| Abstract
| - Difluorodienes result from the double dehydrobromination of4-aryl-1,3-dibromo-1,1-difluorobutaneswith DBU. Attempted syntheses of analogous 4-alkyl or 4-alkoxydienes yield monoeliminationproducts under mild conditions and unexpected trifluoro compounds undermore vigorous conditions.4-Aryl-1,1-difluoro-1,3-butadienes react rapidly with4-phenyl-1,2,4-triazoline-3,5-dione in Diels−Alder reactions, but these dienes are unreactive toward several otherelectron-deficient and electron-rich dienophiles.
|
