Oxygenation reactions with molecular oxygen (O2) as the oxygen source provides a green and straightforward strategy for the construction of O‐containing compounds. Demonstrated here is a novel N‐heterocyclic carbene (NHC) catalyzed oxidative transformation of simple and readily available organic halides into valuable esters through the incorporation of O‐atomsfromO2. Mechanistic studies prove that
Mechanistic Studies on Alcoholysis of α-Keto esters
作者:Song-Ei Song、Bum Hee Lim、Kwan Woo Han、Tae Jun Park、Bong Ser Park
DOI:10.5012/bkcs.2014.35.12.3423
日期:2014.12.20
hemi-acetal of the keto carbonyl of 1a. Such a reaction pathwayfor the alcoholysis of α-keto esters has not been documentedin the literature to the best of our knowledge. Here we reportour preliminary findings on the unprecedented reactionpathway.A hint that the above reaction may not have occurred bydirect methanolysis of the ester group was given to us whena
Transition-Metal-Free Formal Decarboxylative Coupling of α-Oxocarboxylates with α-Bromoketones under Neutral Conditions: A Simple Access to 1,3-Diketones
作者:Zhen He、Xiaotian Qi、Shiqing Li、Yinsong Zhao、Ge Gao、Yu Lan、Yiwei Wu、Jingbo Lan、Jingsong You
DOI:10.1002/anie.201409361
日期:2015.1.12
A transition‐metal‐free formaldecarboxylativecoupling reaction between α‐oxocarboxylates and α‐bromoketones to synthesize 1,3‐diketone derivatives is presented. In this reaction, a broad scope of substrates can be employed, and neither a metal‐based reagent nor an additional base is required. DFT calculations reveal that this reaction proceeds through a coupling followed by decarboxylation mechanism