| Abstract: | Naphtho1,2-b]furans 1a-f, naphtho2,1-b]furans 2a-f, benzo1,2-b:5,4-b′]difurans 3a-b, benzo1,2-b:4,5-b′]difurans 4a-b, and benzo1,2-b:4,3-b′]difurans 5a-b were synthesized by base-catalyzed cyclization reaction of the corresponding o-alkoxybenzoylarene derivatives. The o-alkoxybenzoylarenes were obtained from the etherification reaction of the o-hydroxybenzoylarenes, which were prepared either by the reaction of methoxyarenes with benzoyl chloride in the presence of aluminum chloride or by photo-Fries rearrangement of aryl benzoates. |
