Synthesis of the first lariat crown-formazan, prototype of a new series of podandocoronands

Article abstract of DOI:10.1016/S0040-4039(00)78247-5

Crown-formazan (1) with a pendant hydroxy group was obtained by a phase- transfer assisted azo-coupling reaction. Acylation of the hydroxy group of (1) with 2-chloroacetyl chloride followed by reaction with dimethylamine afforded 13-[2-(N,N-dimethylamino)