Journal of the Chemical SocietyThe Society., 1963 |
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Results 1-3 of 71
Page 1368
... concentrated hydro- chloric acid ( 15 c.c. ) ; the mixture was left at room temperature for 30 min . , then heated to the b . p . during 30 min . , next cooled and diluted with water ; the solid product ( 3 · 1 g . , 58 % ) crystal ...
... concentrated hydro- chloric acid ( 15 c.c. ) ; the mixture was left at room temperature for 30 min . , then heated to the b . p . during 30 min . , next cooled and diluted with water ; the solid product ( 3 · 1 g . , 58 % ) crystal ...
Page 1468
... concentrated aqueous ammonia . The corresponding anhydro - base crystallised slowly , and after 16 hr . the crystals ( 0.45 g . ) , m . p . 157-158 ° , were collected . A solution in hot alcohol ( 25 ml . ) was filtered from sediment ...
... concentrated aqueous ammonia . The corresponding anhydro - base crystallised slowly , and after 16 hr . the crystals ( 0.45 g . ) , m . p . 157-158 ° , were collected . A solution in hot alcohol ( 25 ml . ) was filtered from sediment ...
Page 1829
... concentrated to 100 ml . , and extracted repeatedly with ether until only a weak Seliwanoff test was given by the ether phase ( 12 × 100 ml . ) . The combined ether extracts were concentrated , dried ( Na2SO ) , concentrated further to ...
... concentrated to 100 ml . , and extracted repeatedly with ether until only a weak Seliwanoff test was given by the ether phase ( 12 × 100 ml . ) . The combined ether extracts were concentrated , dried ( Na2SO ) , concentrated further to ...
Contents
263 | 1371 |
Glucosides and aglycones from canary scrophulariaceae Part VI Structure | 1401 |
299 | 1403 |
134 other sections not shown
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Common terms and phrases
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