Quarterly Journal of the Chemical Society of London, Volume 1, Pages 1-1364 |
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Page 517
... further quantity ( 2 g . ) of crude antibiotic was obtained after concentration of the mother liquors followed by chromatography of the resulting oil on an alumina column ( grade H ; 200 g . ) , with ethyl acetate as eluant . Partial ...
... further quantity ( 2 g . ) of crude antibiotic was obtained after concentration of the mother liquors followed by chromatography of the resulting oil on an alumina column ( grade H ; 200 g . ) , with ethyl acetate as eluant . Partial ...
Page 620
... further 3 days , but no appreciable change was observed ( t.l.c. ) . The mixture was worked up in the usual manner to give a mobile syrup , containing several components , which was not further examined . 1,2 : 5,6 - Di - O ...
... further 3 days , but no appreciable change was observed ( t.l.c. ) . The mixture was worked up in the usual manner to give a mobile syrup , containing several components , which was not further examined . 1,2 : 5,6 - Di - O ...
Page 1146
... further 24 hr . at 40 ° . The reaction was quenched with water and continuously extracted with ether for 16 hr . The extract was filtered through grade III alumina ( 60 g . ) with light petroleum . The first 100 - ml . of filtrate ...
... further 24 hr . at 40 ° . The reaction was quenched with water and continuously extracted with ether for 16 hr . The extract was filtered through grade III alumina ( 60 g . ) with light petroleum . The first 100 - ml . of filtrate ...
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