Tag: M.W=100-200

10259-22-0, name is Ethyl 3-methoxybenzoate, belongs to esters-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. Computed Properties of C10H12O3

General procedure: A typical procedure is as follows. Magnesium turnings (0.36 g, 15 mmol) for Grignard reagent with no pre-treatment were placed in a 100 mL four-necked flask and were heated to dry. Carbon dioxide was introduced to the flask and a balloon filled with carbon dioxide was attached to the flask. Chlorotrimethylsilane (3.17 mL, 25 mmol) in dry DMF (30 mL) was added to the flask and the reaction mixture was stirred for 30 minutes at room temperature. Ethyl benzoate 1a (0.72 mL, 5 mmol) was added dropwise by means of a syringe and the reaction mixture was stirred at room temperature until the starting material disappeared. Then the reaction mixture was carefully poured into 1 M hydrochloric acid solution (100 mL) and the product was extracted with diethyl ether (40 mL) four times. The combined organic layer was washed with 1 M potassium carbonate solution (40 mL) twice and the product was transferred to the water layer. To the combined water layers, 3 M hydrochloric acid (200 mL) was added and the product was extracted with ether (40 mL) four times. The combined ether layer was washed with water (50 mL) and brine (50 mL), dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure to give the product 2a.

The synthetic route of 10259-22-0 has been constantly updated, and we look forward to future research findings.

Reference:
Article; Maekawa, Hirofumi; Okawara, Hikaru; Murakami, Taro; Tetrahedron Letters; vol. 58; 3; (2017); p. 206 – 209;,
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Electric Literature of 680-65-9,Some common heterocyclic compound, 680-65-9, name is Diethyl difluoromalonate, molecular formula is C7H10F2O4, 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.

In a dry 25 mL round bottom flask under an Ar atmosphere, NaOEt (9.71 mL, 26.0mmol) in EtOH (21 % weight) and diethyl-2,2-difluoromalonate (2.55 g, 13.0 mmol) werestirred at rt for 10 mm. A solution of Example id (554 mg, 1.30 mmol) in EtOH (6.00mL) was added dropwise and the reaction was stirred at rt over 18 hrs. The EtOH wasremoved in vacuo and the crude oil was dissolved in 1 M HC1 (10 mL). The aqueoussolution was extracted with EtOAc (20 mL x 3), and the combined organics were washedwith aq NaC1 (20 mL), dried over Na2SO4, filtered into a round bottom flask andconcentrated in vacuo to give the title compound as a crude brown oil (749 mg, 1.30mmol). MS (ESI) 576.0 [M+H]+.

The synthetic route of 680-65-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; EXELIXIS PATENT COMPANY LLC; KICK, Ellen, K.; BODAS, Mandar; MOHAN, Raju; BUSCH, Brett, B.; AVERBUJ, Claudia; VALENTE, Meriah; WURTZ, Nicholas; RAO, Prasanna Savanor, Maddu; SHETTY, Jeevanprakash; VENU, Alla; WO2014/152738; (2014); A1;,
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Related Products of 18358-63-9,Some common heterocyclic compound, 18358-63-9, name is Methyl 4-(methylamino)benzoate, molecular formula is C9H11NO2, 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.

Part D: To the mixture of the product from Step C (412.0 mg, 2.5 mmol) and Et3N (0.5 mL) in CH2Cl2 at 0 C. was added chloroacetyl chloride (0.24 mL, 3.0 mmol) and DMAP (15 mg). After stirring at this temperature for 1.5 hr, the reaction mixture was washed with water and brine and dried over MgSO4. The residue was purified by chromatography on silica gel (20% ethyl acetate in hexane) to give the desired product as a white solid. LC/MS ESI found: (M+1)+=242.3.

The synthetic route of 18358-63-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Pinto, Donald J.P.; Han, Wei; Hu, Zilun; Qiao, Jennifer; US2003/232804; (2003); A1;,
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These common heterocyclic compound, 13412-12-9, name is Methyl 3-(methylamino)but-2-enoate, 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. category: esters-buliding-blocks

To 3- methylamino-but-2-enoic acid methyl ester (5.Og, 39.1mmol) in THF (7OmL) was added pyridine (3.7mL). The mixture was cooled to O0C, and 4-bromobenzoyl chloride (8.55g, 39.1mmol) in THF (3OmL) was added dropwise over 2 minutes. The reaction was warmed to room temperature over 1 hour and then stirred at room temperature overnight. Aqueous work-up gave the title compound.

The synthetic route of Methyl 3-(methylamino)but-2-enoate has been constantly updated, and we look forward to future research findings.

