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,
Decarboxylative Tribromination for the Selective Synthesis of Tribromomethyl Ketone and Tribromovinyl Derivatives
作者:Aravindan Jayaraman、Eunjeong Cho、Jimin Kim、Sunwoo Lee
DOI:10.1002/adsc.201800851
日期:2018.10.18
Tribromomethyl ketone and tribromovinyl derivatives were selectively prepared from the decarboxylative tribromination. The reaction between propiolic acid derivatives and dibromoisocyanuric acid (DBCA)/H2O afforded predominantly a tribromomethyl ketonederivative in the presence of AgOAc (10 mol%). When the same reaction was conducted with 2,2,6,6‐tetramethyl‐1‐piperidinyloxy (TEMPO) instead of AgOAc
由脱羧三溴化作用选择性地制备三溴甲基酮和三溴乙烯基衍生物。在AgOAc(10mol%)存在下,丙酸衍生物与二溴异氰尿酸(DBCA)/ H 2 O之间的反应主要得到三溴甲基酮衍生物。当用2,2,6,6-四甲基-1-哌啶基氧基(TEMPO)代替AgOAc进行相同的反应时,仅以高收率形成了三溴乙烯基衍生物。发现乙炔基溴是中间体。
Copper-catalyzed decarboxylative C−P cross coupling of arylpropiolic acids with dialkyl hydrazinylphosphonates leading to alkynylphosphonates
ABSTRACT A facile and novel copper-catalyzed decarboxylative coupling of various arylpropiolic acids with readily available dialkyl hydrazinylphosphonates has been developed, providing an attractive synthetic tool for the synthesis of valuable alkynylphosphonates with operational simplicity and mild reaction conditions. GRAPHICAL ABSTRACT
Structurally sophisticated 2-phosphinobenzo[b]phosphole oxide frameworks have been conveniently constructed by cascade decarboxylative coupling and annulation reactions.
通过级联脱羧偶联和环化反应,构建了结构复杂的2-膦基苯并[b]膦杂环氧化物框架。
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