title: Catalytic, formal homo-Nazarov-type cyclizations of alkylidene cyclopropane-1,1-ketoesters: access to functionalized arenes and heteroaromatics.
abstract: A catalytic, formal homo-Nazarov-type cyclization of alkylidene cyclopropanes (ACPs) to give functionalized arenes and heteroaromatics is reported. In the presence of a Lewis acid catalyst, the ACP 1,1-ketoesters undergo distal bond cleavage to afford an allyl cation intermediate. Adjacent π-attack on the allyl cation then provides a six-membered ring that undergoes rapid aromatization. In these cases, benzenoid products are formed in up to 98% yield. Strategic choice of the substitution about the ACP allows for the generation of other useful isomeric products in good yields.
authors.affiliation: School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: Joel
authors.initials: J
authors.lastname: Aponte-Guzmán
authors.forename: J Evans
authors.initials: JE
authors.lastname: Taylor
authors.forename: Elayna
authors.initials: E
authors.lastname: Tillman
authors.forename: Stefan
authors.initials: S
authors.lastname: France