Reference:
Patent; AMIRA PHARMACEUTICALS, INC.; HUTCHINSON, John Howard; SEIDERS, Thomas Jon; WANG, Bowei; ARRUDA, Jeannie M.; ROPPE, Jeffrey Roger; PARR, Timothy; WO2010/141761; (2010); A2;,
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Application of 18927-05-4, These common heterocyclic compound, 18927-05-4, name is Methyl 3-Methoxyphenylacetate, 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: 1.4mmol of 5-amino-1-substituted-4-carboxamide-1H-imidazole (1) was dissolved in 10mL of absolute methanol. Then 5.6mmol of the appropriate ester isadded into this solution. This mixture was added in 10mL ofmethoxide-methanol solution prepared from sodium (0.15 g, 6.3mmol) and 10mL of absolute methanol. The mixture was refluxed for 15-20 h. After cooling, the solvent was evaporated off and the residue was taken into ethyl acetate. The organic phase was dried over Na2SO4 and evaporated. And the residue was purified via silica gel chromatography(eluent: the mixture of ethyl acetate and methanol) to obtainthe pure product (2a-2q).

Statistics shows that Methyl 3-Methoxyphenylacetate is playing an increasingly important role. we look forward to future research findings about 18927-05-4.

Reference:
Article; Yuan, Wei; Zhao, Xin-Yun; Chen, Xi; Zhan, Chang-Guo; Journal of Chemistry; vol. 2016; (2016);,
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Application of 34837-84-8, 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. 34837-84-8, name is Methyl 2-(4-fluorophenyl)acetate belongs to esters-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

5A. methyl 2-(4-fluorophenyl)-3-(4-(methylsulphonyl)phenyl)-3-oxopropanoate. A solution of methyl 2-(4-fluorophenyl)acetate (2.35 g, 14 mmol) in THF (15 ML), at -78 °C, was treated dropwise with 1 N lithium bis(trimethylsilyl)amide (14 ML, 14 mmol).. After 15 minutes a suspension of 4-(methylsulphonyl)benzoyl chloride (3.3 g, 15 mmol) in THF (25 ML) was added in portions.. The reaction mixture was stirred for 60 minutes at -78 °C and at 0 to 5 °C for 12 hours.. The mixture was quenched with 10percent citric acid, the THF removed in vacuo, and the residue triturated with hexanes to provide the desired product as a solid (yield: 3.4 g; 69percent). MS (DCI-NH3) m/z 368 (M+H)+; 1H NMR (300 MHz, DMSO-d6) delta 3.27 (s, 3H), 3.69 (s, 3H), 6.35 (s, 1H), 7.21 (m, 2H), 7.44 (m, 2H), 8.06 (d, J = 9 Hz, 2H), 8.25 (d, J = 9 Hz, 2H).

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-(4-fluorophenyl)acetate, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; ABBOTT LABORATORIES; EP1206474; (2004); B1;,
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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. 35179-98-7, name is Chloromethyl ethyl carbonate, A new synthetic method of this compound is introduced below., Quality Control of Chloromethyl ethyl carbonate

Example 59: 4-{(R)-3-[Bis-(ethoxycarbonyloxymethoxy)-phosphoryl]-2-[(2-pheiiyl- thiazole^-carbony^-aminoj-propionylj-piperaziiie-l-carboxylic acid butyl ester A solution of Example 9 (100 mg) and NEt3 (0.08 mL) in DMPU (0.35 mL) was stirred for 10 min at RT. Then, NaI (35 mg) and carbonic acid chloromethyl ester ethyl ester (0.76 mg, prepared as described in WO2004092189) were added. The mixture was stirred overnight at 500C under argon. The reaction mixture was washed with H2O and the aq. phase extracted with toluene (3x). The combined org. phases were dried over Na2Stheta4 and concentrated to dryness. CC purification (EA/[CH2Cl2/Me0H 8:2] 1:0 to 3:1) gave 55 mg of the desired product. LC-MS: tR = 1.07 min; [M+H]+: 729.28.

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; ACTELION PHARMACEUTICALS LTD; CAROFF, Eva; HILPERT, Kurt; HUBLER, Francis; LEHMANN, David; MEYER, Emmanuel; RENNEBERG, Dorte; WO2010/122504; (2010); A1;,
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Related Products of 89-91-8,Some common heterocyclic compound, 89-91-8, name is Methyl 2,2-dimethoxyacetate, molecular formula is C5H10O4, 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.

