Strategies for the synthesis of fluorinated liquid crystal derivatives from perbromofluoroaromatic systems
摘要:
The use of perbromofluorobenzene derivatives as starting materials for the synthesis of a variety of model liquid crystal systems by a combination of nucleophilic aromatic substitution, debromolithiation/trapping, dehydration and reduction processes is described. (C) 2010 Elsevier Ltd. All rights reserved.
Nucleophilic displacement in polyhalogenoaromatic compounds. Part 6. Kinetics of methoxydefluorination of polybromofluorobenzenes
作者:Roger Bolton、John P. B. Sandall
DOI:10.1039/p29780000137
日期:——
Rates of displacement of fluorine from a number of polybromofluorobenzenes by methanolic sodium methoxide have been measured at 323.2 K. The effects of bromine substituents, whether measured by substituent rate factors or by the two-term process described earlier, fall in a regular sequence of halogen effects, from fluorine to iodine. The poorer agreement between calculated and experimental figures