Journal of the Chemical SocietyThe Society., 1949 |
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Results 1-3 of 55
Page 1105
... lactone ( XII ) , also obtained as follows . The bromo - lactone ( 0.5 g . ) was heated under reflux for 40 minutes with glacial acetic acid ( 5 c.c. ) and hydrobromic acid ( 34 % ; 5 c.c. ) , and the mixture poured into water ( 40 c.c. ) ...
... lactone ( XII ) , also obtained as follows . The bromo - lactone ( 0.5 g . ) was heated under reflux for 40 minutes with glacial acetic acid ( 5 c.c. ) and hydrobromic acid ( 34 % ; 5 c.c. ) , and the mixture poured into water ( 40 c.c. ) ...
Page 1429
... lactone ( 510 mg . ) which after recrystallis- ation from cyclohexene formed prisms , m . p . 69 ° ( Found : C , 59-2 ; H , 7 · 0 . C , H10O requires C , 59.15 ; H , 7.1 % ) . Acidification of the aqueous layer , after the ether ...
... lactone ( 510 mg . ) which after recrystallis- ation from cyclohexene formed prisms , m . p . 69 ° ( Found : C , 59-2 ; H , 7 · 0 . C , H10O requires C , 59.15 ; H , 7.1 % ) . Acidification of the aqueous layer , after the ether ...
Page 1606
... Lactone Formation . - The free sugar ( c ) was converted into the lactone as usual and distilled . The distillate partly crystallised ( 69 % ) . Investigation of the Crystalline Lactone Fraction . This was shown to consist of 3 - methyl ...
... Lactone Formation . - The free sugar ( c ) was converted into the lactone as usual and distilled . The distillate partly crystallised ( 69 % ) . Investigation of the Crystalline Lactone Fraction . This was shown to consist of 3 - methyl ...
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Common terms and phrases
4-dinitrophenylhydrazone absorption acetic anhydride acetone acetyl acidified added aldehyde alkaline aluminium chloride Amer amine ammonia aniline aqueous sodium atom benzene boiling bromine Calc carbon catalyst CH₂ Chem chloroform citrinin colourless needles compound condensation containing cooled crystallised crystallised from alcohol crystals cyanide cyclisation decomp derivative dilute dissolved distilled dried electrode ester evaporated extracted with ether filtered filtrate formed colourless Found fraction gave give heated under reflux hydrochloric acid hydrogen chloride hydrolysis iodide isolated ketone lactone light petroleum b. p. m. p. and mixed methanol method methyl alcohol minutes mixed m. p. mixture molecule obtained oxide phenol phosphoric picrate potassium hydroxide precipitate prepared pyridine reaction reduced pressure requires residue resin room temperature salt separated sodium hydroxide solid soluble solution solvent specimen structure substance sulphuric acid triethylamine values washed yellow needles yield