Synthesis of 2-Acylphenol and Flavene Derivatives from the Ruthenium-Catalyzed Oxidative C-H Acylation of Phenols with Aldehydes
作者:Hanbin Lee、Chae S. Yi
DOI:10.1002/ejoc.201403518
日期:2015.3
[(C6H6)(PCy3)(CO)RuH]+BF4- has been found to be an effective catalyst for the oxidativeC-H coupling reaction of phenols with aldehydes to give 2-acylphenol compounds. The coupling of phenols with α,β-unsaturated aldehydes selectively gives the flavenederivatives. The catalytic method mediates direct oxidativeC-H coupling of phenol and aldehyde substrates without using any metal oxidants or forming wasteful byproducts
Facile Synthesis of 2H-Benzo[h]Chromenes via an Arylamine-Catalyzed Mannich Cyclization Cascade Reaction
作者:Yueteng Zhang、Peng Ji、Xiang Meng、Feng Gao、Fanxun Zeng、Wei Wang
DOI:10.3390/molecules26123617
日期:——
Mannich-cyclization cascade reaction was developed for facilesynthesis of substituted 2H-benzo[h]chromenes. The notable feature of the process included the efficient generation of ortho-quinone methides (o-QMs) catalyzed by a simple aniline. The mild reaction conditions allowed for a broad spectrum of 1- and 2-naphthols and trans-cinnamaldehydes to engage in the cascade sequence with high efficiency.
开发了一种简单的芳胺催化曼尼希环化级联反应,用于轻松合成取代的 2 H-苯并[ h ]色烯。该过程的显着特点包括在简单的苯胺催化下有效生成邻醌甲基化物( o -QM)。温和的反应条件允许广谱的1-和2-萘酚以及反式肉桂醛高效地参与级联序列。