Organic reactions at high pressure. Michael addition of activated acyclic donors with β,⨿-disubstituted enone acceptors.
作者:William G Dauben、John M Gerdes
DOI:10.1016/s0040-4039(00)94290-4
日期:1983.1
Highpressure, 15 kbar (1.5 GPa), Michaeladditions of doubly activated acyclic donors to sterically hinderedenone acceptors with 1,5-diazabicyclo[4.3.0]non-5-ene in acetonitrile affords Michael adducts in 42–82% yield.
Direct 4-Alkylation of 1,3-Cyclohexanediones via Dianionic Species
作者:Nicola M. Berry、Mark C. P. Darey、Laurence M. Harwood
DOI:10.1055/s-1986-31679
日期:——
1,3-Cyclohexanediones are directly alkylated at the 4 position via dianionic species generated at - 78°C using lithium diisopropylamide/hexamethylphosphoric triamide. Acetylation of the reaction products at room temperature yields the 3-acetoxy-6-alkylcyclohex-2-enones selectively.