benzylidene-bis-(4-hydroxycoumarin) derivatives 5a-h and fused benzopyranocoumarin derivatives 6a-e were prepared by a sequence of reactions displayed in the Scheme 1. In the first step of the synthesis the aldol condensation of 4-hydroxycoumarin (1) with an appropriately substituted aldehyde (2) linker followed by the dehydration of aldol product (3) gave a chromone (4). Subsequent in situ reaction of the chromon with 4-hydroxycoumarin already excessively present in the reaction