Gold-Catalyzed Reactions between Alkenyldiazo Carbonyl Species and Acetals
摘要:
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.
Development of a Povarov Reaction/Carbene Generation Sequence for Alkenyldiazocarbonyl Compounds
作者:Appaso Mahadev Jadhav、Vinayak Vishnu Pagar、Rai-Shung Liu
DOI:10.1002/anie.201205692
日期:2012.11.19
Rings aplenty: A HOTf‐catalyzed (Tf=trifluoromethanesulfonyl) Povarovreaction of alkenyldiazo species has been developed and delivers diazo‐containing cycloadducts stereoselectively (see scheme). The resulting cycloadducts provide access to six‐ and seven‐membered azacycles through the generation of metal carbenes as well as the functionalization of diazo group.
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.