Synthetic Strategies for Accessing Dibenzophosphole Scaffolds

Dibenzophospholes, phosphorus-containing ?-conjugated cyclic compounds, have attracted considerable attention because of their potential applications in various functional materials such as those required for organic electroluminescent devices. Moreover, their synthetic methods have been widely developed. This review summarizes the construction strategies of dibenzophosphole scaffolds, including those developed recently. 1 Introduction 2 Construction of a Phosphole Skeleton Using Aryl Compounds 2.1 [4+1] Cyclization between Biaryl Derivatives and P1 Units 2.2 Intramolecular P C Bond Formation of Biarylphosphines 2.3 Intramolecular C C Bond Formation of Diarylphosphines 2.4 [3+2] Cyclization between Arylphosphines and Arenes 3 Fused-Benzene Ring Formation 4 Successive Phosphole Skeleton and Fused-Benzene Ring Formation 5 Conclusions.