Quarterly Journal of the Chemical Society of London, Volume 21 |
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Results 1-3 of 91
Page 3633
... solid ( 210 g ) , m.p. 140-141 ° , was filtered off and boiled for 1 h with ethanol ( 600 ml ) . After cooling , the solid ( 177 g ) , m.p. 152 ° , was filtered off . Recrystallis- ation from ethanol ( 3.7 1 ) gave pale yellow needles ...
... solid ( 210 g ) , m.p. 140-141 ° , was filtered off and boiled for 1 h with ethanol ( 600 ml ) . After cooling , the solid ( 177 g ) , m.p. 152 ° , was filtered off . Recrystallis- ation from ethanol ( 3.7 1 ) gave pale yellow needles ...
Page 3801
... solid appeared . The extract was evaporated under reduced pressure to yield a light brown solid ( 110 g ) . ( a ) Isolation of the biflavanones from G. buchananii Baker . The solid from the foregoing extract was tri- turated with ...
... solid appeared . The extract was evaporated under reduced pressure to yield a light brown solid ( 110 g ) . ( a ) Isolation of the biflavanones from G. buchananii Baker . The solid from the foregoing extract was tri- turated with ...
Page 3872
... solid , m.p. 184-185 ° ( decomp . ) , within a few minutes and was collected after stirring for 1 h . The perbromide was washed well with chloroform and stored in vacuo at room temperature ( Found : C , 33-5 ; H , 19 ; Br , 55-1 ; N , 3 ...
... solid , m.p. 184-185 ° ( decomp . ) , within a few minutes and was collected after stirring for 1 h . The perbromide was washed well with chloroform and stored in vacuo at room temperature ( Found : C , 33-5 ; H , 19 ; Br , 55-1 ; N , 3 ...
Contents
Organic chemistry | 3513 |
Partially fluorinated heterocyclic compounds Part IX The syntheses of 4567tetrafluorobenzobfuran | 3516 |
Reactions of cyclohexadienes Part XII Some dienamines and dimethyl acetylenedicarboxylate | 3517 |
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acetic acid acetic anhydride acetone alkyl Amer amine aqueous ethanol aromatic atom benzene benzene-light petroleum benzyl boiling boron tribromide bromide Calc carbonyl CH₂ CHCl3 Chem chloroform chromatography cm¯¹ cm¹ CO₂H compound condensation cooled crystallised decomp derivatives diazomethane dimer dimethyl dimethylformamide dioxan dried elution enol ergochrysin ester ethanol ether ethyl acetate EtOH evaporated extracted filtered Found gave give heated hydrogen chloride i.r. spectrum identical isolated isomers ketone log ɛ mass spectra methyl methylene mixed m.p. mixture myricanone n.m.r. spectrum nitrogen Nujol obtained olefinic oxidation petroleum Ph Ph Ph PhCH₂ phenolic potassium prepared prisms protons pyridine quinuclidine reaction refluxed requires residue ring room temperature S)-sulphoxide sclerotiorin signals singlet sodium hydrogen carbonate sodium hydroxide solid solution solvent stirred structure sulphoxide synthesis triethylamine vacuo W. B. Whalley washed yellow needles yield