Journal of the Chemical SocietyThe Society., 1964 "Titles of chemical papers in British and foreign journals" included in Quarterly journal, v. 1-12. |
From inside the book
Results 1-3 of 71
Page 52
... hydroxyl in a 1,4 - naphthaquinone system , its more acidic hydroxyl group had pK 6-5 , similar to that in 5,7 - dihydroxy - 1,4 - naphthaquinone ( pK , 6 · 2 ) . More- over , it showed two infrared bands [ max . 1655 ( infl . ) and ...
... hydroxyl in a 1,4 - naphthaquinone system , its more acidic hydroxyl group had pK 6-5 , similar to that in 5,7 - dihydroxy - 1,4 - naphthaquinone ( pK , 6 · 2 ) . More- over , it showed two infrared bands [ max . 1655 ( infl . ) and ...
Page 82
... hydroxyl stretching region near 3300 cm . - 1 characteristic of free hydroxyl groups , whereas in the erythroaphins there is only a weak band near 2700 cm . - 1 corresponding to strongly chelated hydroxyl groups . That this difference ...
... hydroxyl stretching region near 3300 cm . - 1 characteristic of free hydroxyl groups , whereas in the erythroaphins there is only a weak band near 2700 cm . - 1 corresponding to strongly chelated hydroxyl groups . That this difference ...
Page 102
... hydroxyl substituent at position 12 and the methyl group at 11 have pseudo - equatorial configurations . The long - range coupling constant J9,12 of ca. 1.5 c./sec . suggests that it is of the Je'a ' type ( see above ) and hence that ...
... hydroxyl substituent at position 12 and the methyl group at 11 have pseudo - equatorial configurations . The long - range coupling constant J9,12 of ca. 1.5 c./sec . suggests that it is of the Je'a ' type ( see above ) and hence that ...
Contents
By J K P ARIYARATNE and M L H GREEN | 1 |
The biosynthesis of fungal metabolites | 16 |
Monofluoroisoquinolines | 22 |
105 other sections not shown
Other editions - View all
Common terms and phrases
absorption acetic acid acetic anhydride 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 dioxan dried Elution equation erythroaphin-fb erythroaphins ester ethanol ether ethyl ethyl acetate evaporated EXPERIMENTAL extracted formation formed Found fraction gave halides hydrochloric acid hydrogen hydrolysis infrared infrared spectra iodide irradiated isomer ligand light petroleum m. p. and mixed maltose mixed m. p. mixture mole molecule mµ log ɛ nitrogen nuclear magnetic resonance obtained oxidation oxygen phenyl piperidine potassium prepared protoaphin protoaphin-fb proton pyridine quinone reaction recrystallised refluxed requires residue ring room temperature sample similar sodium hydroxide solution solvent spectrum structure substituted Table ultraviolet values washed yellow yield