compound, 40061-54-9, name is Ethyl 2-(2-chlorophenyl)acetate, 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 35 2-(alpha-ethoxycarbonyl-2-chlorobenzylidene)-1-methylpyrrolidine Follow the procedure of Example 31 to obtain 73.8 g (93percent of theory) of the title compound (b.p. 129° to 0.008 mm of Hg) from 98.4 g of 2-dimethylamino-1-methyl-1-pyrrolinium-methylsulfate, 56.1 g of 2-chlorophenylacetic acid ethyl ester and a solution of 9.5 g of sodium in 190 ml of ethanol.

The synthetic route of 40061-54-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Byk Gulden Lomberg Chemische Fabrik G.m.b.H.; US4279918; (1981); A;,
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Reference of 89-71-4, The chemical industry reduces the impact on the environment during synthesis 89-71-4, name is Methyl 2-methylbenzoate, I believe this compound will play a more active role in future production and life.

(1) To 50 g of Na-X type zeolite dry powder (Zeolum type F-9; 100 meshes or finer, produced by Tosoh Corporation) was added dropwise 7.51 g (50.0 mmol) of methyl 2-methylbenzoate with stirring. Further, 3.9 ml (75 mmol) of bromine was added dropwise thereto at 45~50 C., and the mixture was stirred at 80 C. for 1 hour. To the reaction mixture was added a solution of potassium carbonate (5.5 g) in water (50 ml) and methanol (250 ml). The mixture was stirred at room temperature for 10 minutes and filtered. The residual zeolite powder was washed with warmed hydrous methanol (10%, 250 ml). The filtrate and the washing were combined and concentrated. The residue was diluted with ethyl acetate, washed twice with water, dried and concentrated. The residue (2.98 g) was subjected to silica gel column chromatography (eluted with n-hexane:toluene=10:1 and then 5:1 and then 3:1) to obtain 1.97 g (8.60 mmol) of methyl 5-bromo-2-methylbenzoate as crystals.

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 2-methylbenzoate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Sumitomo Chemical Company, Limited; US6489487; (2002); B1;,
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Reference of 64113-91-3, 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 64113-91-3 as follows.

A solution of 3- (3-PHENYL-1, 2, 4-oxadiazol-5-yl) propanoic acid (0. 1G, 0. 46MMOL) in DICHLOROMETHANE (10ML) was treated with 1, 1-dimethylethyl 2-aminobenzoate (0.089g, 0. 46MMOL), 1- (3-DIMETHYLAMINOPROPYL)-3-ETHYLCARBODIIMIDE HYDROCHLORIDE (0.097g, 0. 51MMOL) and 1H-1, 2, 3-BENZOTRIAZOL-1-OL (0.075g, 0. 56MMOL). After 4 days the reaction mixture was evaporated to dryness and the residue treated with a solution of TRIFLUOROACETIC acid (1ML) in DICHLOROMETHANE (1ML). After 2 hours the mixture was evaporated to dryness and the residue dissolved in 1ml of DMSO and subjected to purification using mass-directed HPLC. The title compound, which crystallized as a white solid from the eluant upon standing for 2 days, was filtered and dried to give 0.024g (15%) of the title compound. NMR. 5H (400MHZ, D6-DMSO) ; 3.05 (t, 2H, J=7.0 Hz), 3.32 (t, 2H, J=6.8 Hz, (partially obscured by water), 7.15 (t, 1 H, J=7.5 Hz), 7.56 (m, 4H), 7.98 (m, 3H), 8.41 (d, 1 H, J=8.3 Hz), 11. 27 (s, 1 H), 13.67 (s, 1 H) ; m/z 338 [MH+].

According to the analysis of related databases, 64113-91-3, the application of this compound in the production field has become more and more popular.

Reference:
Patent; SMITHKLINE BEECHAM CORPORATION; WO2005/16870; (2005); A1;,
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Related Products of 383-62-0, The chemical industry reduces the impact on the environment during synthesis 383-62-0, name is Ethyl 2-chloro-2,2-difluoroacetate, I believe this compound will play a more active role in future production and life.

To a mixture of (2S,3R,4R,5S,6R)-2-(5-(bicyclo[4.2.0]octa-1 (6),2,4-trien- 3-ylmethyl)-4-chloro-2-hydroxyphenyl)-6-(hydroxymethyl)tetrahydro-2H-pyran- 3,4,5-triol (Compound No.8) (260 mg, 0.64 mmol) in N,N-dimethylformamide (3.0 ml) with CS2CO3 (416 mg, 1.28 mmol) was added ethyl 2-chloro-2,2- difluoroacetate (151 mg, 0.95 mmol). The reaction mixture was stirred at room temperature for overnight, then purified by chromatography on a C18 reversed phase column to yield the title compound as a white solid. 1 H NMR(400 MHz, CD3OD) delta 7.47 (s, 1H), 7.23 (s, 1H), 7.04 (d, J = 7.6 Hz, 1H), 6.93 (d, J = 7.6 Hz, 1H), 6.88 (s, 1H), 6.75 (t, J = 72.4 Hz, 1H), 4.48 (d, J = 9.6 Hz, 1H), 4.03-4.12 (m, 2 H), 3.88 (d, J = 12.0 Hz, 1H), 3.64 – 3.68 (m, 1H), 3.45 – 3.56 (m, 2 H), 3.35 – 3.42 (m, 2 H), 3.13 (s, 4 H); MS (ES) m/z: 474.1 [M+NH4]+.

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-chloro-2,2-difluoroacetate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; JANSSEN PHARMACEUTICA NV; GAUL, Micheal; KUO, Gee-Hong; XU, Guozhang; LIANG, Yin; (218 pag.)WO2018/89449; (2018); 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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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. 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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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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Ester – an overview | ScienceDirect Topics