Convenient Synthesis of Cycloalkene-fused Phthalazinones
摘要:
A series of cycloalkene-annelated phthalazin-1(2H)-ones (2-5) was prepared in high yields by a one-pot procedure, employing pyridazino[4,5-d]pyridazin-1(2H)-ones (1) as azadienes and cyclic enamines as dienophiles in an inverse-electron-demand Diels-Alder reaction, followed by acid-catalyzed aromatization.