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CAS No. : | 100063-22-7 | MDL No. : | MFCD00068161 |
Formula : | C12H11NO2S | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | QESSCNMSOLRYBO-UHFFFAOYSA-N |
M.W : | 233.29 | Pubchem ID : | 700562 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P301+P312-P302+P352-P304+P340-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Reference Example 1; Methyl 3-chlorosulfonyl-5-phenyl-2-thiophenecarboxylate; Methyl 3-amino-5-phenyl-2-thiophenecarboxylate (5 g, manufactured by AK Scientific, Inc.) was dissolved in 20% hydrochloric acid (12 ml), and sodium nitrite (1.5 g, manufactured by Wako Pure Chemical Industries, Ltd.) dissolved in water (3.2 ml) under ice cooling was dripped to the resultant solution, and the resultant reaction solution was stirred for 1 hour. An acetic acid solution in which sulfur dioxide (2.5 g) and copper chloride (530 mg, manufactured by KANTO CHEMICAL CO., INC.) were dissolved was slowly added to the solution, and the resultant reaction solution was stirred for 5 hours. The reaction mixture was poured into ice water (100 ml), and a product was extracted with dichloromethane (100 ml), dried with magnesium sulfate and then concentrated to give 6.5 g of the titled compound. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | With potassium hydroxide; In water; toluene; | Example 119A 6-phenyl-2H-thieno[3,2-d][1,3]oxazine-2,4(1H)-dione Methyl-3-amino-5-phenylthiophene-2-carboxylate (0.25 g, 1.07 mmol) in water (6 mL) was reacted with potassium hydroxide (0.12 g, 2.14 mmol) at 90 C. for 24 hours. The reaction was cooled to 0 C. and phosgene (1.9M in toluene, 0.70 mL, 1.40 mmol) was added dropwise. After stirring at room temperature for 1 hour, the resulting solid was collected by filtration, washed with excess water and dried to give the title compound as a tan solid (0.175 g, 65%). |
65% | methyl-3-amino-5-phenylthiophene-2-carboxylate (0.25 g, 1.07 mmol) in water (6 ML) was reacted with potassium hydroxide (0.12 g, 2.14 mmol) at 90 C. for 24 hours.The reaction was cooled to 0 C. and phosgene (1.9M in toluene, 0.70 ML, 1.40 mmol) was added dropwise.After stirring at room temperature for 1 hour, the resulting solid was collected by filtration, washed with excess water and dried to give the title compound as a tan solid (0.175 g, 65%). | |
65% | 6-phenyl-2H-thieno [3,2-d][1,3]oxazine-2,4(1H)-dione methyl-3-amino-5-phenylthiophene-2-carboxylate (0.25 g, 1.07 mmol) in water (6 ML) was reacted with potassium hydroxide (0.12 g, 2.14 mmol) at 90 C. for 24 hours.The reaction was cooled to 0 C. and phosgene (1.9M in toluene, 0.70 ML, 1.40 mmol) was added dropwise.After stirring at room temperature for 1 hour, the resulting solid was collected by filtration, washed with excess water and dried to give the title compound as a tan solid (0.175 g, 65%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium hydroxide; In methanol; water; for 3h;Reflux; | General procedure: The 5-aryl-3-amino-2-carboxylic acid methyl ester (16.6 mmol) was added to a solution of KOH (60 mL, 0.6 M inH2O) and MeOH (60 mL). The mixture was heated to reflux for 3 h,concentrated, and washed with EtOAc (2 50 mL). The aqueous layer was cooled with ice and acidified by addition of a saturated aqueous solution of KHSO4. The precipitated solid was collected by filtration, washed with H2O (2 30 mL) and dried under reduced pressure over CaCl2. | |
With potassium hydroxide; In tetrahydrofuran; methanol; water; for 3h;Reflux; | General procedure: The 5-Aryl-3-amino-2-carboxylic acid methyl ester (16.6 mmol) was added to a solution of KOH (60 mL, 0.6 M in H2O) and MeOH (60 mL). The mixture was heated to reflux for 3 h, concentrated, and washed with EtOAc (2 x 50 mL). The aqueous layer was cooled with ice and acidified with a saturated aqueous solution of KHSO4.The precipitated solid was collected by filtration, washed with H2O (2 x 30 mL) and dried under reduced pressure over CaCl2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
96% | With sodium tris(acetoxy)borohydride; acetic acid; In 1,2-dichloro-ethane; for 2h; | To a stirred solution of 3-Amino-5-phenyl-thiophene-2- carboxylic acid methyl ester (1.82 g, 7.8 mmol) in 1, 2- dichloroethane (40 mL) was added sequentially 2- methoxypropene (3.0 mL, 31.2 mmol), ACOH (1.8 mL, 31.2 mmol) and NaBH (OAc) 3 (3.31 g, 15.6 mmol) and stirred for 2 hrs. It was then diluted with EtOAc and H 20. The aqueous solution was adjusted to pH = 7 by adding NAHCO3. The aqueous phase was extracted with EtOAc, the combined extract was washed with brine and dried on MGS04 and filtered. Purification on bond elute with hexane to 5% EtOAc-hexane furnished 3-Isopropylamino-5- phenyl-thiophene-2-carboxylic acid methyl ester (2.07 g, 96% yield NMR (CDC1 3, 400 MHz): 8 7.62 (d, 2H), 7.40 (m, 3H) 6.91 (s, 1H), 3.84 (s, 3H), 3.71 (m, 1H), 1. 35 (d, 6H). |
