British Abstracts: Pure chemistry and physiology. ser. A1943 |
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Trang 155
... conc . HCl in cold COMe2 , ( A ) give 2 - amino - 4 6 - benzylidene - a - methylaltroside hydrochloride , m.p. 96 ° , [ a ] + 85.5 ° in CHCl3 . 4 : 6 - Benzylidene - 2 : 3 - anhydro - a- methylmannoside and conc . aq . NH , at 100 ...
... conc . HCl in cold COMe2 , ( A ) give 2 - amino - 4 6 - benzylidene - a - methylaltroside hydrochloride , m.p. 96 ° , [ a ] + 85.5 ° in CHCl3 . 4 : 6 - Benzylidene - 2 : 3 - anhydro - a- methylmannoside and conc . aq . NH , at 100 ...
Trang 195
... conc . NH , in a sealed tube at 115 ° into a compound , m.p. 165 ° , which could not be obtained quite pure but is very probably caronic acid . Conc . HCl converts ( I ) or ( III ) into a compound , m.p. 265 ° , probably CMe CCI ( CN ) ...
... conc . NH , in a sealed tube at 115 ° into a compound , m.p. 165 ° , which could not be obtained quite pure but is very probably caronic acid . Conc . HCl converts ( I ) or ( III ) into a compound , m.p. 265 ° , probably CMe CCI ( CN ) ...
Trang 241
... ( conc . H2SO ) ( Et ester , m.p. 101 ° ) . m - Cresol yields ( conc . H , SO ) Et 4 : 7 - dimethyl- coumarin - 3 - acetate , m.p. 106 ° ( free acid , m.p. 193-194 ° ) . 2 Vil . With CO2Et CHAc · CH2 • CO2Et , Me ß - resorcylate yields ...
... ( conc . H2SO ) ( Et ester , m.p. 101 ° ) . m - Cresol yields ( conc . H , SO ) Et 4 : 7 - dimethyl- coumarin - 3 - acetate , m.p. 106 ° ( free acid , m.p. 193-194 ° ) . 2 Vil . With CO2Et CHAc · CH2 • CO2Et , Me ß - resorcylate yields ...
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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