Reactions of (1R,2S)-1,2-di(2-furyl)-1,2-di(3-guaiazulenyl)ethane and (1R,2S)-1,2-di(3-guaiazulenyl)-1,2-di(2-thienyl)ethane with tetracyanoethylene (TCNE) in benzene: comparative studies on the products and their spectroscopic properties

Reactions of the title meso forms 1 and 2 with TCNE in benzene at 25 °C for 5 h (for 1) and 48 h (for 2) under oxygen give new compounds 3 and 4, respectively, in 74 and 21% isolated yields. The title studies, affording interesting molecular structures 3 and 4, are reported.