Quarterly Journal of the Chemical Society of London, Volume 8, Pages 1365-2022 |
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Page 1529
... separated by filtration of the concentrated chloroform phase through alumina in chloroform which afforded the 5 - oxo - isomer . The 7 - oxo- isomer was obtained by further elution with ethanol- chloroform ( 1 : 3 to 3 : 1 ) . Method E ...
... separated by filtration of the concentrated chloroform phase through alumina in chloroform which afforded the 5 - oxo - isomer . The 7 - oxo- isomer was obtained by further elution with ethanol- chloroform ( 1 : 3 to 3 : 1 ) . Method E ...
Page 1622
... separated off , washed with ether , and dried . A yellow- brown powder ( 19 g . ) , m.p. 190-220 ° , was obtained . The two stable 1 : 2 adducts were separated by column chro- matography ( 500 g . Hopkin and Williams silica gel M.F.C. ...
... separated off , washed with ether , and dried . A yellow- brown powder ( 19 g . ) , m.p. 190-220 ° , was obtained . The two stable 1 : 2 adducts were separated by column chro- matography ( 500 g . Hopkin and Williams silica gel M.F.C. ...
Page 1789
... separated during fractionation since no methyl sugar could be detected in the solution which was obtained on eluting the anion exchange resin column . The neutral fraction was found to contain , by paper chromatographic examination , 2 ...
... separated during fractionation since no methyl sugar could be detected in the solution which was obtained on eluting the anion exchange resin column . The neutral fraction was found to contain , by paper chromatographic examination , 2 ...
Contents
Organic chemistry | 1365 |
Substituted oxindoles Part IV 3Alkylation of 1methylindol23Hone 1methyloxindole | 1375 |
Contents iii | 1377 |
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1-phosphate absorption acetic acid acetic anhydride acetone added adduct alcohol alkyl Amer amine anhydride anhydrous aqueous aromatic atom benzene bromide Calc carbonyl CH₂ Chem chloride chloroform chromatography cm.¹ compound conj cooled crystallised cyclohexanone cyclopentadiene derivatives deuterium diene dimethyl dimethylbutadiene distilled dried eluted ester ethanol ethyl acetate evaporated extracted with ether filtered Found fraction gave give heated under reflux hydrazine hydride hydrochloric hydrogen carbonate hydrolysis hydroxide i.r. spectrum iodide isolated isomer ketone light petroleum mass spectrum methyl methylene mixed m.p. mmHg mole n.m.r. spectrum needles nitrogen obtained olefin oxalylindene oxide petroleum petroleum b.p. phosphate potassium prepared protons pyridine quinone reaction rearrangement reduced pressure requires residue ring room temperature showed silica gel sodium sodium hydroxide solid solution solvent spectra structure substituent Table washed yellow yield