Quarterly Journal of the Chemical Society of London, Volume 21 |
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Page 3760
... benzyl chloroformate . The N - benzyl- oxycarbonyl derivative ( 5 g ) and L - tyrosine hydrazide ( 1 · 9 g ) were dissolved in boiling methanol ( 30 ml ) . The hot solu- tion was immediately filtered and crystallization began at once ...
... benzyl chloroformate . The N - benzyl- oxycarbonyl derivative ( 5 g ) and L - tyrosine hydrazide ( 1 · 9 g ) were dissolved in boiling methanol ( 30 ml ) . The hot solu- tion was immediately filtered and crystallization began at once ...
Page 3761
... Benzyl N - t - Butoxycarbonyldiazoacetyl - D- piperidine - 2 - carboxylate ( 10 ) .- The diazo - derivative ( 10 ) was photolysed in the manner already described for 1 h . The i.r. spectrum of the crude mixture indicated the presence of ...
... Benzyl N - t - Butoxycarbonyldiazoacetyl - D- piperidine - 2 - carboxylate ( 10 ) .- The diazo - derivative ( 10 ) was photolysed in the manner already described for 1 h . The i.r. spectrum of the crude mixture indicated the presence of ...
Page 3767
... benzyl hydrogen oxalates was irradiated similarly , benzyl n - butyl oxalate ( 30 % ) was obtained in addition to the symmetrical diesters . Neither the alcohol [ system ( 1 ) ] ( which could have been produced from the alkyl hydrogen ...
... benzyl hydrogen oxalates was irradiated similarly , benzyl n - butyl oxalate ( 30 % ) was obtained in addition to the symmetrical diesters . Neither the alcohol [ system ( 1 ) ] ( which could have been produced from the alkyl hydrogen ...
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