Quarterly Journal of the Chemical Society of London, Volume 11 |
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Page 2097
... crystals ( 9.7 g . , 64 % ) , m.p. 263-266 ° ( decomp . ) ( from dimethylformamide ) , of 7H - thiazolo [ 3,2 - a ] pyrimidin- 7 - one . 1 filtrate was evaporated to dryness in vacuo . The residue was crystallised from ethanol - light ...
... crystals ( 9.7 g . , 64 % ) , m.p. 263-266 ° ( decomp . ) ( from dimethylformamide ) , of 7H - thiazolo [ 3,2 - a ] pyrimidin- 7 - one . 1 filtrate was evaporated to dryness in vacuo . The residue was crystallised from ethanol - light ...
Page 2228
... crystals . The oily residue ( 1.2 g . ) resulting from evaporation of the filtrate ( after removal of the crystals ) was essentially pure quinone . The total product ( 9.0 g . , 94 % ) is of adequate purity to be used directly in the ...
... crystals . The oily residue ( 1.2 g . ) resulting from evaporation of the filtrate ( after removal of the crystals ) was essentially pure quinone . The total product ( 9.0 g . , 94 % ) is of adequate purity to be used directly in the ...
Page 2725
... Crystals ( 11 g . ) separ- ated from the cool solution and were filtered off and re- crystallized from methanol - chloroform to give needles , m.p. 187-188 ° ; max . 279 and 326 nm . ( log ɛ 4 · 09 and 4 · 45 ) ; V 1740 , 1650 , 1585 ...
... Crystals ( 11 g . ) separ- ated from the cool solution and were filtered off and re- crystallized from methanol - chloroform to give needles , m.p. 187-188 ° ; max . 279 and 326 nm . ( log ɛ 4 · 09 and 4 · 45 ) ; V 1740 , 1650 , 1585 ...
Contents
Organic chemistry | 2023 |
Constituents of Withania somnifera Dun Part XII The withanolides of an Indian chemotype | 2032 |
Cyclic hydroxamic acids Part I Synthesis and reactions of 12dihydro1hydroxy46dimethyl2oxo | 2044 |
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acetic acid acetic anhydride acetone acetyl alcohol aldehyde alumina Amer amine ammonia anhydride anhydrous aqueous aromatic atom benzene benzyl bromide CH₂ Chem chloride chloroform chromatographed cm.¹ cm¯¹ cm¹ compound cooled crystallised cyclisation decomp derivative dichloromethane dilute dimer dimethyl dimethylformamide dioxan dried eluted ester ethanol ethyl acetate evaporated extracted with ether filtered filtrate Found gave give heated under reflux hydrochloric acid hydrolysis hydroxide i.r. spectrum iodide isolated isomer ketone lithium aluminium hydride methyl mixed m.p. mixture was stirred mmHg mmol mmole mole n.m.r. spectrum needles nitrogen obtained olefinic oxidation peroxide phenol potassium prepared protons pyridine reaction reduction reflux requires residue ring room temperature salt signals singlet sodium borohydride sodium hydroxide solid solution solvent spectra structure synthesis tetrahydrofuran treatment yield