Cyclization of N,N′‐Bis(Salicylidene)Diamines with Carbon Suboxide
摘要:
The reaction between N,N'-bis(salicylidene)diamines and carbon suboxide afforded dicoumarinoyl diamides in only one step and in yields that strictly depend on the methylene linkers between the salicylic moieties.
Synthesis and Antibacterial Activities of Novel 4-Hydroxy-7-hydroxy- and 3-Carboxycoumarin Derivatives
作者:Pen-Yuan Lin、Kuang-Sheng Yeh、Chien-Ling Su、Shiow-Yunn Sheu、Tiffany Chen、Keng-Liang Ou、Mei-Hsiang Lin、Lin-Wen Lee
DOI:10.3390/molecules170910846
日期:——
used as fluorescent dyes and medicines. They also have some notable physiological effects, including the acute hepatoxicity and carcinogenicity of certain aflatoxins, the anticoagulant action of dicoumarol, and the antibiotic activity of novobicin and coumerymycin A1. Because the number of drug resistant strains is increasing at present, the synthesis of new antibacterial compounds is one of the critical
Synthesis of novel coumarin and benzocoumarin derivatives and their biological and photophysical studies
作者:Alaa S. Abd-El-Aziz、Hany M. Mohamed、Shawkat Mohammed、Shamsulhaq Zahid、Athar Ata、Ahmed H. Bedair、Ahmed M. El-Agrody、Pierre D. Harvey
DOI:10.1002/jhet.5570440610
日期:2007.11
The reaction of 1-chloromethylbenzo[f]coumarins (36) with cyanide anion under different reaction conditions was also investigated in order to assess its suitability for nucleophilic substitution reactions as well as ring transformation products (43-49). Synthesis of 1-((benzo[d]thiazol-2-yl)methyl)-9-hydroxybenzo[f]coumarin (50) represented the first example of methylene bridge-head heterocyclecontaining
通过香豆素-3-羰基氯(1)与许多亲核试剂的反应已经制备了香豆素-3 N-羧酰胺的几种衍生物(3-21)。还使用相同的方法制备了新型双头香豆素-3 N-羧酰胺(26-33)。应用Pechmann-Duisberg反应制备新的苯并[ f ]-苯并[ h ]香豆素和4-(氯甲基)-吡喃并[3,2 - c ]香豆素-2-酮(36-42)。1-氯甲基苯并[ f ]香豆素的反应(36)还研究了在不同反应条件下与氰化物阴离子形成的阴离子,以评估其对亲核取代反应以及环转化产物的适用性(43-49)。1-((苯并[ d ]噻唑-2-基)甲基)-9-羟基苯并[ f ]香豆素(50)的合成代表了含亚甲基桥头杂环的苯并[ f ]香豆素的第一个实例。一些新制备的香豆素对革兰氏阳性和革兰氏阴性细菌表现出抗菌活性。发现化合物36d对所有经筛选的细菌具有活性。对选定的荧光苯并[ f ]-和苯并[ h ]进行了光物理研究
An efficient three-component synthesis of coumarin-3-carbamides by use of Ni–NiO nanoparticles as magnetically separable catalyst
作者:Nayim Sepay、Chayan Guha、Arpan Kool、Asok K. Mallik
DOI:10.1039/c5ra13932e
日期:——
An efficient and ecofriendly synthesis of coumarin-3-carbamides has been developed by a three-component reaction of 2-hydroxybenzaldehydes, aliphatic amines (p-/s-) and diethyl malonate using Ni–NiO nanoparticles as catalyst.
The reaction between N,N'-bis(salicylidene)diamines and carbon suboxide afforded dicoumarinoyl diamides in only one step and in yields that strictly depend on the methylene linkers between the salicylic moieties.