Quarterly Journal of the Chemical Society of London, Volume 1, Pages 1-1364 |
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Page 610
... heated under reflux ( 2.75 hr . ) . The product was evaporated under reduced pressure and chromatographed on silica . Elution with benzene - ether ( 191 ) gave dimethyl 1,4 - diphenylnaphthalene - 2,3 - dicarb- oxylate ( 78 mg . , 30 ...
... heated under reflux ( 2.75 hr . ) . The product was evaporated under reduced pressure and chromatographed on silica . Elution with benzene - ether ( 191 ) gave dimethyl 1,4 - diphenylnaphthalene - 2,3 - dicarb- oxylate ( 78 mg . , 30 ...
Page 611
... heated under reflux under nitrogen atmosphere in the dark ( 17 hr . ) . The product was evap- orated under reduced pressure to give crystalline material ( 110 mg . ) , the n.m.r. spectrum of which showed no trace of the trans - adduct ...
... heated under reflux under nitrogen atmosphere in the dark ( 17 hr . ) . The product was evap- orated under reduced pressure to give crystalline material ( 110 mg . ) , the n.m.r. spectrum of which showed no trace of the trans - adduct ...
Page 664
... heated under reflux for 12 hr . with glacial acetic acid ( 120 ml . ) , 48 % aqueous hydrobromic acid ( 80 ml . ) , and water ( 20 ml . ) . The reaction mixture was worked up to furnish a brown acidic material which was heated under reflux ...
... heated under reflux for 12 hr . with glacial acetic acid ( 120 ml . ) , 48 % aqueous hydrobromic acid ( 80 ml . ) , and water ( 20 ml . ) . The reaction mixture was worked up to furnish a brown acidic material which was heated under reflux ...
Contents
By K C BASS and G M TAYLOR | 1 |
ether 100 ml was added slowly to a stirred solution | 4 |
Oxidative dimerisations of natural rethrolones and related compounds with manganese dioxide | 9 |
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Common terms and phrases
1,2-Benzoquinone acetic acid acetone added adduct aldehyde Amer amine aqueous ethanol aromatic atom azine benzanilide benzene benzyl bromide Calc carbonyl CH₂ Chem chloride chloroform chromatography cm.¹ compound crystallised cyclisation decomp decomposition derivatives dilute dimer distillation dried eluted ester ethanol ethyl acetate EtOH evaporated extracted with ether filtered Found fraction gave give heated under reflux hydrazine hydride hydrochloride hydrogen chloride hydrolysis i.r. spectrum imine iodide isolated ketone light petroleum b.p. lithium aluminium hydride log ɛ Mannich base mass spectrum MeOH methyl methylene mixed m.p. mmHg mmoles mole n.m.r. spectrum needles nitrogen nucleophilic Nujol obtained oxidation phenyl potassium protons pyridine quinone reaction mixture requires residue room temperature salt Scheme showed silica gel sodium hydroxide solution solvent spectra starting material stirred Table Tetrahedron washed white solid yield