A facile method of trifluoroacylation of imidazoles, 1,3-thiazoles, and 1,3-oxazoles with trifluoroacetic anhydride resulted in a set of heterocyclic trifluoromethyl-containing ketones. Unlike common ketones, these compounds form stable hydrates and enter into noncatalytic ene reactions with terminal olefins affording the corresponding allyl alcohols.
Synthesis, Stability, and Photoreactivity of Diazirinyl-Substituted<i>N-</i>Heterocycles Based on Indole, Benzimidazole, and Imidazole
作者:Björn Raimer、Thomas Wartmann、Peter G. Jones、Thomas Lindel
DOI:10.1002/ejoc.201402354
日期:2014.9
The synthesis, thermal stability, and photoreactivity of trifluoromethyl diazirines installed at the heterocyclic section of N-methylindole, N-methylbenzimidazole, and at N-methylimidazole were investigated. N-Tosyl-3-diazirinylindole and N-methyl-2-diazirinylbenzimidazole proved to be thermally stable, whereas the corresponding 2-diazirinylindole was not. The least stable was 2-diazirinylimidazole