Journal of the Chemical Society, Part 3Chemical Society., 1949 |
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Page 1706
... method of isolation by which Q - enzyme preparations substantially free from the other enzymes of this group are obtained as free - flowing powders . A preliminary account of this method was given by Peat , Bourne , and Barker in 1948 ...
... method of isolation by which Q - enzyme preparations substantially free from the other enzymes of this group are obtained as free - flowing powders . A preliminary account of this method was given by Peat , Bourne , and Barker in 1948 ...
Page 1879
... method , whereby arabinal ( prepared from arabinose by the usual standard reactions ) was treated with ice - cold N - sulphuric acid . This was essentially the method of preparation employed by the early investigators of the sugar ...
... method , whereby arabinal ( prepared from arabinose by the usual standard reactions ) was treated with ice - cold N - sulphuric acid . This was essentially the method of preparation employed by the early investigators of the sugar ...
Page 2037
... method ( a ) . 20 B - o - Chlorophenoxypropionic Acid . - Reaction of o - chlorophenol ( 64 g . ) , b . p . 92 ° / 55 mm . , n 1.5580 , with ethyl acrylate ( 50 g . ) by method ( b ) gave ethyl B - o - chlorophenoxypropionate ( 12 g ...
... method ( a ) . 20 B - o - Chlorophenoxypropionic Acid . - Reaction of o - chlorophenol ( 64 g . ) , b . p . 92 ° / 55 mm . , n 1.5580 , with ethyl acrylate ( 50 g . ) by method ( b ) gave ethyl B - o - chlorophenoxypropionate ( 12 g ...
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Common terms and phrases
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