Dibenzoacridines: synthesis by alkyne–carbonyl-metathesis and properties† Erich Ammon,a Paul Heine,a Miguel Andre Argüello Cordero,c Stefan Lochbrunner, c Alexander Villinger, a Peter Ehlers *ab and Peter Langer *ab Abstract Dibenzo[a,j]acridines and regioisomeric dibenzo[c,h]acridines were synthesized from a common starting material, 2,3,5,6-tetrachloropyridine, by combination of site-selective cross-coupling reaction followed by ring-closing alkyne–carbonyl metathesis using simple Brønsted...