To a solution of S-amino-δ-phenyl-thiophene^-carboxylic acid methyl ester (4.92 g, 21.1 mmol) in DCM (1 10 mL) was added 2-methoxypropene (8.23 mL, 84.4 mmol), acetic acid (4.83 mL, 84.4 mmol) and sodium triacetoxyborohydride (8.94 g, 42.2 mmol) and the mixture <n="38"/>stirred overnight. Ethyl acetate and water were added, the aqueous phase adjusted to pH7 using sodium bicarbonate and then extracted with ethyl acetate. The combined organic extracts were washed with brine and dried over sodium sulphate. The crude product was purified by silica chromatography using a Flashmaster Personal apparatus (Argonaut) eluting with DCM / cyclohexane (1 :4) to give the title compound. MS calcd for (C15H17NO2S+ H)+: 276 MS found (electrospray): (M+H)+ =276 | ||
To a solution of S-amino-δ-phenyl-thiophene^-carboxylic acid methyl ester (4.92 g, 21.1 mmol) in DCM (1 10 ml.) was added 2-methoxypropene (8.23 ml_, 84.4 mmol), acetic acid (4.83 ml_, 84.4 mmol) and sodium triacetoxyborohydride (8.94 g, 42.2 mmol) and the mixture stirred overnight. Ethyl acetate and water were added, the aqueous phase adjusted to pH7 using sodium bicarbonate and then extracted with ethyl acetate. The combined organic extracts were washed with brine and dried over sodium sulphate. The crude product was purified by silica chromatography using a Flashmaster Personal apparatus (Argonaut) eluting with DCM / cyclohexane (1 :4) to give the title compound. MS calcd for (Ci5H17NO2S+ H)+: 276 MS found (electrospray): (M+H)+ =276 |
Intermediate 30 Methyl 3-[(1 -methylethyljaminol-δ-phenyl^-thiophenecarboxylateTo a solution of S-amino-δ-phenyl-thiophene^-carboxylic acid methyl ester (4.92 g, 21.1 mmol) in DCM (1 10 ml.) was added 2-methoxypropene (8.23 ml_, 84.4 mmol), acetic acid (4.83 ml_, 84.4 mmol) and sodium triacetoxyborohydride (8.94 g, 42.2 mmol) and the mixture stirred overnight. Ethyl acetate and water were added, the aqueous phase adjusted to pH7 using sodium bicarbonate and then extracted with ethyl acetate. The combined organic extracts were washed with brine and dried over sodium sulphate. The crude product was <n="46"/>purified by silica chromatography using a Flashmaster Personal apparatus (Argonaut) eluting with DCM / cyclohexane (1 :4) to give the title compound. MS calcd for (C15H17NO2S+ H)+: 276 MS found (electrospray): (M+H)+ =276 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With phenyltrimethylammonium tribromide; calcium carbonate; In methanol; dichloromethane; | EXAMPLE 8A methyl 3-amino-4-bromo-5-phenylthiophene-2-carboxylate To a mixture of <strong>[100063-22-7]methyl 3-amino-5-phenylthiophene-2-carboxylate</strong> (2.33 g, 10 mmol) and phenyltrimethylammonium tribromide (9.4 g, 25 mmol) in dichloromethane (25 mL) and methanol (25 mL) was added calcium carbonate (4.03 g, 40 mmol) and the mixture stirred overnight. The solid was filtered off and the filtrate concentrated. The residue was purified by flash chromatography on silica gel using 1:10 ethyl acetate/hexanes to give 2.75 g of the title compound. 1H NMR (DMSO-d6) δ 7.62-7.65 (m, 2H), 7.47-7.51 (m, 3H), 3.80 (s, 3H). | |
With phenyltrimethylammonium tribromide; calcium carbonate; In methanol; dichloromethane; | EXAMPLE 8A methyl 3-amino-4-bromo-5-phenylthiophene-2-carboxylate To a mixture of <strong>[100063-22-7]methyl 3-amino-5-phenylthiophene-2-carboxylate</strong> (2.33 g, 10 mmol) and phenyltrimethylammonium tribromide (9.4 g, 25 mmol) in dichloromethane (25 mL) and methanol (25 mL) was added calcium carbonate (4.03 g, 40 mmol) and the mixture stirred overnight. The solid was filtered off and the filtrate concentrated. The residue was purified by flash chromatography on silica gel using 1:10 ethyl acetate/hexanes to give 2.75 g of the title compound. 1H NMR (DMSO-d6) δ 7.62-7.65 (m, 2H), 7.47-7.51 (m, 3H), 3.80 (s, 3H). | |
With bromine; acetic acid; at 60℃; for 0.75h; | Step 8A: To a solution of methyl-3-amino-5-phenyl thiophene-2-carboxylate (1.0 g, 4.10 mmol) in HOAc (15.0 mL) was added Br2 (0.63 mL, 12.3 mmol). The reaction was heated to 60 C. and allowed to stir approximately 45 minutes, after which it was judged complete by LCMS. The excess Br2 was quenched with excess Na2S2O3, and the crude product was extracted (3*25 mL) into DCM. The combined organic layers were dried over MgSO4 and concentrated in vacuo, affording 1.6 g of crude methyl 3-amino-4-bromo-5-phenylthiophene-2-carboxylate as a light yellow solid >90% purity. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 3.87 (s, 3 H) 5.74 (br. s, 2 H) 7.41-7.49 (m, 3 H) 7.63-7.68 (m, 2 H); LCMS: m/e=282.1 [M+H]+ |