在巴比妥酸衍生物的存在下,在咖啡酸酯的电解中观察到了有趣的氧化/迈克尔加成/氧化/螺环化顺序,从而合成了一系列新型螺环。在实验上简单而干净的程序中,通过将电子作为水溶液中唯一的试剂,而无需引入任何催化剂或氧化剂,通过电化学(E)和化学(C)事件的多米诺骨牌进行电解。从机理的角度来看,一种新型的多米诺机制(ECEC i,C i =螺环化)已被证明具有独特的C i在最后一步的现象。而且,根据实验和理论NMR研究,在这些合成电解中已检测到高度的化学选择性和区域选择性。
Direct electrosynthesis of a series of novel caffeic acid analogues through a clean and serendipitous domino oxidation/thia-Michael reaction
作者:A. Alizadeh、M. M. Khodaei、M. Fakhari、M. Shamsuddin
DOI:10.1039/c4ra02046d
日期:——
A series of novel caffeic acid analogues have been synthesized in an experimentally simple electrochemical procedure employing electrons as the only reagents in aqueous solution without introducing any catalyst or oxidant. It has been shown that the reactions proceed via a domino of electrochemical and chemical events (EC mechanism) with an interesting regioselectivity in the formation of arylsulfonyl-functionalized N-caffeoyl amides and caffeate esters. All products were purely obtained at the surface of anode (carbon rods) in excellent yields and no extra purification was needed. Structural characterization of these novel compounds was also performed using various spectroscopic techniques: FT-IR, 1HNMR, 13CNMR and HR-mass.
Structure−Activity Relationships of Cinnamate Ester Analogues as Potent Antiprotozoal Agents
作者:Freddy A. Bernal、Marcel Kaiser、Bernhard Wünsch、Thomas J. Schmidt
DOI:10.1002/cmdc.201900544
日期:2020.1.7
sub-tropical regions. Thus, in view of the lack of efficient therapies and increasing resistances against existing drugs, this study describes the antiprotozoal potential of synthetic cinnamate ester analogues and their structure-activityrelationships. In general, Leishmania donovani and Trypanosoma brucei were quite susceptible to the compounds in a structure-dependent manner. Detailed analysis revealed
Synthesis, Antibacterial Evaluation, and QSAR of Caffeic Acid Derivatives
作者:Marianna O. Araújo、Hilzeth L. Freire Pessoa、Andressa B. Lira、Yunierkis P. Castillo、Damião P. de Sousa
DOI:10.1155/2019/3408315
日期:2019.2.12
The present study evaluates the antibacterial effects of a set of 16 synthesized caffeic acid ester derivatives against strains of Staphylococcus aureus and Escherichia coli, as well as discusses their structure-activity relationship (SAR). The antibacterial assays were performed using microdilution techniques in 96-well microplates to determine minimal inhibitory concentration (MIC). The results revealed
The anticancer activities of alkyl esters and NO-donors of ferulic acid (FA) and caffeic acid (CA) were assessed by a high-throughout screening (HTS) method, and the structure–activityrelationships were described. CA alkyl esters had better anticancer activities than FA alkyl esters with the same alkyl substituent. Mono-nitrates and phenylfuroxan nitrates were more potent than the dual nitrates.
Antinociceptive properties of caffeic acid derivatives in mice
作者:Fátima de Campos Buzzi、Caroline Liandra Franzoi、Graziele Antonini、Mauricio Fracasso、Valdir Cechinel Filho、Rosendo Augusto Yunes、Rivaldo Niero
DOI:10.1016/j.ejmech.2009.06.029
日期:2009.11
Ten ester derivatives from caffeic acid were synthesized, and their antinociceptiveproperties are evaluated in mice. The most active compound, dodecyl ester derivative, exhibited potent and dose-related activity against the writhing test, with a calculated ID50 value of 15.1 (11.9–19.1) μmol/kg and MI of 78.8% being several times more active than reference drugs. It was also effective in other experimental