Quarterly Journal of the Chemical Society of London, Volume 1, Pages 1-1364 |
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Page 309
... dried and evaporated ; crystallisation of the residue from meth- anol gave isorotenol ( 0 · 50 g . ) , m.p. 132 ° ( lit. , 9 m.p. 133 ° ) . The acidic fraction was acidified and extracted with ether . The dried ether extracts yielded an ...
... dried and evaporated ; crystallisation of the residue from meth- anol gave isorotenol ( 0 · 50 g . ) , m.p. 132 ° ( lit. , 9 m.p. 133 ° ) . The acidic fraction was acidified and extracted with ether . The dried ether extracts yielded an ...
Page 482
... dried ( MgSO1 ) , and evaporated to dryness . The desired pyrrole ( 2 · 71 g . , 98 % ) slowly solidified , and was recrystallised from methylene chloride - light petroleum to give material m.p. 41-42 ° ( Found : C , 67-6 ; H , 6-65 ; N ...
... dried ( MgSO1 ) , and evaporated to dryness . The desired pyrrole ( 2 · 71 g . , 98 % ) slowly solidified , and was recrystallised from methylene chloride - light petroleum to give material m.p. 41-42 ° ( Found : C , 67-6 ; H , 6-65 ; N ...
Page 543
... dried ( MgSO1 ) , evaporated , and the resi- due was chromatographed on alumina with chloroform as eluant . When the eluate was almost colourless , the column was eluted with chloroform - methanol ( 9 : 1 ) , and the purple fraction was ...
... dried ( MgSO1 ) , evaporated , and the resi- due was chromatographed on alumina with chloroform as eluant . When the eluate was almost colourless , the column was eluted with chloroform - methanol ( 9 : 1 ) , and the purple fraction was ...
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