ChemicalBook CAS DataBase List Benzoic acid, 2-(methylamino)-, ethyl ester

Benzoic acid, 2-(methylamino)-, ethyl ester synthesis

14synthesis methods

Product Name:Benzoic acid, 2-(methylamino)-, ethyl ester
CAS Number:35472-56-1
Molecular formula:C10H13NO2
Molecular Weight:179.22

Benzoic acid, 2-(methylamino)-, ethyl ester can be produced from N-Mcthylanthranilic acid and Ethyl alcohol, by azcotropic type csterification; or by Methylation of Ethyl anthranilate with Dimethyl sulfate.

64-17-5 Synthesis

64-17-5
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119-68-6
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$27.51/25g

Benzoic acid, 2-(methylamino)-, ethyl ester

35472-56-1
43 suppliers
$31.00/100mg

Yield:35472-56-1 100%

Reaction Conditions:

with sulfuric acid for 20 h;Inert atmosphere;Reflux;

Steps:

Ethyl 2-(methylamino) benzoate 8

Concentrated sulfuric acid (2 mL, 37 mmol, 98%) was added to a stirred solution of 2-(methylamino)-benzoic acid 7 (1.1 g, 7.5 mmol) in anhydrous ethanol (16.5 mL). The solution was refluxed for 20 hours, or until the reaction was complete. The solvent was removed under reduced pressure and the residue was re-dissolved in water (20 mL) and neutralised with sodium hydroxide (5 M). The aqueous phase was extracted with chloroform (3 x 20 mL), the organic layers were combined, washed with brine (40 mL), dried over anhydrous magnesium sulfate and the solvent evaporated to yield a brown oil 8 in quantitative yield (1.3 g, 7.5 mmol, 100%). Rf 0.40 (1/10 v/v ethyl acetate/hexane); IR (ZnSe cell, oil) vmax: 3378 (w, aromatic R2NH), 2981, 2906 (w, C-H), 1677 (s, C=O), 1579, 1517 (m, aromatic C=C), 1233 (s, aromatic R2NH, ester C-O), 1125, 1085 (m, aromatic C=C) cm-1; 1H NMR (300 MHz, d6-DMSO): δ 7.79 (1H, dd, 3J6-5 = 8.1 Hz, 4J6-4 = 1.4 Hz, 6-CH), 7.56 (1H, br, d, 3JNH-10 = 4.2 Hz, NH) 7.40 (1H, ddd, 3J5-6 ~ 3J5-4 = 7.8 Hz, 4J5-3=1.2 Hz, 5-CH), 6.71 (1H, d, 3J3-4 = 8.4 Hz, 3-CH), 6.57 (1H, dd, 3J4-3 ~ 3J4-5 = 7.8 Hz, 4-CH), 4.25 (2H, q, 3J8-9 = 7.02 Hz, 8-CH2-), 2.91 (3H, d, 3J10-NH = 5.1 Hz, 10-CH3), 1.30 (3H, t, 3J9-8 = 7.2 Hz, 9-CH3) ppm; 13C NMR (125 MHz, CDCl3): δ 168.0 (7-C=O), 151.4 (2-C), 133.8 (4-CH), 130.9 (6-CH), 113.6 (5-CH), 110.0 (3-CH), 109.5 (1-C), 59.5 (8-CH2-), 28.8 (10-CH3), 13.7 (9-CH3) ppm; LRMS (+ ESI) m/z: 180 ([M + H]+, 100%), 162 ([M - C3H5O2 + MeOH + Na + H]+ 56%), 134 ([M - OCH2CH3]+, 47%), 130 ([M - (CO2CH2CH3) + Na + H]+, 48%)

References:

Munoz, Lenka;Kavanagh, Madeline E.;Phoa, Athena F.;Heng, Benjamin;Dzamko, Nicolas;Chen, Ew-Jun;Doddareddy, Munikumar Reddy;Guillemin, Gilles J.;Kassiou, Michael [European Journal of Medicinal Chemistry,2015,vol. 95,p. 29 - 34]

64-17-5 Synthesis

64-17-5
704 suppliers
$10.00/50g