When Is a Trifluoromethyl Group More Lipophilic than a Methyl Group? Partition Coefficients and Selected Chemical Shifts of Aliphatic Alcohols and Trifluoroalcohols
作者:Norbert Muller
DOI:10.1002/jps.2600751016
日期:1986.10
Trifluorination strongly enhances lipophilicity only when the trifluoromethylgroup is in the alpha-position. The enhancement is barely measurable for the beta- and gamma-(trifluoromethyl) alcohols, while the delta- and epsilon-(trifluoromethyl) compounds are considerably more hydrophilic than their parent compounds. Chemicalshift comparisons suggest that the changes in relative lipophilicity are controlled primarily