A cascade annulation strategy triggered by rhodium(III)-catalyzed C–H activation has been reported for the expeditious assembly of pyrrolidinedione-fused 1,2-benzothiazines from free NH-sulfoximines with maleimides under mild conditions. Without the need for inert atmosphere protection, a broad range of sulfoximines with maleimides were well tolerated, producing diverse fused-thiazine derivatives in moderate to good yields. Additionally, the late-stage transformation of the target product demonstrated the potential synthetic value of this protocol.

中文翻译：

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铑催化级联 C-H 激活/成环策略，用于快速组装吡咯烷二酮稠合 1,2-苯并噻嗪

据报道，由铑( III )催化的C-H活化触发的级联环化策略可在温和条件下从游离NH-亚磺酰亚胺与马来酰亚胺快速组装吡咯烷二酮稠合的1,2-苯并噻嗪。无需惰性气氛保护，多种亚磺酰亚胺与马来酰亚胺的耐受性良好，能够以中等至良好的产率产生多种稠合噻嗪衍生物。此外，目标产物的后期转化证明了该方案的潜在合成价值。