They are not imines, but the reaction of a certain precursor to this group with tosyl chlorine produces an important reagent, and that reagent's most frequent application with a strong base in two rounds creates this class of compound as an intermediary.
Barton sometimes names a method using a non-nucleophilic base to convert this class of reactants into a vinyl iodide. They are not imines, but the reaction of a certain precursor to this group with tosyl chlorine produces an important reagent, and that reagent's most frequent application with a strong base in two rounds creates this class of compound as an intermediary. The reaction of those bases' final product is a vinyllithium compound. Members of this group are frequently synthesized from an aryl diazonium salt and a beta-keto-ester in the Japp-Klingemann reaction. This functional group is also commonly formed from reaction of a similarly named compound discovered by Kurtius with a ketone or aldehyde, whose oxygen molecule is then replaced with an NNH2 group. FTP, name this intermediary state of reactants in the Shapiro and Wolff-Kischner reactions.
Barton sometimes names a method using a non-nucleophilic base to convert this class of reactants into a vinyl iodide.
{hydrazones} [do not accept or prompt on {hydrazine} or {hydrazides} or other wrong answers]