Dithienylethene‐Based Photochromic Siloles: A Straightforward and Divergent Synthetic Strategy

A straightforward synthetic methodology for the preparation of photochromic siloles based on dithienylethene motif is developed. It relies upon an efficient palladium-catalyzed annulation reaction a 2,3-bis(3-thienyl)-silirene with terminal alkynes in mild conditions. The functional group-tolerant and can be performed high yields variety alkynes. even extended to polymeric polypropargylmethacrylamide (PPMA) substrate affording corresponding polymer different degree unit incorporation by simply adjusting polymer/ silirene stoichiometric ratio.