CO bond formation between terminal alkenes/benzyl alcohols as an arylcarboxy surrogate and carbonyl compounds in a biodegradable deep eutectic solvent (DES) based on choline chloride and urea was performed. By employment of TBAI as catalyst and TBHP as oxidant, various derivatives of carbonyl compounds were benzylated in α position in good to high yield at 90 °C. Moreover, α-oxybenzoylation of diethyl
Bu<sub>4</sub>NI-Catalyzed α-Oxyacylation of Carbonyl Compounds with Toluene Derivatives
作者:Chengliang Li、Tao Jin、Xinglu Zhang、Chunju Li、Xueshun Jia、Jian Li
DOI:10.1021/acs.orglett.6b00749
日期:2016.4.15
A TBAI (tetrabutylammonium iodide)-catalyzed direct α-oxyacylation of carbonylcompounds from readily available toluene derivatives has been developed. The distinguished features of this metal-free protocol include the employment of simple starting material, a wide carbonylcompound scope, and mild reaction conditions.
Rh<sub>2</sub>(esp)<sub>2</sub>: An Efficient Catalyst for O-H Insertion Reactions of Carboxylic Acids into Acceptor/Acceptor Diazo Compounds
作者:Arianne C. Hunter、Kiran Chinthapally、Indrajeet Sharma
DOI:10.1002/ejoc.201600064
日期:2016.5
Rh2(esp)2 has been identified as a highly efficient catalyst for O–H insertion of carboxylic acids into acceptor/acceptor diazocompounds. The insertion reaction proceeds in CH2Cl2 within minutes at room temperature in excellent yields and accommodates carboxylic acids having varying functionalities including amino acids, free alcoholic and phenolic O–H, indole N–H, alkenes, alkynes, and substituted
TBAI-catalyzed oxidative coupling of β-ketoesters with carboxylic acid: synthesis of α-carboxylic-β-ketoesters
作者:Xiaoqing Li、Can Zhou、Xiangsheng Xu
DOI:10.3998/ark.5550190.0013.913
日期:——
TBAI-catalyzedoxidativecoupling of β-ketoesters with carboxylicacid using TBHP as oxidant has been established. This transformation provides a facile and direct strategy for the synthesis of α-carboxylic-β-ketoesters.