Journal of the Chemical SocietyThe Society., 1963 |
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Results 1-3 of 77
Page 2942
... acetone - light petroleum ) ( Found : C , 68-9 ; H , 8.5 . C20H30O5 requires C , 68-5 ; H , 8 · 6 % ) . The acidic fraction ( B ) ( 8 g . ) was absorbed on silica gel from acetone and chromatographed on charcoal - Celite ( charcoal 200 ...
... acetone - light petroleum ) ( Found : C , 68-9 ; H , 8.5 . C20H30O5 requires C , 68-5 ; H , 8 · 6 % ) . The acidic fraction ( B ) ( 8 g . ) was absorbed on silica gel from acetone and chromatographed on charcoal - Celite ( charcoal 200 ...
Page 2953
... acetone ( 5 ml . ) was treated with the chromium trioxide reagent ( 0 · 15 ml . ) for 1 hr . The neutral fraction ( 100 mg . ) recrystallised from acetone - light petroleum , giving needles of the keto - lactone ( V ) , m . p . 264-265 ...
... acetone ( 5 ml . ) was treated with the chromium trioxide reagent ( 0 · 15 ml . ) for 1 hr . The neutral fraction ( 100 mg . ) recrystallised from acetone - light petroleum , giving needles of the keto - lactone ( V ) , m . p . 264-265 ...
Page 2969
... acetone ( 20 ml . ) as above . The triacetate of the B- glycoside ( 0.90 g . , 62 % ) had m . p . 121-122 ° ( from ethanol ) , [ a ] 19 + 3.5 ° ( c 0-4 in CHCl3 ) ( Found : C , 48.1 ; H , 4 · 7 ; N , 7 · 8 % ) . 3,4,6 - Tri - O - acetyl ...
... acetone ( 20 ml . ) as above . The triacetate of the B- glycoside ( 0.90 g . , 62 % ) had m . p . 121-122 ° ( from ethanol ) , [ a ] 19 + 3.5 ° ( c 0-4 in CHCl3 ) ( Found : C , 48.1 ; H , 4 · 7 ; N , 7 · 8 % ) . 3,4,6 - Tri - O - acetyl ...
Contents
Organic | 2567 |
Gibberellic acid Part XXIII Some perhydrofluoren8aylacetic acid lactones | 2590 |
Gibberellic acid Part XXV Some new reduction products of gibberellic acid | 2606 |
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Common terms and phrases
absorption acetic acid acetic anhydride acetone acetyl alumina Amer amine anhydride atom band benzene benzoate Calc carboxylate catalyst cation CH₂ Chem chloride chloroform chromatography cm.¹ complex compound concentration constant crystallised decomp decomposition derivative dibromide dilute dimethyl dioxan distilled dried eluted ester ethanol ethyl acetate evaporated experimental extracted with ether filtered filtrate flindissone formation Found fraction gave H₂O heated hydrochloric acid hydrogen bromide hydrogen chloride hydrogen peroxide hydrolysis hydroxide infrared infrared spectrum k₁ ketone kinetic lactone light petroleum liquid lithium aluminium hydride mixed m. p. mixture mole mµ ɛ needles nitrogen obtained optical oxidation oxygen petroleum b. p. phenol potassium prepared prisms proton pteridine pyridine pyrolysis reaction reagent refluxed requires residue resin room temperature salt scission sodium hydrogen carbonate sodium hydroxide solvent spectra structure Table thiolactone toluene-p-sulphonic ultraviolet values vinyl Vmax washed yield