One-Pot Synthesis of Benzo[1,4]thiazin-3(4<i>H</i>)‑ones and a Theoretical Study of the S–N Type Smiles Rearrangement Mechanism

Benzo­[1,4]­thiazin-3­(4<i>H</i>)-one derivatives are conveniently prepared in one pot via a Smiles rearrangement (SR) tandem reaction. In order to understand the reaction, we present here a theoretical study on the S–N type SR mechanism.