Claisen-Schmidt condensation
A Convenient Base-Mediated Diastereoselective Synthesis of 2-Oxo-N,4,6-triarylcyclohex-3-enecarboxamides via Claisen-Schmidt Condensation
... via Claisen-Schmidt condensation and Michael reaction for the preparation of highly functionalized cyclohexenones is illustrated in the Scheme ...via Claisen- Schmidt ...
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The Influence of Nitro Group on Synthesis of (E) 1 (4 Methoxyphenyl) 3 phenylprop 2 en 1 on Derivatives via Claisen Schmidt Condensation
... of Claisen-Schmidt condensation that are chalcone derivative (4b) and β-hydroxyketone compounds (3b) because of the elimination step was not ...
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Synthesis and characterization of some new pyrazolines derivatives and their biological activity
... the Claisen – Schmidt condensation reaction and the prazoles derivatives have been synthesized by the treatment of the appropriate chalcones ( 1-VI ) with hydrazinehydrate, phenylhydrazine, ...
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“On Water” Organic Synthesis: One pot Facile Regioselective Synthesis of (1E,4E)-1,5-bis-aryl-penta-1, 4-dien-3-ones using an Alternative Precursor
... traditional Claisen- Schmidt condensation procedure utilizing ketone, NaOH or KOH and aqueous alcohols for one pot preparation of diarylethenes such as 7a-g while applied to synthesis of ...
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Modified dowex-50 W-promoted synthesis of chalcones containing hydroxyl and nitro groups
... Preparation of Chalcones: 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 The preparation of chalcones were carried out using Claisen-Schmidt condensation methodology using equimolar amo[r] ...
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Chalcone & their heterocyclic analogue: A Review Article
... Chalcones possess conjugated double bonds and a completely delocalized Π-electron system on both benzene rings. Molecules possessing such system have relatively low redox potentials and have a greater probability of ...
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Synthesis and evaluation of some pyrazoline derivatives as anticancer agents
... The compound (3) was synthesized by reaction of 2-bromo-1-(3-bromo-2-hydroxy-5-methylphenyl)ethanone(1) with p-aminoacetophenone(2) in refluxing acetone as shown in Scheme 1. Chalcone derivatives (4a-e)were prepared ...
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SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL EVALUATION OF NEW DIHYDROPYRIMIDINONES CHALCONES
... by condensation of urea, acetylacetone with different aldehydes in presence citric acid at 80 o c ...by Claisen-Schmidt condensation, aryl ketone (1j) condensed with different aldehydes in ...
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Synthesis and characterization of heterocyclic chalcones containing halogenated thiophenes
... under Claisen-Schmidt condensation by reaction between heterocyclic aldehydes (5-7) namely, 5-bromothiophene-2- carbaldehyde, 3-methyl-2-thiophencarboxaldehyde and 2-thiophenecarboxaldehyde with ...
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Synthesis, Characterization and Antibacterial Evaluation of Some Azole Derivatives
... • Emergence of azalea resistant strains led to the development of new antimicrobial compounds. In view of this, a novel series of azole derivatives have been synthesized using Claisen-Schmidt ...
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Synthesis and Biological Activity of Novel 2,5-Dichloro-3-Acetylthiophene Chalcone Derivatives
... by Claisen-Schmidt condensation and evaluated for them in vitro antifungal, antitubercular activities and cytotoxic activity against DU145 (prostate) cancer cell ...
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Synthesis, Spectral Study, Characterization and Antimicrobial Activity of Zinc (II) Complex of Chalcone of Pyridine 2 Carbaldehyde
... the Claisen-Schmidt condensation method of 2,6-dihydroxy acetophenone and ...by Claisen-Schmidt condensation method and synthesize Zn(II) metal complex and characterize them by ...
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Aspects of Meson Condensation
... kaon condensation in the framework of chiral per- turbation theory is ...pion condensation phase and the kaon condensation phase are ...pion condensation phases are studied, finding a nonmono- ...
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An Abstract Condensation Property
... page 0131 An Abstract Condensation Property Thesis by David Law In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy California Institute of Technology Pasadena, Californi[.] ...
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Novel Variants of the Zwitterionic Claisen Rearrangement and the Total Synthesis of Erythronolide B
... In the previous chapter, we developed a ketene-Claisen rearrangement that was susceptible to Lewis acid catalysis, and effective with a range of allylic pyrrolidines. The synthetic utility of this method, however, ...
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An asymmetric pericyclic cascade approach to 3 alkyl 3 aryloxindoles : generality, applications and mechanistic investigations
... The hetero-Claisen approach to oxindoles using N- phenylnitrones and diphenylketene was first reported by Staudinger 22 and subsequently investigated by Lippman 23 and Taylor. 24 Despite its synthetic potential, ...
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A forward regression algorithm based on M estimators
... estimator can enhance model parameter robustness in bad data conditions such as outliers, the proposed algorithm in this work is a variant of modified Gram-Schmidt procedure that includes the IRLS inner loop so as ...
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Sequence and functional differences between Schmidt-Ruppin D and Schmidt-Ruppin A strains of pp60v-src.
... We discovered that chimeric v-srclc-src plasmids expressing Schmidt-Ruppin D SRD amino region coding sequences combined with c-src carboxyl region sequences had significantly lower focus[r] ...
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Hilbert–Schmidt Frames: Duality, Weaving and Stability
... In this paper, we give some sufficient conditions under which perturbations preserve Hilbert-Schmidt frames. Also show that the canonical dual of a perturbed Hilbert-Schmidt frame is a perturbation of the ...
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Part A: Palladium(II)-Catalyzed Enantioselective Saucy-Marbet Claisen Rearrangement of Propargyloxy indoles to Quaternary Oxindoles and Spirocyclic Lactones. Part B: The Regioselective Oxidative Coupling of Phenols .
... Palladium(II)-Catalyzed Enantioselective Saucy-Marbet Claisen Rearrangement of Propargyloxy Indoles to Quaternary Oxindoles and Spirocyclic Lactones .... Natural Products an[r] ...
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