Quarterly Journal of the Chemical Society of London |
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Page 3472
... ester and coproporphyrin II tetramethyl ester there are two meso - protons ( B , 8 ) between ẞ - alkyl substituents and correspondingly peaks of intensity two at -1 · 02 and -1.06 respectively ; and in mesoporphyrin IX dimethyl ester ...
... ester and coproporphyrin II tetramethyl ester there are two meso - protons ( B , 8 ) between ẞ - alkyl substituents and correspondingly peaks of intensity two at -1 · 02 and -1.06 respectively ; and in mesoporphyrin IX dimethyl ester ...
Page 4048
... ester and hence to prevent azomethine formation.1 TABLE 2 . Maximal [ ] , at 18-25 ° . Acetylacetone L - Tyrosine Et ester ( c 3.25 ) ( c 3.25 , ethanol + 2 equiv . of dione ) -266 ° -140 -195 ° Phenylalanine Et ester ( c 3.0 ) L - 271 ...
... ester and hence to prevent azomethine formation.1 TABLE 2 . Maximal [ ] , at 18-25 ° . Acetylacetone L - Tyrosine Et ester ( c 3.25 ) ( c 3.25 , ethanol + 2 equiv . of dione ) -266 ° -140 -195 ° Phenylalanine Et ester ( c 3.0 ) L - 271 ...
Page 4212
... ester grouping . The cyclohexenone ( VIII ) was finally hydrogenated over palladium - charcoal to give the ethyl ester ( IX ; R = Et ) . In the second method 2 - methylcyclohexanone was used as starting material . It was converted by ...
... ester grouping . The cyclohexenone ( VIII ) was finally hydrogenated over palladium - charcoal to give the ethyl ester ( IX ; R = Et ) . In the second method 2 - methylcyclohexanone was used as starting material . It was converted by ...
Contents
3082 | 2595 |
Interaction between selenium oxychloride and the trichlorides of boron | 2600 |
NO PAGE | 2601 |
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absorption acetic acid acetic anhydride acetone acetyl added alcohol alkali alumina Amer aqueous ation atom band benzene beryllium boiling bond bromide Calc carbon tetrachloride carbonyl Chem chloride chloroform chromatography cm.¹ colourless complexes compound concentrated cooled crystallised crystals cyclohexanone decomp decomposition derivative diethyl dilute dioxan dissolved distilled elution ester ethanol ethyl acetate evaporated EXPERIMENTAL extracted with ether filtered filtrate formation Found fraction gave heated hydride hydrochloric acid hydrolysis infrared infrared spectrum iodide isolated isomers isorotenolone ketone light petroleum b. p. lithium aluminium hydride m. p. and mixed methyl mixed m. p. mixture mole molecule needles nitrate nitric oxide nitrogen obtained peroxide phenyl phosphate potassium precipitate prepared pyridine quinazoline radicals reaction refluxed requires residue room temperature rotenone sample sodium hydroxide solid solution solvent spectra structure sulphate sulphuric acid Table ultraviolet values yellow yield