Synthesis of 2 H-1, 2-Benzothiazine 1, 1-Dioxides via Heteroannulation Reactions of 2-Iodobenzenesulfonamide with Ketone Enolates under SRN1 Conditions §

WJ Layman, TD Greenwood, AL Downey…

Index: Fontan, Rafael; Galvez, Carmen; Viladoms, Pere Heterocycles, 1981 , vol. 16, # 9 p. 1473 - 1474

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Citation Number: 28

Abstract

... Volume: Page: ... or 3,4-disubstituted-2H-1,2-benzothiazine 1,1-dioxides 2, whereas ester enolates would afford 2H-1,2-benzothiazin-3(4H)-one 1,1-dioxides 3. These heterocyclic annulation reactions ... 4, butanone, 15, 2c (R = H, R' = Et); 2d (R = R' = Me), 31; d 16, 9. ...

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