A new directing group assisted method for the synthesis of aryl esters is described. In this Cu(II)-mediated reaction, 2-formylphenols and 2-acetylphenols are easily converted to the aryl esters by treatment with a new aroylating agent 2-bromoacetophenone. In addition, a new external bromine free method for the synthesis of important synthons 2,2-dibromoacetophenones from 2-bromoacetophenones is described
作者:Gabriela Maciel Diogo、Josimara Souza Andrade、Policarpo Ademar Sales Junior、Silvane Maria Fonseca Murta、Viviane Martins Rebello Dos Santos、Jason Guy Taylor
DOI:10.3390/molecules25020397
日期:——
rates in the chronic phase. Furthermore, strong side effects may result in discontinuation of this treatment. Faced with this situation, we report the synthesis and trypanocidalactivity of 3-benzoyl-flavanones. Novel 3-benzoyl-flavanone derivatives were prepared in satisfactory yields in the 3-step synthetic procedure. According to recommended guidelines, the whole cell-based screening methodology
Rational Design for Multicolor Flavone-Based Fluorophores with Aggregation-Induced Emission Enhancement Characteristics and Applications in Mitochondria-Imaging
作者:Liyan Liu、Yaohui Lei、Jianhui Zhang、Na Li、Fan Zhang、Huaqiao Wang、Feng He
DOI:10.3390/molecules23092290
日期:——
Fluorophores with aggregation-inducedemission enhancement (AIEE) properties have attracted more attention in recent years. In order to realise more valuable applications, the different kinds of AIEE molecules are in serious need of further development. Therefore, a novel flavone-based AIEE system derived from restriction of intramolecular rotation (RIR) was designed and synthesized in this work. The
A One-Pot Synthesis of 2-Amino- and 2-(Arylamino)-Substituted Thiazoles and Selenazoles using [Hydroxy(tosyloxy)iodo]benzene, Carbonyl Compounds and Thioureas or Selenoureas: A Modification of the Hantzsch Synthesis
作者:Robert M. Moriarty、B. K. Vaid、M. P. Duncan、Stuart G. Levy、O. Prakash、S. Goyal
DOI:10.1055/s-1992-26243
日期:——
A one-pot synthesis of 4-substituted 2-amino- or 2-(arylamino)thiazoles has been achieved via treatment of ketones with [hydroxy(tosyloxy)iodo]benzene and thioureas in refluxing acetonitrile. 1,3-Dicarbonyl compounds yield (5-acyl-4-methylthiazol-2-yl)-ammonium tosylates and the corresponding selenazol-2-yl compounds, respectively, upon reaction with [hydroxy(tosyloxy)iodo]benzene followed by the addition of thiourea or selenourea. The tosylate salts are converted to the corresponding free bases by treatment with sodium bicarbonate. This synthesis is an important modification of the Hantzsch synthesis.