Novel Bifunctionalization of Activated Methylene: Base‐Promoted Trifluoromethylthiolation of β‐Diketones with Trifluoromethanesulfinyl Chloride
作者:Dong‐Wei Sun、Min Jiang、Jin‐Tao Liu
DOI:10.1002/chem.201901781
日期:2019.8.14
β-diketones or β-ketoesters with trifluoromethanesulfinyl chloride. A series of α-trifluoromethylthiolated α-chloro-β-diketones and α-chloro-β-ketoesters were obtained in moderate to good yields under mild conditions. When β-diketones containing a phenyl group with a hydroxyl or amino substituent at the ortho position were used as substrates, intramolecular trifluoromethylthiolation/cyclizationreaction took
Nickel-catalyzed oxidative esterification of formamides with 1,3-dicarbonyl compounds under mild reaction conditions
作者:Dariush Saberi、Samira Poorsadeghi
DOI:10.1002/aoc.3855
日期:2017.12
Synthesis of enol carbamates was achieved via nickel‐catalyzed oxidative coupling of formamides with 1,3‐dicarbonyl compounds in the presence of tert‐butyl hydroperoxide at 40 °C. Various derivatives of enol carbamates were synthesized by this method in good to excellent yields.
CuO nanoparticles supported on α-Fe2O3-modified CNTs: a magnetically separable catalyst for oxidative C–O coupling of formamides with 1,3-dicarbonyl compounds
作者:Dariush Saberi、Akbar Heydari
DOI:10.1016/j.tetlet.2013.05.113
日期:2013.8
Oxidative coupling of formamides with 1,3-dicarbonyl compounds to prepare enol carbamates was effected in the presence of CuO nanoparticles supported on alpha-Fe2O3-modified carbon nanotubes (CNTs@alpha-Fe2O3@CuO) as an environmentally friendly heterogeneous catalyst. The simple preparation, and the ability to be recycled and magnetically separated are salient features of this catalytic system. (C) 2013 Elsevier Ltd. All rights reserved.
Cramer; Elschnig, Chemische Berichte, 1956, vol. 89, p. 1,10
作者:Cramer、Elschnig
DOI:——
日期:——
Copper-Catalyzed Oxidative C–O Bond Formation of 2-Acyl Phenols and 1,3-Dicarbonyl Compounds with Ethers: Direct Access to Phenol Esters and Enol Esters
作者:Jihye Park、Sang Hoon Han、Satyasheel Sharma、Sangil Han、Youngmi Shin、Neeraj Kumar Mishra、Jong Hwan Kwak、Cheong Hoon Lee、Jeongmi Lee、In Su Kim
DOI:10.1021/jo500576x
日期:2014.5.16
A copper-catalyzed oxidative coupling of 2-carbonyl-substituted phenols and 1,3-dicarbonyl compounds with a wide range of dibenzyl or dialkyl ethers is described. This protocol provides an efficient preparation of phenol esters and enol esters in good yields with high chemoselectivity. This method represents an alternative protocol for classical esterification reactions.