Quarterly Journal of the Chemical Society of London, Part 4, Pages 3513-4668 |
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Page 3703
... ester ) at 270 mp ( see Figure ) . ( b ) The condensation of the p - nitrophenyl ester with glycine ethyl ester hydrochloride in the presence of excess of 1 - methylpiperidine was interrupted ; fractional crystallisation gave peptide ...
... ester ) at 270 mp ( see Figure ) . ( b ) The condensation of the p - nitrophenyl ester with glycine ethyl ester hydrochloride in the presence of excess of 1 - methylpiperidine was interrupted ; fractional crystallisation gave peptide ...
Page 3704
... ester ) but if the rate of oxazolone formation by the action of glycine ethyl ester is no greater than that caused by dimethylglycine methyl ester ( a base of comparable strength in chloroform ) then no detectable racemisation would be ...
... ester ) but if the rate of oxazolone formation by the action of glycine ethyl ester is no greater than that caused by dimethylglycine methyl ester ( a base of comparable strength in chloroform ) then no detectable racemisation would be ...
Page 3708
... Ester .- ( a ) L - Proline p - nitrophenyl ester hydro- bromide 18 ( 0.63 g . ) was suspended in ethyl acetate ( 10 ml . ) containing p - nitrobenzoyl chloride ( 0.372 g . ) , and sodium carbonate ( 1 · 06 g . ) in water ( 6 ml . ) was ...
... Ester .- ( a ) L - Proline p - nitrophenyl ester hydro- bromide 18 ( 0.63 g . ) was suspended in ethyl acetate ( 10 ml . ) containing p - nitrobenzoyl chloride ( 0.372 g . ) , and sodium carbonate ( 1 · 06 g . ) in water ( 6 ml . ) was ...
Contents
NO PAGE | 3528 |
The adsorption of stearic acid from solution by oxide adsorbents | 3535 |
The effect of pressure of the electrical conductivity of aqueous mixed electrolyte | 3548 |
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absorption acetic acid acetic anhydride acetone acetyl added alcohol alkaline aluminium Amer amine atoms band benzene benzyl boiling bond bromide Calc carbon cations CH₂ chabazite Chem chloride chloroform chromatography cm.¹ colistin compounds concentration constant crystallised crystals decomp derivatives dilute dimethyl dimethylformamide dioxan dissolved distilled dried ester ethanol ether ethyl acetate evaporated extracted filtrate formation formed Found fraction gave give heated hydrochloric acid hydrochloride hydrogen hydrolysis iodide isomer ketone lithium lithium aluminium hydride m. p. and mixed mixed m. p. mixture mole molecules needles nitrate nitric acid nitrogen o-xylene obtained optical oxide oxygen phenyl phosphine picrate polymyxin potassium precipitate prepared prisms proton pyridine reaction recrystallised reduced refluxed requires residue resonance room temperature salt sodium hydroxide solution solvent spectra stirred structure substitution sulphone sulphuric acid Table tetrahydrofuran values washed yellow yield