Journal of the Chemical Society, Part 3Chemical Society., 1949 |
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Page 1761
... filtration , and the solution was neutralised with silver carbonate . The filtered solution was evaporated to a syrup which was warmed ( 60 ° ) with 0-3N - barium hydroxide ( 50 c.c. ) for 3 hours , to convert esters of the uronic acids ...
... filtration , and the solution was neutralised with silver carbonate . The filtered solution was evaporated to a syrup which was warmed ( 60 ° ) with 0-3N - barium hydroxide ( 50 c.c. ) for 3 hours , to convert esters of the uronic acids ...
Page 1764
... filtered off . The filtrate was boiled under reflux , and the reaction was followed polarimetrically : [ a ] p + 38 ° ( initial value ) ; + 49 ° ( 2 hours ) ; + 61 ° ( 5 hours ) ; + 74 ° ( 9 hours ) ; + 76 ° ( 103 hours ) . The cooled ...
... filtered off . The filtrate was boiled under reflux , and the reaction was followed polarimetrically : [ a ] p + 38 ° ( initial value ) ; + 49 ° ( 2 hours ) ; + 61 ° ( 5 hours ) ; + 74 ° ( 9 hours ) ; + 76 ° ( 103 hours ) . The cooled ...
Page 2127
... filtered , and most of the ethanol distilled from the filtrate . Water was added to the residue , and after the removal of a small amount of oily impurity , it was acidified with hydrochloric acid . The resulting acid was twice ...
... filtered , and most of the ethanol distilled from the filtrate . Water was added to the residue , and after the removal of a small amount of oily impurity , it was acidified with hydrochloric acid . The resulting acid was twice ...
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acetic acid acetic anhydride acetone acetyl added admixture alkaline alkyl aluminium chloride Amer ammonia aqueous solution atoms barium benzene boiling bromine Calc carbinol carbon catalyst Chem Chim chloroform colourless needles compound concentrated condensation cooled crystals cyclohexene decomp derivatives dilute dioxan dissolved distilled dithizone dried equiv ester ethanol ethyl acetate ethyl alcohol ethylene evaporated EXPERIMENTAL filtered filtrate formed Found fraction gave give heated under reflux hydrocarbon hydrochloric acid hydrogen chloride hydrolysis iodide ions isolated ketone Light absorption light petroleum b. p. method methyl mixed m. p. mixture molecule obtained oxide phenyl plates potassium hydroxide precipitated prepared pressure prisms pyridine Q-enzyme R₁ R₂ reaction reagent reduced removed requires residue room temperature salt semicarbazone separated sodium hydroxide solid soluble solvent specimen structure substance sulphate sulphone sulphuric acid synthesis Table unsaturated washed yield