A useful ring transformation route to novel thiazepino[7,6- b ]indoles from monochloro-β-lactam-fused 1,3-thiazino[6,5- b ]indoles, analogues of cyclobrassinin

Recent advances in β-lactam synthesis

During the past century, β-lactams have been identified as the core of penicillin and since then several strategies have been developed for their synthesis.