Reaktion #467739

Reaktionsgleichung

N-methylaniline

2-trifluoromethylbenzene-sulfonyl chloride

sodium hydroxide

→

2-trifluoromethyl-N-methylbenzene-sulfonanilide

Ausbeute 96.0%

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGwith stirring until the solution

Vorschrift

To 0.88 g (˜0.01 mole) of freshly prepared N-methylaniline (b.p. 196° C.) is added 2.0 g (˜0.01 mole) of 2-trifluoromethylbenzene-sulfonyl chloride (98 w/w %). The mixture is stirred until hot. Ten percent sodium hydroxide is then added dropwise with stirring until the solution is slightly alkaline. The 2-trifluoromethyl-N-methylbenzene-sulfonanilide is formed as a viscous light brown liquid. It is next washed with water several times until the wash water is neutral to litmus paper, and the viscous light brown liquid is extracted with ether. The ether layer is dried over magnesium sulfate, filtered and the solvent removed by evaporation. The yield of light brown oil is 2.5 g (96% yield). 1H NMR (deuterioacetone): δ 7.8.2 (m, 9 ArH), 3.2 (s, 3H, N—CH3)

Quelle