* 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.
With hydrogen bromide; Selectfluor In water at 20℃; for 1 h;
General procedure: 1a as example: To a stirred suspension of N-(p-tolyl)acetamide 1a (75 mg, 0.5 mmol) and Selectfluor (213 mg, 0.6 mmol) in water (3.0 mL) was added HBr (40percent aqueous, 0.08 mL, 0.55 mmol), and the mixture was stirred for 5 min at room temperature. After 1a was consumed, as indicated by TLC, the reaction mixture was quenched with saturated aqueous Na2S2O3 (2.0 mL) and water (20.0 mL), and extracted with CH2Cl2 (10.0 mL) three times. The residue obtained after evaporation of the solvent was purified by column chromatography on silica gel (petroleum ether–ethyl acetate = 6:1, v/v) to afford N-(2-bromo-4-methylphenyl)acetamide 2a as a white solid (108 mg, 95percent yield).
Reference:
[1] Chemistry - A European Journal, 2017, vol. 23, # 5, p. 1044 - 1047
[2] Tetrahedron Letters, 2016, vol. 57, # 48, p. 5390 - 5394
[3] Journal of Chemical Research, Synopses, 1997, # 11, p. 432 - 433
[4] European Journal of Organic Chemistry, 2018, vol. 2018, # 43, p. 5972 - 5979
[5] Gazzetta Chimica Italiana, 1908, vol. 38 II, p. 22
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[ 533-17-5 ]
[ 10035-10-6 ]
[ 7697-37-2 ]
[ 3460-23-9 ]
Reference:
[1] Gazzetta Chimica Italiana, 1908, vol. 38 II, p. 22
With hydrogen bromide; Selectfluor; In water; at 20℃; for 1h;
General procedure: 1a as example: To a stirred suspension of N-(p-tolyl)acetamide 1a (75 mg, 0.5 mmol) and Selectfluor (213 mg, 0.6 mmol) in water (3.0 mL) was added HBr (40% aqueous, 0.08 mL, 0.55 mmol), and the mixture was stirred for 5 min at room temperature. After 1a was consumed, as indicated by TLC, the reaction mixture was quenched with saturated aqueous Na2S2O3 (2.0 mL) and water (20.0 mL), and extracted with CH2Cl2 (10.0 mL) three times. The residue obtained after evaporation of the solvent was purified by column chromatography on silica gel (petroleum ether-ethyl acetate = 6:1, v/v) to afford N-(2-bromo-4-methylphenyl)acetamide 2a as a white solid (108 mg, 95% yield).