Synthesis of dibenzothiazines from sulfides by one-pot N,O-transfer and intramolecular C-H amination

摘要

Herein, we report a metal-free and step-economic synthesis of dibenzothiazines from 2-biphenyl sulfides under mild reaction conditions. The reaction involves a sulfoximination of sulfides and intramolecular C-H amination using readily available reagents (NH4)(3)PO4 center dot 3H(2)O as the N-source, PhI(OAc)(2) as the oxidant and DMF as the solvent.