Divergent synthesis of benzene derivatives: Brønsted acid catalyzed and iodine-promoted tandem cyclization of 5,2-enyn-1-ones.
2012
Highly substituted benzene derivatives, including alkoxy-, iodoalkoxy-, and diiodo-substituted benzenes, can be selectively synthesized via Bronsted acid catalyzed and iodine-promoted tandem carbocyclization respectively. This reaction involved a direct process for C–C bond formation from 5,2-enyn-1-ones, and different reaction systems (Bronsted acids/electrophiles with solvents) afforded different substituted benzenes. Furthermore, the halogenated moiety and alkoxy group can be readily introduced into the benzene in a position which has not been easily obtained previously.
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