Unexpected Catalytic Reactions of Silyl-Protected Enol Diazoacetates with Nitrile Oxides That Form 5-Arylaminofuran-2(3<i>H</i>)-one-4-carboxylates
作者:Xinfang Xu、Dmitry Shabashov、Peter Y. Zavalij、Michael P. Doyle
DOI:10.1021/ol203331r
日期:2012.2.3
Silyl-protected enol diazoacetates undergo dirhodium(II)-catalyzed reactions with nitrile oxides to form acid-labile ketenimines via dipolar cycloaddition of nitrile oxides to a donor/acceptor cyclopropene and Lossen rearrangement of the dipolar adduct; acid catalysis converts the ketenimine to the furan product.
Substrate-Dependent Divergent Outcomes from Catalytic Reactions of Silyl-Protected Enol Diazoacetates with Nitrile Oxides: Azabicyclo[3.1.0]hexanes or 5-Arylaminofuran-2(3<i>H</i>)-ones
作者:Xinfang Xu、Dmitry Shabashov、Peter Y. Zavalij、Michael P. Doyle
DOI:10.1021/jo3006733
日期:2012.6.15
Dirhodium(II)-catalyzed reactions of silyl-protected enol diazoacetates with nitrile oxides exhibit high nitrile oxide substituent dependence in the production rearrangement products via dipolar cycloaddition and either the Neber rearrangement or the Lossen rearrangement.