E-selective isomerization of stilbenes and stilbenoids through reversible hydroboration
作者:Erin E. Gray、Lake E. Rabenold、Brian C. Goess
DOI:10.1016/j.tetlet.2011.09.046
日期:2011.11
Hydroboration of a mixture of E and Z stilbenes and stilbenoids is followed by an elimination reaction to yield the E isomer with high stereoselectivity. The reaction tolerates aromatic substituents with varying stereoelectronic properties, occurs in one pot, and requires only commercially available reagents. An illustration of the isomerization reaction in a synthesis of resveratrol, a biologically
Nazarov Cyclization of Divinyl and Arylvinyl Epoxides: Application in the Synthesis of Resveratrol-Based Natural Products
作者:Gangarajula Sudhakar、Kovela Satish
DOI:10.1002/chem.201500362
日期:2015.4.20
New variation in the Nazarovcyclization has been developed by preparing divinyl and arylvinyl epoxides as pentadienyl cation precursors for the first time. Highly substituted cyclopentadienes, hydrindienes, and indenes were synthesized to demonstrate the compatibility of this reaction with substrates bearing a variety of substitutions and having different types of epoxides. Application of this method