SYNTHESIS OF CONDENSED SYSTEMS CONTAINING THE TETRAZOLE RING BY BASE-CATALYZED INTRAMOLECULAR CYCLIZATION OF QUATERNARY AMMONIUM SALTS
DOI:
https://doi.org/10.1007/580Abstract
Quaternary ammonium salts containing propargyl and 3-(2-methyltetrazol-5-yl)propargyl groups undergo base-catalyzed cyclization at room temperature with self heating to form condensed heterocyclic systems containing the tetrazole ring. Heating at 90-92°C for 2 h is necessary to cyclize the allyl analogs of the starting salts.
Authors: E. O. Chukhadzhyan, K. G. Shakhatuni, El. O. Chukhadzhyan, and N. T. Gevorkyan.
English Translation in Chemistry of Heterocyclic Compounds, 1999, 35 (3), pp 343-347