Clarke Paul A, Martin William H C
School of Chemistry, University of Nottingham, University Park, United Kingdom.
Org Lett. 2002 Dec 12;4(25):4527-9. doi: 10.1021/ol027081j.
[reaction: see text] Aldol reactions of beta-ketoesters with aldehydes followed by a tandem Knoevenagel condensation, with a further equivalent of aldehyde, and intramolecular Michael addition produces single diastereomers of highly substituted tetrahydropyran-4-ones.