π-Rich σ2P-Heterocycles: Syntheses, Reactivity, and Application Potential of 1,3-Benzazaphospholes

1H-1,3-Azaphospholes and their benzo-fused derivatives are a particular class of aromatically stabilized σ2P heterocycles1,2 that differ from the well-known phosphabenzenes1a,3 and other types of a...