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.
A series of 2-[2-(1-imidazolyl)ethyl]-4-phenylcycloalka[g]phthalazin-1(2H)-ones (3a-d) with variable cycloalkene ring size was prepared and tested in vitro for thromboxane A(2) synthase inhibitory activity.