Hybrid Metal/Organo Relay Catalysis Enables Enynes To Be Latent Dienes for Asymmetric Diels–Alder Reaction
作者:Zhi-Yong Han、Dian-Feng Chen、Ya-Yi Wang、Rui Guo、Pu-Sheng Wang、Chao Wang、Liu-Zhu Gong
DOI:10.1021/ja3007148
日期:2012.4.18
to serve as latent 1,3-silyloxydienes capable of participating in the first cascadehydrosiloxylation of an enynyl silanol/asymmetric Diels-Alder reaction. A variety of polycyclic compounds bearing multistereogenic centers were obtained in high yields and excellent enantioselectivities from the relaycatalyticcascadereaction between (2-(but-3-en-1-ynyl)phenyl) silanols and quinones catalyzed by the
We propose one-potsynthesis of siloles from readily available starting materials. This methodology is practical for the preparation of multisubstituted siloles in good to excellent yields with complete regioselectivity. Sequential reactions, such as lithiation, silylation, and diisobutylaluminum-hydride-promoted cyclization, enable the preparation of the siloles. This transformation provides siloles