Visible‐Light‐Driven N‐Heterocyclic Carbene Catalyzed γ‐ and
<i>ϵ</i>
‐Alkylation with Alkyl Radicals
作者:Lei Dai、Zi‐Hao Xia、Yuan‐Yuan Gao、Zhong‐Hua Gao、Song Ye
DOI:10.1002/anie.201909017
日期:2019.12.9
The merging of photoredoxcatalysis and N-heterocyclic carbene (NHC) catalysis for γ- and ϵ-alkylation of enals with alkyl radicals was developed. The alkylation reaction of γ-oxidized enals with alkyl halides worked well for the synthesis γ-multisubstituted-α,β-unsaturated esters, including those with challenging vicinal all-carbon quaternary centers. The synthesis of ϵ-multisubstituted-α,β-γ,δ-diunsaturated