thus limiting the scope of action of this class of compounds. Among the tested substances, most triazenes were stable in the presence of titanium isopropoxide and/or strong nucleophiles. 1-(2-R-phenyl)-3,3-diisopropyltriazenes turned out to be particularly stable under strong basic conditions. 1,2-addition reactions in the presence of Grignardreagents or lithiated compounds, showed in most cases no