Quarterly Journal of the Chemical Society of London |
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Page 2669
... isolated only two diastereoisomeric forms . These diastereoisomers , which were obtained in unequal amounts , on oxidation separately gave enantiomeric ( + ) - and ( - ) - dibromo - ketones ( VI ) . CHR.CH CHR'.OH ( I , IV , VII ) ( I ...
... isolated only two diastereoisomeric forms . These diastereoisomers , which were obtained in unequal amounts , on oxidation separately gave enantiomeric ( + ) - and ( - ) - dibromo - ketones ( VI ) . CHR.CH CHR'.OH ( I , IV , VII ) ( I ...
Page 2871
... isolated by ethereal extraction , was crystallised from chloroform - methanol giving large needles , m . p . 248-249 ° . Further re- crystallisation gave 18 ( a ) -oleanane - 2 " ẞ " -19 ( a ) -diol ( 608 mg . ) , m . p . 249-249-5 ...
... isolated by ethereal extraction , was crystallised from chloroform - methanol giving large needles , m . p . 248-249 ° . Further re- crystallisation gave 18 ( a ) -oleanane - 2 " ẞ " -19 ( a ) -diol ( 608 mg . ) , m . p . 249-249-5 ...
Page 3004
... isolated herculin a highly unstable unsaturated secondary amide ( infra - red spectrum , Fig . 1 ) , m . p . 63-65 ° , was isolated . It was markedly different from the stereoisomeric N - isobutylundeca - 1 : 7 - diene - 1 - carboxy ...
... isolated herculin a highly unstable unsaturated secondary amide ( infra - red spectrum , Fig . 1 ) , m . p . 63-65 ° , was isolated . It was markedly different from the stereoisomeric N - isobutylundeca - 1 : 7 - diene - 1 - carboxy ...
Contents
ONE HUNDRED AND ELEVENTH ANNUAL GENERAL MEETING | 2449 |
483 | 2465 |
Mechanism of Substitution at a Saturated Carbon Atom Part XXXIII Kinetic | 2488 |
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acetic acid acetone acetyl acetyl chloride added alcohol alum aluminium aluminium bromide Amer ammonia anhydride aqueous atom benzene benzyl boiling Calc carbon Chem Chemical Chemistry chloroform chromatography colourless compound concentrated condensation cooled crystallised crystals decomp derivative dilute dissolved distilled dried ester ethanol ether ethyl acetate ethylene evaporated excess extracted filtered filtrate formed Found fraction gave give heated hydrate hydrochloric acid hydrogen bromide hydrogen chloride hydrolysis iodide isolated ketone L-iditol Lecture light petroleum b. p. lignin lithium aluminium hydride m. p. and mixed material method methyl mixed m. p. mixture molecular molecules needles nitrate obtained oxide phase phosphate polymer potassium hydroxide precipitated prepared present Professor pyridine reaction reflux requires residue retinene room temperature salt sample separated sodium hydroxide solid solution solvent stirred structure Table trifluoroiodomethane vapour pressure vitamin washed yellow yield