Quarterly Journal of the Chemical Society of London, Volume 21 |
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Page 3525
... Dimer ( IV ) .- A striking property of dimer ( IV ) was its conversion into the photo - isomer ( IX ) when set aside for 4 h in benzene in sunlight . The conversion was complete as judged by u.v. spectroscopy , and the photo - isomer ...
... Dimer ( IV ) .- A striking property of dimer ( IV ) was its conversion into the photo - isomer ( IX ) when set aside for 4 h in benzene in sunlight . The conversion was complete as judged by u.v. spectroscopy , and the photo - isomer ...
Page 3526
... Dimer ( IV ) has been obtained previously by de- hydration of the cyclopentenone ( III ) with acetic acid- sulphur acid 18 but with a higher concentration of sulphuric acid the blue dehydro - dimer ( XIV ) is the major product ( see ...
... Dimer ( IV ) has been obtained previously by de- hydration of the cyclopentenone ( III ) with acetic acid- sulphur acid 18 but with a higher concentration of sulphuric acid the blue dehydro - dimer ( XIV ) is the major product ( see ...
Page 3529
... Dimer ( IV ) with Zinc - Acetic Acid.- The yellow dimer ( 300 mg ) , suspended in glacial acetic acid ( 10 ml ) , was vigorously stirred ( magnetically ) while an excess of zinc dust was added in small portions during 10 min . After the ...
... Dimer ( IV ) with Zinc - Acetic Acid.- The yellow dimer ( 300 mg ) , suspended in glacial acetic acid ( 10 ml ) , was vigorously stirred ( magnetically ) while an excess of zinc dust was added in small portions during 10 min . After the ...
Contents
Organic chemistry | 3513 |
Partially fluorinated heterocyclic compounds Part IX The syntheses of 4567tetrafluorobenzobfuran | 3516 |
Reactions of cyclohexadienes Part XII Some dienamines and dimethyl acetylenedicarboxylate | 3517 |
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acetic acid acetic anhydride acetone alkyl Amer amine aqueous ethanol aromatic atom benzene benzene-light petroleum benzyl boiling boron tribromide bromide Calc carbonyl CH₂ CHCl3 Chem chloroform chromatography cm¯¹ cm¹ CO₂H compound condensation cooled crystallised decomp derivatives diazomethane dimer dimethyl dimethylformamide dioxan dried elution enol ergochrysin ester ethanol ether ethyl acetate EtOH evaporated extracted filtered Found gave give heated hydrogen chloride i.r. spectrum identical isolated isomers ketone log ɛ mass spectra methyl methylene mixed m.p. mixture myricanone n.m.r. spectrum nitrogen Nujol obtained olefinic oxidation petroleum Ph Ph Ph PhCH₂ phenolic potassium prepared prisms protons pyridine quinuclidine reaction refluxed requires residue ring room temperature S)-sulphoxide sclerotiorin signals singlet sodium hydrogen carbonate sodium hydroxide solid solution solvent stirred structure sulphoxide synthesis triethylamine vacuo W. B. Whalley washed yellow needles yield