C-(Methoxycarbonyl)ketene N-Imidoylimines. Synthesis and Rearrangement into Methyl 4,6-Diazahepta-2,4,6-trienoates. Cycloaddition Reactions with Isocyanides: Preparation of Imidazolines

Article abstract of DOI:10.1021/jo00206a009

The ketene N-imidoylimines 12 are shown to be transitory intermediates formed by the reaction of isocyanides with sulfides 1 or by the reaction of imino chloro sulfides with sodium salts of α-cyano esters 3.When the nitrogen atom of the imidoyl group bear