Quarterly Journal of the Chemical Society of London, Volume 21 |
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Page 3675
... ester is triclinic and crystallographically awkward , but the octamethyl ester is monoclinic and unambiguously centrosymmetric ( cf. IVa ; R = Me ) , whereas structures ( VI ) and ( VII ) have no centre of symmetry . - The photochemical ...
... ester is triclinic and crystallographically awkward , but the octamethyl ester is monoclinic and unambiguously centrosymmetric ( cf. IVa ; R = Me ) , whereas structures ( VI ) and ( VII ) have no centre of symmetry . - The photochemical ...
Page 3676
... ester ( IVa , IVb ; R = Me ) did not react with methanol , but was converted by cold methanolic sodium methoxide into a methoxyoctamethyl ester , m.p. 193 ° ( XVI ) . This was in contrast to the behaviour CO2R ICQR } = C - CH = C CO2H ...
... ester ( IVa , IVb ; R = Me ) did not react with methanol , but was converted by cold methanolic sodium methoxide into a methoxyoctamethyl ester , m.p. 193 ° ( XVI ) . This was in contrast to the behaviour CO2R ICQR } = C - CH = C CO2H ...
Page 3677
... ester , C2H6O13 , m.p. 71 ° .✓.2 The tetramethylester - diacid , m.p. 245 , was stable to OMe The symmetrical structures ( XXIIb ; R = H ) for the tetramethyl ester - diacid , and ( XXIIb ; R = Me ) for the hexamethyl ester , follow ...
... ester , C2H6O13 , m.p. 71 ° .✓.2 The tetramethylester - diacid , m.p. 245 , was stable to OMe The symmetrical structures ( XXIIb ; R = H ) for the tetramethyl ester - diacid , and ( XXIIb ; R = Me ) for the hexamethyl ester , follow ...
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