Coumarin synthesisPechmann reactionArrhenius equationDFTM06-2XCoumarin, which is an important material class of substrate in agricultural and pharmaceutical industries, can be obtained by the Pechmann condensation reaction. In this work, coumarin was synthesized from ethyl acetoacetate and resorcinol with ...
Define coumarin. coumarin synonyms, coumarin pronunciation, coumarin translation, English dictionary definition of coumarin. n. A fragrant crystalline compound, C9H6O2, present in tonka beans and produced synthetically for use as a fragrance. Coumarin ha
HeterogeneouscatalysisThe one-pot synthesis of 3,4-disubstituted coumarins from substituted 2-(hydroxymethyl)phenols with β-keto esters catalyzed by Mn3O4 ... Huayin,Sun,Yonghui,... - 《European Journal of Organic Chemistry》 被引量: 24发表: 2011年 One-Pot Synthesis of 3,4-Disubstituted Cou...
We report the synthesis of some new 8-heterocyclic coumarin derivatives. Novel compounds were synthesized by using resorcinol as a starting material and prepared 1, which on nitration gives compound 2, then it was reacted with Na metal & various alkyl, aryl halide or acetyl derivatives to give...
A lactone ring is formed between the resorcinol and the amino acids serine and cysteine [44]. Analogues of cyclothialidines are depicted in Fig. 9. Sign in to download hi-res image Fig. 9. Structures of cyclothialidine analogues [43]. Roche initiated research on total synthesis of cyclo...
ChemInform Abstract: Design, Synthesis and Biological Evaluation of Novel 7‐Mercaptocoumarin Derivatives as α1‐Adrenoceptor Antagonists.benzopyran derivativessubstitution reactionspyrazine derivativesreceptor binding activityStarting compound (I) is prepared in a 4-step sequence from resorcinol.doi:10.1002/...
One of the most interesting things of PUs is that their morphology can be regulated during the synthesis. Usually, PU moieties are formed by two different segments: hard segments (HS) and soft segments (SS). HS are mainly constituted by the urethane linkage between an isocyanate and a chain...
Chem.Res.Chin.Univ.2013,29(3),460-465doi:10.1007/s40242-013—2487-YSynthesisandFluorescencePropertiesofCoumarinGlycosidesandTriazoylglycosideswuZheng,FUXin.1ing,YANGNanandWANGQiu.an.CollegeofChemistryandChemicalEngineering,HunanUniversity,Changsha410082,PR.China2.SchoolofPharmaceuticalSciences,GuangxiMedicalUnive...
Coumarin synthesisPechmann reactionArrhenius equationDFTM06-2XCoumarin, which is an important material class of substrate in agricultural and pharmaceutical industries, can be obtained by the Pechmann condensation reaction. In this work, coumarin was synthesized from ethyl acetoacetate and resorcinol with ...
It is very interesting that the curves of 3-acetyl-4, 5-dihydroxycoumarin and 3-acetyl-4-hy-droxy-5-acetoxycoumarin were very similar to that of the resorcinol, when it was displ aced bathochromically. Information of the bacterial activity of coumarin derivtives will be presented at a ...