Journal of the Chemical SocietyThe Society., 1963 |
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Page 1462
... ester was confirmed by its conversion , through the 3,4 - dimethoxyphenethylamide ( Vb ) , into ( ± ) -O ... ester . The latter was not identical with either of the esters ( Va ) and ( VIa ) , and therefore stereochemical inversion at C ...
... ester was confirmed by its conversion , through the 3,4 - dimethoxyphenethylamide ( Vb ) , into ( ± ) -O ... ester . The latter was not identical with either of the esters ( Va ) and ( VIa ) , and therefore stereochemical inversion at C ...
Page 1467
... esters were obtained , in order of elution : ( 1 ) the lower - melting ester ( VIII ) ( 0.59 g . , m . p . 87—89 ° ) ; ( 2 ) the higher - melting ester ( VIII ) ( 2 · 7 g . , m . p . 114-117 ° ) ; ( 3 ) the ester ( III ) ( 3-8 g . , m ...
... esters were obtained , in order of elution : ( 1 ) the lower - melting ester ( VIII ) ( 0.59 g . , m . p . 87—89 ° ) ; ( 2 ) the higher - melting ester ( VIII ) ( 2 · 7 g . , m . p . 114-117 ° ) ; ( 3 ) the ester ( III ) ( 3-8 g . , m ...
Page 2388
... ester which was alkylated in situ with methyl iodide . Prolonged refluxing with acetic - hydro- chloric acid , hydrolysis , decarboxylation , and removal of the ketal group of the alkylated ester ( V ) proceeded in one step , to furnish ...
... ester which was alkylated in situ with methyl iodide . Prolonged refluxing with acetic - hydro- chloric acid , hydrolysis , decarboxylation , and removal of the ketal group of the alkylated ester ( V ) proceeded in one step , to furnish ...
Contents
263 | 1371 |
Glucosides and aglycones from canary scrophulariaceae Part VI Structure | 1401 |
299 | 1403 |
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absorption acetic acid acetone added alcohol alkaline alumina Amax Amer anhydride aqueous arabinose atomic orbitals bands benzene benzyl bond bromide Calc carbon tetrachloride carbonyl CH₂ Chem chloride chloroform chromatography cm.¹ complex compounds concentrated cooled crystallised decomp derivative dilute distilled dried eluted ester ethanol ether ethyl acetate evaporated experimental extracted filtered fluorine Found fraction galactose gave ginkgetin give glycosides heated hydride hydrochloric hydrogen hydrolysis infrared spectrum iodide isolated isomer ketone light petroleum b. p. lithium aluminium hydride m. p. and mixed magnetic methyl glycosides mixed m. p. mixture mole molecular molecule needles nitrogen obtained oxidation perchlorate peroxide phenol polymers polysaccharide potassium precipitate prepared protons pyridine reaction reduced refluxed requires residue room temperature saturated sodium hydroxide solution solvent solvolysis spectra structure sugars sulphuric Table triethyl phosphite values yellow yield