Meso-pyrrole-substituted 22-oxacorroles: Building blocks for the synthesis of bodipy-bridged 22-oxacorrole dyads

Abstract

Novel boron-dipyrromethene (BODIPY)-bridged 22-oxacorrole dyads, using meso-pyrrolyl 22-oxacorrole as a key synthon, have been synthesized. The reactivity of the meso-pyrrolyl group of 22-oxacorrole was exploited to synthesize the first examples of BODIPY-bridged 22-oxacorrole dyads in ≈40 % yield. The dyads are stable and exhibited interesting spectral and electrochemical properties. BODIPY selecta! A class of novel BODIPY-bridged 22-oxacorrole dyads have been synthesized by exploiting the reactivity of the meso-pyrrole group of meso-pyrrolyl meso-free 22-oxacorrole (see scheme; ET=energy transfer).