title: Gold-catalyzed formal [4π+2π]-cycloadditions of tert-butyl propiolates with aldehydes and ketones to form 4H-1,3-dioxine derivatives.
abstract: Gold-catalyzed formal hetero-[4π+2π] cycloadditions of tert-butyl propiolates with carbonyl compounds proceeded efficiently to yield 4H-1,3-dioxine derivatives over a wide scope of substrates. With acetone as a promoter, gold-catalyzed cycloadditions of these propiolate derivatives with enol ethers led to the formation of atypical [4+2]-cycloadducts with skeletal rearrangement.
authors.affiliation: Department of Chemistry, National Tsing Hua University101, Sec. 2, Kuang-Fu Rd., Hsinchu, 30013, Taiwan. rsliu@mx.nthu.edu.tw.
authors.forename: Somnath Narayan
authors.initials: SN
authors.lastname: Karad
authors.forename: Wei-Kang
authors.initials: WK
authors.lastname: Chung
authors.forename: Rai-Shung
authors.initials: RS
authors.lastname: Liu