Synthesis of α,β-Unsaturated δ-Lactones by Vinyl Acetate Mediated Asymmetric Cross-Aldol Reaction of Acetaldehyde: Mechanistic Insights
作者:Manjeet Kumar、Arvind Kumar、Masood Rizvi、Manoj Mane、Kumar Vanka、Subhash C. Taneja、Bhahwal Ali Shah
DOI:10.1002/ejoc.201402551
日期:2014.8
using this methodology we have accessed α,β-unstaurated δ-lactones as well as isochromenones with high enantioselectivities from both asymmetric β-hydroxy aldehydes and ketones. Systemic density functional theory (DFT) studies were also performed to gain mechanisticinsights into the role of hydrogen bonding in the asymmetric cross-aldol reaction of acetaldehyde and in the key cis/trans isomerisation