The reaction of cinnamonitriles (2a,b) with 5-dimethylaminosulfonyl-8- quin
olinol (1) gave the corresponding pyranoquinoline derivatives (3a,b). The l
atter derivatives are used in the synthesis of pyridol[2',3':6,5]pyrano[3,2
-h]quinolines and pyrimido[4',5':6,5]pyrano[3,2-h]quinolines.