75997-77-2Relevant academic research and scientific papers
β-Diceto enamines heterocycliques: 1. Indanediones-1,3 substituees en 2 par un heterocycle azote
Ploquin, J.,Sparfel, L.,Baut, G. Le,Floc'h, R.,Letourneux, Y.
, p. 961 - 973 (2007/10/02)
The condensation of methylated N-heterocycles and especially monomethyl- and polymethylpyridines on phthalic anhydrides leads to 2-aryl-1,3-indanediones.The 3-alkylidenylphthalides formed in an intermediary state have been isolated.The influence of solvents and temperature on the velocity and yield of formation of 2-(2- and 4-pyridyl)-1,3-indandiones has been studied.The ir and nmr spectra confirm that these compounds exist under a β-diketoenamine form resonating with a betaine form.
