Iron (III)‐Promoted Synthesis of Substituted 4H‐Chalcogenochromenes and Chemoselective Functionalization

Abstract The iron(III)‐promoted synthesis of densely‐substituted 4 H ‐chalcogenchromene from organochalcogen propargylamines in the presence of diaryl dichalcogenides is reported. Subsequent C2‐functionalization with electrophiles and potassium trifluoroborate salts via Suzuki‐Miyaura coupling reaction are also presented. A plausible mechanism based on HRMS experiments is proposed and discussed. magnified image