Synthesis of Indolo-1,2-Benzothiazines from Sulfoximines and 3-Diazoindolin-2-imines,Advanced Synthesis & Catalysis

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Synthesis of Indolo-1,2-Benzothiazines from Sulfoximines and 3-Diazoindolin-2-imines
Advanced Synthesis & Catalysis ( IF 4.4 ) Pub Date : 2017-09-14 04:45:35 , DOI: 10.1002/adsc.201700764
Gi Hoon Ko ₁ , Jeong-Yu Son ₁ , Hyunseok Kim ₁ , Chanyoung Maeng ₁ , Yonghyeon Baek ₁ , Boram Seo ₁ , Kyusik Um ₁ , Phil Ho Lee ₁

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A rhodium-catalyzed cyclization reaction of sulfoximines with 3-diazoindolin-2-imines is described. This protocol provides a wide range of indolo-1,2-benzothiazines in moderate to excellent yields together with the release of molecular nitrogen and p-toluenesulfonamide. The present method involves the N–H/C–H activation of S-aryl sulfoximines and has the advantages of a broad substrate scope.

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