One-Pot Synthesis of Iodo-Dibenzothiazines from 2-Biaryl Sulfides.

Herein, we report a metal-free and step-economic synthesis of iodo-dibenzothiazines from 2-biaryl sulfides under mild reaction conditions. The reaction involves sulfoximination of sulfides, intramolecular C-H amination, and iodization using cheap commercially available reagents. The products represent heterocyclic building blocks, readily modifiable by classical cross-coupling reactions.