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Tandem reaction of (E,Z)-ethyl 2-nitro-3-ethoxyacrylate (E:Z=25:75) with δ,ε-unsaturated alcohols leading to functionalized trans-fused bicyclic nitronates as single stereoisomers in high yields has been developed under thermal condition and in the presence of a catalytic amount of a Lewis acid catalyst such as Yb(OTf) 3 . This process involves the configurational control of transetherified...
Tandem reaction of (E)-1-ethoxy-2-nitroethylene with δ,ε-unsaturated alcohols leading to stereoselective trans-fused bicyclic γ-lactones has been developed using a catalytic amount of a Lewis acid such as Yb(OTf) 3 and Ni(ClO 4 ) 2 .6H 2 O. This process involves the stereoselective tandem transetherification-intramolecular hetero Diels-Alder reaction leading to bicyclic...
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