Copper‐Catalyzed Constructions of 4‐(2‐Arylhydrazono) isochroman‐3‐imines from 4‐Diazoisochroman‐3‐imines and Arylboronic Acids

A novel copper‐catalyzed reaction of 4‐diazoisochroman‐3‐imines and arylboronic acids is reported. This transformation efficiently yields 4‐(2‐aryl)hydrazono)isochroman‐3‐imines under mild reaction conditions, showcasing excellent substrate scope and functional group tolerance. Additionally, the versatility of this approach extends to other cyclic diazo compounds, broadening its applicability.