[1]Benzopyrano[2,3,4-i,j]isoquinolines: a new, versatile route from 1-bromoxanthones

[1]Benzopyrano[2,3,4-i,j]isoquinolines were synthesized from a bromoxanthone by assembly of the isoquinoline ring in three steps: vinylation, hydroamination and ring-closing reduction of the xanthone carbonyl.