Novel generation of 9H-furo3,2-bchromen-9-ones from (E)-3-hydroxy-2-styrylchromones by excited state intramolecular proton transfer

摘要

到产量的代替的(E)-3-hydroxy-2-(1 鈥 ?methyl-2 鈥 ?phenylvinyl)-4-oxo-4H-1-benzopyrans 的 Photocyclisation 线性新奇 tricyclic 9H-furo [3,2-b ] chromen-9-ones 和尖熔化 tetracyclic xanthenones 被描述。