Metal-Free Decarboxylative Trichlorination of Alkynyl Carboxylic Acids: Synthesis of Trichloromethyl Ketones
作者:Aravindan Jayaraman、Eunjeong Cho、Francis Mariaraj Irudayanathan、Jimin Kim、Sunwoo Lee
DOI:10.1002/adsc.201701116
日期:2018.1.4
arylpropiolic acids and trichloroisocyanuric acid (TCCA). The reaction was performed in the presence of water at room temperature, and the desired products were obtained in good yields. The reaction showed good functional group tolerance towards halide, cyano, nitro, ketone, ester and aldehyde groups. In addition, the 2,2,2‐trichloroacetophenone derivatives were readily transformed into esters, amides,
Continuous flow reaction system for the synthesis of 2,2,2-trichloroacetophenone derivatives and its application
作者:Byeng Ha Ko、Subeen Yu、Kwang Ho Song、Sunwoo Lee
DOI:10.1016/j.tetlet.2018.01.067
日期:2018.3
A continuous flow reaction system was developed for the synthesis of 2,2,2-trichloroacetophenone derivatives. When aryl propiolic acids and water were mixed with trichloroisocyanuric acid in DMF at 5 °C, the 2,2,2-trichloroacetophenone derivatives were formed within 5 min with good yields. In addition, the resulting mixture was flowed to react with amines to give the corresponding benzamide. This flow
Transition-Metal-Free Transformation of Aryl Bromides into Aromatic Esters and Amides via Aryl Trichloromethyl Ketones
作者:Souya Dohi、Katsuhiko Moriyama、Hideo Togo
DOI:10.1002/ejoc.201301170
日期:2013.12
Arylbromides have been treated with Mg and then chloral, followed by tBuOCl or tBuOCl with I2 as an additive, and subsequently alcohols or amines to form the corresponding aromaticesters and aromaticamidesviaaryltrichloromethylketones as intermediates.
Oxyhalogenation reactions of a variety of alkynylsilanes were studied using oxone as mild oxidant and KCl, KBr, and KI as halogen sources. In this study, reaction of an alkynylsilane with oxone-KX (X = Cl or Br) produced trichloromethyl/tribromomethyl ketones in high yields. Under similar conditions, however, reactions of alkynylsilanes with oxone-KI were found to give exclusively 1,2,2-triiodovinyl
Reduction of 2,2,2-trichloro-1-arylethanones by RMgX: mechanistic investigation and the synthesis of substituted α,α-dichloroketones
作者:Ali H. Essa、Reinner I. Lerrick、Floriana Tuna、Ross W. Harrington、William Clegg、Michael J. Hall
DOI:10.1039/c3cc39147g
日期:——
2-Trichloro-1-arylethanones undergo high yielding reductions to the corresponding 2,2-dichloro-1-arylethanones in the presence of RMgX. A single electron transfer mechanism for the reaction is proposed based on trapping experiments. Reaction of the intermediate enolates with a range of electrophiles is described, providing a convenient route to substituted alpha,alpha-dichloro-beta-hydroxyketones and related