Generation of arylcyclopenta-1,3-dienes from cyclopenteno-spiro-benzosultams: synthesis of 2-arylnorbornenes.

[摘要]：Aza-ortho-xylylenes generated by thermal extrusion of SO2 from cyclopenteno-spiro-benzisothiazoline 2,2-dioxides undergo [1,5]-sigmatropic H shift leading to unstable arylcyclopentadienes, which can be trapped with dienophiles to form arylnorbornenes.

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