designed and synthesized to gain insight into the oxa‐6π electrocyclicreaction of cis,cis‐1,8‐dioxatetraene for the first time. The stability of the 1,8‐dioxatetraene intermediate is governed by its steric congestion and can be fine‐tuned through modification of the backbone structure, leading to the reactivity differences in the 6π electrocyclicreaction and the emergence of photochromic properties.
Iron-Catalyzed ortho-Selective Functionalization of Phenols: A Straightforward Strategy towards the 2′-Hydroxyphenyl-1,2-dione Skeleton
作者:Xingwei Guo、Wenjuan Li、Zhiping Li
DOI:10.1002/ejoc.201001180
日期:2010.10
An iron-catalyzed ortho-functionalization of phenols was developed. The reactions of simple phenols with alpha-hydroxy ketones provide a novel and efficient. method to construct 2';-hydroxyphenyl-1,2-dione derivatives.