Birgit Potthoff, E. Breitmaier
Jun 1, 1986
Citations
0
Influential Citations
5
Citations
Journal
Chemische Berichte
Abstract
5,6-Dihydro-2H-pyrans by [4+2]-Cycloaddition of Diethyl Mesoxalate to 1-Alkoxy-1,3-butadienes The enantiomers of diethyl 3-alkyl-2-ethoxy-5,6-dihydro-2H-pyran-6,6-dicarboxylates 3 are obtained under mild conditions in yields >95% by [4+2]-cycloaddition of diethyl mesoxalate 2 to 2-alkyl-1-ethoxy-1,3-butadienes 1 which are easily prepared by Wittig alkenylation of 2-alkyl-3-ethoxyacroleins.