Homoallylboration of Aldehydes: Stereoselective Synthesis of Allylic-Substituted Alkenes and E-Alkenes
作者:Daniel Polyak、Bokai Xu、Isaac J. Krauss
DOI:10.1021/acs.orglett.2c01789
日期:2022.7.1
Cyclopropanated allylboration reagents participate in the homoallylation of aliphatic and aromatic aldehydes, generating substituted alkenes that are difficult to produce via other methods. In this study, we explored the scope and reactivity of homoallylation with cyclopropylcarbinylboronates bearing various aliphatic and aromatic α- and γ-substituents. α-Alkyl substituted boronates afforded E-disubstituted
Bicyclic Oxygen Heterocycles from γ,δ-Unsaturated Alcohols: Synthetic Targets Inspired by Blepharocalyxin D
作者:Adam J. Bunt、Christopher D. Bailey、Benjamin D. Cons、Sophie J. Edwards、Jon D. Elsworth、Tshepo Pheko、Christine L. Willis
DOI:10.1002/anie.201108315
日期:2012.4.16
yield with the creation of up to three stereocenters in a single pot by the acid‐mediated reaction of γ,δ‐unsaturated alcohols with aldehydes (see scheme, Bn=benzyl). This versatile reaction enables the stereoselective introduction of substituents at the C3, C4, C7, and C9 positions of the bicyclic framework.