A New Tetracycle from Dimerization of theN-Methylpyridazinium Ion in Aqueous Solution

Abstract

In a one-pot synthesis at room temperature the N-methylpyridazinium ion (1) dimerizes stereospecifically and with 100 % conversion in a series of OH -catalyzed processes to give a new tetraazafluorene (2). Four of the individual steps can be identified directly and monitored by H NMR spectroscopy.