Gold-catalyzed α-furanylations of quinoline N-oxides with alkenyldiazo carbonyl species
作者:Vinayak Vishnu Pagar、Rai-Shung Liu
DOI:10.1039/c5ob00696a
日期:——
Gold-catalyzed α-furanylations of 8-alkylquinoline N-oxides have been achieved using alkenyldiazo carbonyl species as nucleophiles. The reactions are applicable to a reasonable range of alkenyldiazo species and 8-alkylquinoline N-oxides. The reaction mechanism is postulated to involve an initial nucleophilic addition of diazocarbonyl species at 8-alkylquinoline N-oxides, followed by diazo decomposition.
Photocatalytic (3 + 3) Annnulation of Vinyldiazo Compounds and Aminocyclopropanes
作者:Sen Li、Lei Zhou
DOI:10.1021/acs.orglett.4c00963
日期:2024.4.19
allows the regioselective synthesis of cyclohexenes bearing adjacent amino and carbonyl groups with broad functional group tolerance. In a departure from previous reports, our work demonstrated that a distonic radical cation can be preferentially intercepted by weakly nucleophilic vinyldiazo compounds, followed by an exclusive 6-endo radicalcyclization for ring closure. Based on the interaction between
Gold-Catalyzed Reactions between Alkenyldiazo Carbonyl Species and Acetals
作者:Vinayak Vishnu Pagar、Appaso M. Jadhav、Rai-Shung Liu
DOI:10.1021/jo400419d
日期:2013.6.7
In the presence of catalyst IPrAuSbF6 catalyst (IPr = 1,3-bis(diisopropylphenyl)imidazol-2-ylidene), alkenyldiazo carbonyl species react with organic acetals to give E-configured alkyl 3,5-dimethoxy-5-pent-2-enoates stereoselectively. This reaction sequence comprises an initial Prins-type reaction, followed by gold carbene formation.