Acetonitrile → 4-Benzyloxy-3-aminocarbonylindole

Participants

Reaction Steps

4.4 g. 4-Benzyloxyindole (see Helv. Chim. Acta, 54. 2411/1971) are dissolved in 20 ml. anhydrous acetonitrile, cooled to 0° C. and mixed with 1.8 ml. N-carbonylsulphamoyl chloride in 20 ml. acetonitrile. After a reaction period of about 1 hour, a solution of 3.4 g. potassium hydroxide in 34 ml. water is added thereto and the reaction mixture then stirred for 1 hour at ambient temperature. After evaporating the solvent, the residue is taken up in 200 ml. 2 N hydrochloric acid and extracted with methylene chloride. From the methylene chloride extract there are obtained 4.8 g. (45% of theory) 4-benzyloxy-3-aminocarbonylindole, which is recrystallized from ethyl acetate; m.p. 176° C.

Provenance & Evidence