According to a general procedure for formation of a Weinreb intermediate,36 a vigorously stirred slurry of methyl dimethoxyacetate (4, 200 ^iL, 1.64 mmol) and N, O-dimethylhydroxylamine hydrochloride (201 mg, 2.05 mmol) in THF (2.4 mL) under argon was treated dropwise with isopropylmagnesium bromide (2.05 mL, 4.10 mmol, 2 M solution in THF) at -20 C. The resulting heterogeneous reaction mixture was stirred for 1.5 h at -20 C under argon. The reaction mixture was quenched with saturated aqueous NH4C1 and H20 (1 : 1). After extraction with ether (3 x 50 mL), the combined organic extract was washed (brine), dried (Na2S04) and concentrated under vacuum at room temperature. The ? NMR spectrum of the crude product showed unreacted 4 and signals consistent with those reported for l,l-dimethoxy-3-methylbutan-2-one (A).

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

Reference:
Patent; NORTH CAROLINA STATE UNIVERSITY; LINDSEY, Jonathan S.; MASS, Olga; WO2013/62670; (2013); A2;,
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Related Products of 63485-50-7, These common heterocyclic compound, 63485-50-7, name is cis-Methyl 3-hydroxycyclobutanecarboxylate, 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.

8-0I (Intermediate 126A) (380 mg, 2.23 mmol) in tetrahydrofuran (10 mL). The reaction mixture was cooled to 0 C, and methyl 3-hydroxycyclobutanecarboxylate (0.37 mL, 3.5 mmol) was added, followed by DIAD (0.68 mL, 3.5 mmol). After 10 min, the reaction mixture was warmed to room temperature, stirred for 3 days and diluted with water and EtOAc. The mixture was partitioned, and the aqueous layer was extracted with EtOAc (2X). The organic layer was washed with water, dried over sodium sulfate, filtered, and concentrated. The residue was purified on silica gel eluting with a 0%-1 00% EtOAc-hexanes gradient to give a mixture of cis and trans isomers which were separated on an IC 30 X 250 mm column eluting with 50% EtOH in hexanes to give the title compound (137 mg, 21 %). 1H NMR (400 MHz, CD3SOCD3) delta 2.48- 2.59 (m, 2 H), 2.82 (ddd, J = 14, 7, 5 Hz, 2 H), 3.22-3.32 (m, 1 H), 3.31 (s, 3 H), 5.07 (t, J = 7 Hz, 1 H), 6.91 (dd, J = 1 1 , 3 Hz, 1 H), 7.31 (dd, J = 9, 3 Hz, 1 H), 7.59 (dd, J = 8, 4 Hz, 1 H), 8.30 (dd, J = 8, 2 Hz, 1 H), 8.83 (dd, J = 4, 2 Hz, 1 H); LC-MS (LC-ES) M+H = 276.

Statistics shows that cis-Methyl 3-hydroxycyclobutanecarboxylate is playing an increasingly important role. we look forward to future research findings about 63485-50-7.

Reference:
Patent; GLAXOSMITHKLINE INTELLECTUAL PROPERTY DEVELOPMENT LIMITED; DEATON, David Norman; GUO, Yu; HANCOCK, Ashley Paul; SCHULTE, Christie; SHEARER, Barry George; SMITH, Emilie Despagnet; STEWART, Eugene L.; THOMSON, Stephen Andrew; (556 pag.)WO2018/69863; (2018); A1;,
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Synthetic Route of 18469-52-8, A common heterocyclic compound, 18469-52-8, name is Methyl 4-(aminomethyl)benzoate, molecular formula is C9H11NO2, 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.

To a solution of 6-bromo-4-phenyl-3-isocoumarincarboxylic acid methyl ester (3.60 g) in methanol (50 ml) was added 4-aminomethylbenzoic acid methyl ester (3.16 ml) and the mixture was stirred at room temperature for 18 hrs. The solvent was evaporated under reduced pressure and 1N hydrochloric acid was added, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine and dried by adding sodium sulfate. The solvent was evaporated under reduced pressure, and the obtained residue was dissolved in methanol (100 ml). Conc. sulfuric acid (10 ml) was added, and the mixture was heated under reflux for 3 hr. The solvent was evaporated under reduced pressure, water was added under ice-cooling and the mixture was neutralized with potassium carbonate. The solution was extracted with ethyl acetate and the extract was washed with saturated brine. Sodium sulfate was added to dry the mixture. The obtained residue was recrystallized from methanol to give the title compound (3.39 g, 67%).1H-NMR (CDCl3) delta: 3.18 (3H, s), 3.89 (3H, s), 5.45 (2H, s), 7.24-7.47 (8H, m), 7.67 (1H, dd, J=1.8, 8.4 Hz), 7.97 (2H, d, J=8.4 Hz), 8.40 (1H, d, J=8.4 Hz).

The synthetic route of 18469-52-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Takeda Chemical Industries, Ltd.; EP1484320; (2004); A1;,
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