Catalytic iron-mediated ene carbocyclizations: formal [4+4]-ene reactions of triene esters
作者:James M. Takacs、Peter W. Newsome、Cynthia Kuehn、Fusao Takusagawa
DOI:10.1016/s0040-4020(01)87749-8
日期:1990.1
2-Substituted-2,7,9-decatrienoates undergo an iron-catalyzed carbocyclization to yield trans-disubstituted cyclopentanes in moderate-to-good chemical yields. The cyclization products are formally the result of a [4+4]-ene reaction in which cis-propenyl and 2-acroyl functionalities are introduced as appendages to the newly formed cyclopentane ring by the cyclization. Triene ester substrates bearing
Arylation of Aldehyde Homoenolates with Aryl Bromides
作者:Kevin Cheng、Patrick J. Walsh
DOI:10.1021/ol4008876
日期:2013.5.3
A mild palladium catalyzed coupling of reactive aldehyde homoenolates with aryl bromides is described. Aldehyde homoenolates are generated by ring opening of cyclopropanols via a C-C cleavage step. The coupling generates aldehyde products at room temperature in 59-93% yield.