Multiple Electrophilic Substitution of 1,1,2,2,9,9,10,10-Octafluoro[2.2]paracyclophane
摘要:
Synthetic methods for introduction of two substituents into the rings of octafluoroparacyclophane are presented. Nitration gives three isomers with nitro substituents on different rings: pseudoortho, pseudo-mete, and pseudo-para, in equal amounts. These dinitro compounds are shown to be precursors of a variety of other disubstituted OFF derivatives. Methods of characterization of isomeric disubstituted OFPs are extensively discussed, and the H-1 and F-19 NMR spectra of these derivatives are analyzed explicitly.
The First Synthesis and Characterization of Both Diastereomers of a Di[2.2]paracyclophane: 4,4‘-Bis(1,1,2,2,9,9,10,10-octafluoro[2.2]paracyclophane)
作者:A. J. Roche、J.-X. Duan、W. R. Dolbier,、K. A. Abboud
DOI:10.1021/jo0157775
日期:2001.10.1
of two [2.2]paracyclophane units linked through a single 4,4' bond are described. Both the meso and d,l diastereomers of 4,4'-bis(octafluoro[2.2]paracyclophane) have been prepared via a palladium-catalyzed reductive homocoupling reaction by copper, producing a 3:2 ratio of meso and d,l diastereomers. A similar reductive homocoupling of pseudo-o-iodotrifluoromethyloctafluoro[2.2]paracyclophane gave only