Quarterly Journal of the Chemical Society of London, Volume 21 |
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Page 3781
... olefin ( I ) into an anion absorbing at 335 nm indicated that one of the reactions was the addi- tion of butyl - lithium to the olefinic double bond to form structure ( X ) . structure ( X ) . The formation of an anion absorbing at 450 ...
... olefin ( I ) into an anion absorbing at 335 nm indicated that one of the reactions was the addi- tion of butyl - lithium to the olefinic double bond to form structure ( X ) . structure ( X ) . The formation of an anion absorbing at 450 ...
Page 3782
... olefinic double bond would produce ion ( IX ) ; having exactly the same chromophore as ( X ) , this species should absorb at 335 nm . Protonation with methanol followed by g.l.c. - mass spectrometry revealed the presence of four ...
... olefinic double bond would produce ion ( IX ) ; having exactly the same chromophore as ( X ) , this species should absorb at 335 nm . Protonation with methanol followed by g.l.c. - mass spectrometry revealed the presence of four ...
Page 3810
... olefinic protons remain unchanged . In contrast , with jacareu- bin trimethyl ether and 6 - deoxyjacareubin dimethyl ... Olefinic proton ( H - 4 ) relative intensity 59 * Angular pyranoxanthone ( 10 ) Olefinic proton 56 * 57 * ( H - 1 ) ...
... olefinic protons remain unchanged . In contrast , with jacareu- bin trimethyl ether and 6 - deoxyjacareubin dimethyl ... Olefinic proton ( H - 4 ) relative intensity 59 * Angular pyranoxanthone ( 10 ) Olefinic proton 56 * 57 * ( H - 1 ) ...
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