Abstract The 1,2-dibromoethane- and KI-mediated α-acyloxylation of ketones is reported in moderate to good yield without the use of transition metals and strong oxidants. Various acids are well tolerated with wide functional group compatibility. An 1,2-dibromoethane- and KI-catalysed reaction mechanism is proposed based on the results of control experiments.
<i>tert</i>-Butyl Nitrite: Organic Redox Cocatalyst for Aerobic Aldehyde-Selective Wacker–Tsuji Oxidation
作者:Xiao-Shan Ning、Mei-Mei Wang、Chuan-Zhi Yao、Xian-Min Chen、Yan-Biao Kang
DOI:10.1021/acs.orglett.6b01165
日期:2016.6.3
An aldehyde-selective aerobic Wacker–Tsuji oxidation is developed. Using tert-butylnitrite as a simple organic redox cocatalyst instead of copper or silver salts, a variety of aldehydes were achieved as major products in up to 30/1 regioselectivity as well as good to high yields at room temperature.
Oxidative C–H Acyloxylation of Acetone with Carboxylic Acids under Iodine Catalysis
作者:Xiao-Yu Zhou、Xia Chen
DOI:10.1055/a-1336-5720
日期:2021.5
Iodine-catalyzed oxidative C(sp3)–H acyloxylation of acetone with carboxylic acids has been developed. The method employs iodide as catalyst and sodium chlorite as oxidant. Substituted benzoic acids, naphthoic acids and heteroaromatic carboxylic acids can be used, and 2-oxopropyl carboxylates are obtained with good to excellent yields.