2006 Volume 79 Issue 2 Pages 333-335
We studied the formation of 2,2′-diacyl-9,9′-bifluorenylidene from 2-acyl-9-bromofluorene via the corresponding intermediate 9-bromo-9,9′-bifluorenyl. It was found that dehydrobromination of the 9-bromo-9,9′-bifluorenyl derivatives occurred through the E2 elimination sequence, suggesting that the configuration of 9-bromo-9,9′-bifluorenyl isomers determined the stereochemistry of the product. Facile isomerization of the formed 9,9′-bifluorenylidenes may give the observed stereo-selectivity depending upon the length of the acyl side chain.
This article cannot obtain the latest cited-by information.