Direct irradiation of estrone aryl and methyl sulfonates in different organic solvents under nitrogen atmosphere was investigated under steady‐state conditions. The estrone derivatives reacted efficiently through the photo‐Fries rearrangement reaction involving [1;3]‐sulfonyl migration providing the ortho‐sulfonyl estrone derivatives and estrone as the photoproducts. In addition, estrone and 2‐arylsulfonyl estrone derivatives were epimerized involving a Norrish Type‐I reaction. Chemical quenching and photosensitization experiments on the photoreaction have been also carried out to establish the photoreactive excited state. Likewise, the solvent effect and the nature of the sulfonyl group on the photoreactions have been also studied.

中文翻译：

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某些雌酮芳基和甲基磺酸盐在溶液中的光化学行为：制备和机理研究

在稳态条件下研究了在氮气氛下不同有机溶剂中雌酮芳基酯和甲基磺酸酯的直接辐照。雌酮衍生物通过涉及 [1;3]-磺酰基迁移的 photo-Fries 重排反应有效地反应，提供邻磺酰基雌酮衍生物和雌酮作为光产物。此外，雌酮和 2-芳基磺酰基雌酮衍生物通过 Norrish I 型反应进行差向异构化。还进行了光反应的化学淬灭和光敏化实验，以建立光反应激发态。同样，还研究了溶剂效应和磺酰基对光反应的性质。