Synthesis of polyfunctional ketenimines and 1-azadienes use of tert-butyl isocyanide and acetylenic esters in the presence of 3-chloropentane-2, 4-dione
The 1:1 reactive intermediate generated by the addition of tert-butyl isocyanide to dialkyl acetylenedicarboxylates was trapped by 3-chloropentane-2, 4-dione to yield polyfunctionalised ketenimines and 1-azadienes.