Quarterly Journal of the Chemical Society of London |
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Page 3497
... ester ( XII ) by ethanolysis with sodium ethoxide were not very successful . In ethanol solution , catalytic amounts of base evidently gave an equilibrium mixture con- taining only about 20 % of the required diethyl ester , while ...
... ester ( XII ) by ethanolysis with sodium ethoxide were not very successful . In ethanol solution , catalytic amounts of base evidently gave an equilibrium mixture con- taining only about 20 % of the required diethyl ester , while ...
Page 3727
... ester , m . p . 133-135 ° . Crystallisation from light petroleum ( b . p . 75—120 ° ) raised the m . p . to 136-137 ° ( Found : C , 65 · 4 ; H , 5.9 . C15H16O3S requires C , 65.2 ; H , 5 · 8 % ) . Iodolactonisation of this ester ( 0.25 ...
... ester , m . p . 133-135 ° . Crystallisation from light petroleum ( b . p . 75—120 ° ) raised the m . p . to 136-137 ° ( Found : C , 65 · 4 ; H , 5.9 . C15H16O3S requires C , 65.2 ; H , 5 · 8 % ) . Iodolactonisation of this ester ( 0.25 ...
Page 4014
... ( ester CO ) , 1695 ( acid CO ) , 1645 ( conj . C = C ) , and 1152 cm. ̄1 ( C - O - C ester ) ( Found : C , 72 · 7 ; H , 9 · 5 ; O , 17-3 . C21H32O , requires C , 72-4 ; H , 9.3 ; O , 18.4 % ) . Ether ( 200 ml . ) eluted unchanged ...
... ( ester CO ) , 1695 ( acid CO ) , 1645 ( conj . C = C ) , and 1152 cm. ̄1 ( C - O - C ester ) ( Found : C , 72 · 7 ; H , 9 · 5 ; O , 17-3 . C21H32O , requires C , 72-4 ; H , 9.3 ; O , 18.4 % ) . Ether ( 200 ml . ) eluted unchanged ...
Contents
3820 | 3468 |
The reactions of carbenes and diazoalkanes with ketones Part I The reaction | 3480 |
The SN mechanism in aromatic compounds Part XXVIII Reactivity in | 3486 |
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absorption acetic acid acetone acetonitrile acidified alcohol alumina Amax Amer anhydrous anthracene aqueous atom band benzene bond Calc carbon catalyst CH₂ Chem chloride chloroform chromatography cm.¹ Found CO₂H complex compounds concentration crystal crystallised cucurbitacin decomp decomposition derivatives diazomethane diethyl dilute dissolved distilled dried Elution enol ester ethanol ethyl acetate evaporated experimental extracted with ether filtered formation fraction gave give H₂O heated hydrochloride hydrogen chloride hydrolysis infrared infrared spectrum isolated isomer kcal./mole ketone kinetic light petroleum lithium aluminium hydride methyl methylene mixed m. p. mixture mole molecular molecule mµ ɛ needles nitrogen nitrosonium nitrosyl chloride obtained oxidation phosphate Phys potassium prepared proton pyridine ratio reaction reduced refluxed requires residue room temperature salt sodium hydrogen sodium hydroxide solid solution solvent spectra stirred structure substitution sulphide sulphuric Table tetracene tube vacuo values Vmax washed yield