5-dihydro-1-benzoxepine core. In contrast with previous reports exhibiting lengthy strategies, we demonstrate the shortest synthesis of radulanin A to date, featuring a largely unexplored photochemical ring expansion reaction of a 2,2-dimethylchromene precursor. This work was adapted to a continuous-flow setup for larger-scale preparation, in view of biological investigations into the herbicidal properties
radulanins 是具有
生物活性的
联苄基天然产物,具有合成具有挑战性的 2,5-dihydro-1-benzoxepine 核心。与之前展示冗长策略的报告相比,我们展示了迄今为止最短的 radulanin A 合成,其主要特征是 2,2-二甲基色烯前体的光
化学扩环反应。鉴于对这种天然产品的除草特性的
生物学研究,这项工作适用于大规模制备的连续流动装置。