Photochemically generated bicyclic ortho-quinodimethanes: Photo-enolization of bicyclic aldehydes and ketones
作者:Terrence J. Connolly、Tony Durst
DOI:10.1016/s0040-4020(97)10068-0
日期:1997.11
A photoenolization route to bicyclic ortho-quinodimethanes was investigated. Bicyclic photoenols were trapped in an intermolecular fashion with various dienophiles for the first time. All ortho-quinodimethane precursors were prepared via a selective route commencing with 1-indanol, α-tetralol and 1-benzosuberone. Irradiation afforded the E-photoenols exclusively which were trapped with equal efficiency
研究了双环邻喹啉二甲烷的光烯化路线。首次以分子间方式将双环光烯醇与各种亲二烯体一起捕获。通过从1-茚满醇,α-四醇和1-苯并亚砜开始的选择性路线制备所有邻-喹二甲烷前体。辐照提供了E-单独捕获具有相同效率的-光烯醇,但其衍生自茚满-4-羧醛。这种低效率归因于醛快速自氧化为羧酸。与本研究中的其他醛相比,苯并suberan-9-羧醛的光烯醇与富马酸二甲酯之间反应的面部选择性要低得多。由七元环的存在引起的扭曲的二烯解释了这些结果。