Phenolics are weakly acidic and moderately soluble in water. Substituent groups (e.g., chloro, nitro, methyl, etc.) attached to the phenolic structure modify the compound's acidity, solubility, and toxicity. Quantitative structure鈥揳ctivity relationships allow reasonably good prediction of a phenol...
any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups a toxic white soluble crystalline acidic derivative of benzene; used in manufacturing and as a disinfectant and antiseptic; poisonous if taken internally ...
phenol- any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups pyrogallic acid,pyrogallol- a toxic white lustrous crystalline phenol used to treat certain skin diseases and as a photographic developer ...
Since our earlier studies of 23 individual weakly acidic constituents of cigarette smoke indicated that benzenes having vicinal oxygenation or a conjugated... Tommy,Jansson,and,... - 《Mutation Research/genetic Toxicology》 被引量: 108发表: 1988年 Studies on the occurrence and distribution of wood...
OOO--OO---+OHO-Na+NaOHH2O+H2OO-Na+OH++CO2H2O+NaHCO3吸电基使取代酚的酸性进一步增强。OHH+SubstituentEffectsOnTheAcidityofPhenolsAlkylsubstitutionproducesnegligiblechangesinacidities,asdoweaklyelectronegativegroupsattachedtothering.Onlywhenthesubstituentis...
O -Benzyl-protected phenols are known to undergo debenzyla-tion with trifluoroacetic acid (TFA)8by an initial protonation of the weakly basic phenol oxygen,although additives such as strong organic acids (e.g.,trifluoromethanesulfonic acid 9)or a large excess of nucleophilic scavenger (e....
(NSC74859) 2 OBn OH O-Benzyl-protected phenols are known to undergo debenzyla- O OR O OR tion with trifluoroacetic acid (TFA)8 by an initial protonation of the weakly basic phenol oxygen, although additives such as strong 2 (R = Bn) 4 (R = Bn) b c 3 (R = H) 5 (R = ...
O -Benzyl-protected phenols are known to undergo debenzyla-tion with trifluoroacetic acid (TFA)8by an initial protonation of the weakly basic phenol oxygen,although additives such as strong organic acids (e.g.,trifluoromethanesulfonic acid 9)or a large excess of nucleophilic scavenger (e....
are weakly hydrophobic compared to DEHP (Bauer and Herrmann1998) as shown by their octanol/water partition coefficient (logKOW) (Table2) and Asakura et al. (2004) noted that DMP and DEP are easily leached out from waste than the more hydrophobic DEHP. One would therefore expect higher ...
Reacting phenols with amination agent in presence of low alkali and weakly acidic alumina catalyst to form desired anilines in high yields and selectivitydoi:US5545753 AThe alumina catalyst used in the present invention is characterized by having the alkali metal oxide content of less than 0.5% ...