Dioxa-[40]decaphyrin(1.0.1.0.0.1.0.1.0.0): An analogue of turcasarin with a “figure-eight” structure

The synthesis and characterization of two different furan containing analogues of turcasarin, namely 46,51 -dioxa-2,11,15,20,24,33,37,42-octapropyl-turcasarin (7a) and 46,51 -dioxa-2,11,24,33-tetrapropyl-15,20,37,42-tetraethyl-16,19,38,41-tetramethyl-turcasarin (7b) are described. While 7a was found to exhibit a “figure eight” structure in solution and in the solid state, 7b is believed to adopt a different, more symmetric conformation is solution.