British Abstracts: Pure chemistry and physiology. ser. A1943 |
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Trang 57
... acetate in boiling AcOH gives keto - d - fructose penta- acetate ( Hudson et al . , A. , 1916 , i , 116 ) , thus proving the nature of the reaction . 1 - Diazo - 1 - deoxyketo - d - glucoheptulose penta - acetate gives similarly keto ...
... acetate in boiling AcOH gives keto - d - fructose penta- acetate ( Hudson et al . , A. , 1916 , i , 116 ) , thus proving the nature of the reaction . 1 - Diazo - 1 - deoxyketo - d - glucoheptulose penta - acetate gives similarly keto ...
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... acetate ( 1 ) ( cf. loc . cit . ) . With boiling 0.5 % HCl - MeOH , ( I ) gives 2 - acetamido - a - methylaltroside 3 - acetate ( 60 % ) , m.p. 189 ° ( decomp . ) , [ a ] 16 + 7.3 ° in MeOH , and with boiling Ac2O - NaOAc gives the ...
... acetate ( 1 ) ( cf. loc . cit . ) . With boiling 0.5 % HCl - MeOH , ( I ) gives 2 - acetamido - a - methylaltroside 3 - acetate ( 60 % ) , m.p. 189 ° ( decomp . ) , [ a ] 16 + 7.3 ° in MeOH , and with boiling Ac2O - NaOAc gives the ...
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... ( acetate , m.p. 91-92 ° ) , of 5 - hydroxy- : 7 - dimethylcoumarin - 3 - acetic acid , m.p. 270 ° ( acetate , m.p. 183- 34 ° ) . Pyrogallol yields ( conc . H2SO1 , H2O - cooling ) 7 : 8 - dihydroxy- methylcoumarin - 3 - acetic acid ...
... ( acetate , m.p. 91-92 ° ) , of 5 - hydroxy- : 7 - dimethylcoumarin - 3 - acetic acid , m.p. 270 ° ( acetate , m.p. 183- 34 ° ) . Pyrogallol yields ( conc . H2SO1 , H2O - cooling ) 7 : 8 - dihydroxy- methylcoumarin - 3 - acetic acid ...
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absorption absorption spectra Acad acetate acid AcOH activity adsorption alkali Amer Anal analysis ation atoms boiling calc catalyst cellulose CHCI Chem chemical chloride CHPh CO₂ CO₂H coeff colour compounds Compt conc concn const containing converted corr cryst crystals curves decomp decreases derivatives described determined diazotised dioxan discussed effect electrolytes electron energy equilibrium ester ether EtOH formation formed Geol gives H₂ H₂O H₂SO heat hydrochloride hydrogen hydrolysed increases ionisation ions isomerised ketone lattice liquid measurements MeOH metal method methyl minerals mixtures NaOH obtained oxidation oxidised oxime particles phenols PhOH Physical Rev picrate polarisation polymerisation pptd pptn prep presence pressure reaction reagent reduced rend room temp salts semicarbazone solubility solution solvent spectra spectrum structure substances surface theory thermal titration vals vapour X-ray yield