Journal of the Chemical SocietyThe Society., 1964 "Titles of chemical papers in British and foreign journals" included in Quarterly journal, v. 1-12. |
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Page 52
... quinone A , in both neutral and basic media , indicated that it was almost certainly a derivative of 5,7 - dihydroxy - 1,4 - naphthaquinone.5 In accordance with this view it formed a boroacetate ( peri - OH ) and , although it was ...
... quinone A , in both neutral and basic media , indicated that it was almost certainly a derivative of 5,7 - dihydroxy - 1,4 - naphthaquinone.5 In accordance with this view it formed a boroacetate ( peri - OH ) and , although it was ...
Page 53
... quinone residue and the fact that no nitrogen - containing products are obtained on methylation with diazomethane ... quinone A dimethyl ether were significantly closer to those of 5,7 - dimethoxy - 1,4 - naphtha- quinone 8 than to those ...
... quinone residue and the fact that no nitrogen - containing products are obtained on methylation with diazomethane ... quinone A dimethyl ether were significantly closer to those of 5,7 - dimethoxy - 1,4 - naphtha- quinone 8 than to those ...
Page 1067
... quinone . Reaction of bromine with the hexamethoxybiphenylene was complex , giving this same quinone , its 4 - bromo - derivative , 4 - bromo- 1,2,3,6,7,8 - hexamethoxybiphenylene , and 2,2 ' - dibromo - 3,4,5,3 ' , 4 ' , 5 ' - hexa ...
... quinone . Reaction of bromine with the hexamethoxybiphenylene was complex , giving this same quinone , its 4 - bromo - derivative , 4 - bromo- 1,2,3,6,7,8 - hexamethoxybiphenylene , and 2,2 ' - dibromo - 3,4,5,3 ' , 4 ' , 5 ' - hexa ...
Contents
NO PAGE | 1 |
Nucleophilic reactivity Part IV Competing bimolecular substitution | 5 |
The biosynthesis of fungal metabolites Part I Two different pathways | 16 |
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absorption acetic acid alkaline aluminium chloride Amer amine anhydride aphins aqueous aromatic atoms band benzene bond bromide Calc carbon Chem chloride chloroform chromatography cm.¹ complex compound concentration coupling constants crystallised crystals decomp decomposition derivatives diazomethane dilute dimethyl dimethyl ether dioxan dried Elution equation erythroaphin-fb erythroaphins ester ethanol ether ethyl ethyl acetate evaporated EXPERIMENTAL extracted formation Found fraction gave halides hydrochloric acid hydrogen hydrogen chloride hydrolysis infrared infrared spectra iodide irradiated isomer k₂ ligand light petroleum m. p. and mixed maltose mixed m. p. mixture mole molecule mµ log ɛ nitrogen obtained oxidation oxygen phenyl piperidine potassium precipitate prepared protoaphin proton pyridine quinone reaction recrystallised refluxed requires residue room temperature sample similar sodium hydroxide soluble solution solvent spectrum structure substitution Table ultraviolet values washed yellow yield