Acetylene → N-Benzyl-3-(1,2,3-triazol-1-yl)-pyrrolidine

Participants

Reaction Steps

A solution of N-benzyl-3-azido-pyrrolidine (1.5 g, 0.0074 mol) in acetone was taken in a steel bomb and cooled in dry ice/acetone bath. To this cold solution acetylene (2.5 mg, 0.096 mol) was added under N2 atmosphere. The sealed steel bomb was then heated in an oil bath at 75° C. for 20 h. The vessel was cooled again in dry ice/acetone bath and excess of acetylene released slowly, while the temperature rose to the room temperature (r.t.). The reaction mixture was concentrated to yellow-brown oil. Crude yield: 2.02 g. Crude compound was purified on silica gel column to obtain the title compound as a light yellow-brown oil. Yield: 1.02 g (60%). 1H NMR (CDCl3) δ: 2.0-3.3 (m, 6H), 3.7 (S, 2H), 5.3 (m, 1H), 7.45 (s, 5H), 7.8 (s, 1H), 7.95 (s, 1H).

Provenance & Evidence