Title of article :
Synthesis of 1-azaxanthones by condensation of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3-(cyano)benzopyrylium triflates and subsequent domino ‘retro-Michael/nitrile-addition/heterocyclization’ reaction
Author/Authors :
Muhammad A. Rashid، نويسنده , , Nasir Rasool، نويسنده , , Bettina Appel، نويسنده , , Muhammad Adeel، نويسنده , , Vahuni Karapetyan، نويسنده , , Satenik Mkrtchyan، نويسنده , , Isolde Kommer, Helmut Reinke، نويسنده , , Christine Fischer، نويسنده , , Peter Langer، نويسنده ,
Abstract :
Functionalized 1-azaxanthones (5-oxo-5H-[1]-benzopyrano[2,3-b]pyridines) were prepared by TMSOTf-mediated condensation of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3-cyanochromones and subsequent base-mediated domino ‘retro-Michael/nitrile-addition/heterocyclization’ reaction.
