Quarterly Journal of the Chemical Society of London |
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Page 20
... filtered , and poured into water . The white alkali - soluble solid that separated was filtered off , washed , and dried ; it had m . p . ca. 100 ° ( 1-3 g . , 65 % ) , [ x ] 461 + 67 ° ± 1 ° , [ a ] 2791 + 66 ° ± 1 ° ( c 0.5690 ) . 122 ...
... filtered , and poured into water . The white alkali - soluble solid that separated was filtered off , washed , and dried ; it had m . p . ca. 100 ° ( 1-3 g . , 65 % ) , [ x ] 461 + 67 ° ± 1 ° , [ a ] 2791 + 66 ° ± 1 ° ( c 0.5690 ) . 122 ...
Page 69
... filtered off . The warm mixture of the two solutions deposited white crystals when stirred . The solution was cooled to room temperature and the filtered compound was washed with cold ethanol and dry ether ( yield 0-1 g . ) ( Found : C ...
... filtered off . The warm mixture of the two solutions deposited white crystals when stirred . The solution was cooled to room temperature and the filtered compound was washed with cold ethanol and dry ether ( yield 0-1 g . ) ( Found : C ...
Page 554
... filtered hot . The crystals obtained on cooling were recrystallised from dilute alcohol and had m . p . and mixed m . p . with formaldehyde- dimedone , 187 ° . ( e ) Mild oxidation of gentianine . The alkaloid ( 1.45 g . ) in acetone ...
... filtered hot . The crystals obtained on cooling were recrystallised from dilute alcohol and had m . p . and mixed m . p . with formaldehyde- dimedone , 187 ° . ( e ) Mild oxidation of gentianine . The alkaloid ( 1.45 g . ) in acetone ...
Contents
Dynamic contact angles Part I Changes in airsolutionsolid contact angles with | 22 |
Perfluoroalkyl derivatives of nitrogen Part V The mechanism of the Hofmann | 30 |
Studies on biological methylation Part XVI Natural sulphonium compounds | 39 |
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acetic acid acetic anhydride acetone acetyl added alcohol alkali alkyl Amer ation atom band benzene boiling bond boron trichloride bromide bromine Calc carbon Chem chloroform chromatography colourless complex compound concentration condensation cooled crystallised from ethanol curve decomp derivative dilute dioxan dissolved distilled dried elution equilibrium ester ethanol evaporated EXPERIMENTAL extracted with ether filtered filtrate formed Found fraction gave give H₂O heated hydrochloric acid hydrogen chloride hydrolysis infrared iodide iodine irradiation isolated ketone Light absorption lithium aluminium hydride m. p. and mixed method methyl mixed m. p. mixture mole molecule needles nitrate obtained oxidation oxidised phenyl phosphate picrate potassium hydroxide precipitate prepared pyridine reaction reagent reflux removed requires residue room temperature salt sodium hydroxide solid soluble solvent spectra spectrum structure sulphide sulphuric acid Table tetrahydrofuran trichloride ultraviolet vacuo values washed yellow yield