4-Fluorocyclohexa-2,5-dienones as new acceptors for the Hauser annulation
作者:Pallab Pahari、Bidyut Senapati、Dipakranjan Mal
DOI:10.1016/j.tetlet.2007.01.159
日期:2007.4
4-Fluorocyclohexa-2,5-dienones are introduced as new acceptors for the Hauser annulation. In cases where the corresponding methoxy analogs fail to undergo annulation, the former smoothly do so with phenylsulfonyl phthalides to furnish anthraquinones in good yields. Steric effects are implicated to explain the inertness of the methoxy analogs.