Adding a certain compound to certain chemical reactions, such as: 653-92-9, name is Methyl 2-bromo-4-fluorobenzoate, 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 653-92-9, 653-92-9
General procedure: Method A:16,17 A two-necked round-bottomed flask equipped with a reflux condenser and a magnetic stir bar was charged with the 2-bromobenzoic acid (20mmol) and freshly distilled methanol (25mL). The solution was heated in a hot water bath, conc. H2SO4 (8mmol) was added slowly and the reaction mixture was refluxed for 24h. After cooling to room temperature around half of the amount of the solvent was removed in vacuo and the residue was partitioned between water (50mL) and diethyl ether (70mL). The organic layer was separated and washed with saturated NaHCO3 (2¡Á50mL), water (50mL) and brine (50mL), dried over anhydrous MgSO4 and the volatiles were removed under reduced pressure. The crude product thus obtained was purified by flash chromatography on silica gel to afford the alkyl-2-halobenzoate. (0023) In a two-necked round-bottomed flask equipped with a reflux condenser and a magnetic stir bar the alkyl 2-halobenzoate (22.5mmol) was dissolved in freshly distilled dry THF (30mL) under argon. The solution was cooled to 0C using an ice bath and NaH (60% in mineral oil, 15mmol) was added portionwise. After stirring for 15min a solution of the alkyl acetate (15mmol) in dry THF (30mL) was added dropwise to the reaction mixture at 0C. The mixture was warmed up, stirred at room temperature for 2h and heated under reflux for 24h. After cooling to room temperature around half of the amount of the solvent was removed in vacuo and the reaction mixture was diluted with toluene (50mL). The resulting mixture was washed with 2N HCl (50mL), saturated NH4Cl (50mL), dried over anhydrous MgSO4 and the volatiles were removed under reduced pressure. The crude product was purified by flash column chromatography on silica gel to afford the alkyl 3-(2?-halophenyl)-3-oxo-propanoate 1.
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-bromo-4-fluorobenzoate, other downstream synthetic routes, hurry up and to see.
Reference:
Article; Weischedel, Heike; Sudheendran, Kavitha; Mikhael, Alevtina; Conrad, Juergen; Frey, Wolfgang; Beifuss, Uwe; Tetrahedron; vol. 72; 24; (2016); p. 3454 – 3467;,
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