Quarterly Journal of the Chemical Society of London, Volume 21 |
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Page 3552
... occurred to give compounds ( 10 ) ( 81 % ) and ( 9 ) ( 19 % ) . Thus , under basic conditions the condensations occurred predominantly to give the undesired heterocyclic nucleus ; hydrolysis of the N- ethoxycarbonyl group occurred ...
... occurred to give compounds ( 10 ) ( 81 % ) and ( 9 ) ( 19 % ) . Thus , under basic conditions the condensations occurred predominantly to give the undesired heterocyclic nucleus ; hydrolysis of the N- ethoxycarbonyl group occurred ...
Page 3554
... occurred predc undesired heterocyclic nucleus ; ethoxycarbonyl group occurred the ester ( 11 ) and was not obs This difference was exploited ( 11 ) and ( 9 ) . The prepond [ 3,2 - b ] isomers ( 8 ) and ( 11 ) conditions is indicative of ...
... occurred predc undesired heterocyclic nucleus ; ethoxycarbonyl group occurred the ester ( 11 ) and was not obs This difference was exploited ( 11 ) and ( 9 ) . The prepond [ 3,2 - b ] isomers ( 8 ) and ( 11 ) conditions is indicative of ...
Page 3787
... occurrence of the pyran derivatives ( 11 ) and ( 12 ) prompted the partial synthesis of compound ( 12 ) from ... occur [ Scheme 3 , route ( a ) ] . Alternatively [ Scheme 3 , route ( b ) ] the benzophenone precursors of xanthones may be ...
... occurrence of the pyran derivatives ( 11 ) and ( 12 ) prompted the partial synthesis of compound ( 12 ) from ... occur [ Scheme 3 , route ( a ) ] . Alternatively [ Scheme 3 , route ( b ) ] the benzophenone precursors of xanthones may be ...
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