1. Conceptually New Directed Aldol Condensation Using Aluminum Tris(2,6-diphenylphenoxide)
2. For the general aspects of the conformation (s-cisvss-trans) of unsaturated carbonyl compounds, see: Stereochemistry of OrganicCompounds; Eliel, E. L.; Wilen, S. H. Eds.; John Wiley & Sons: New York; 1994; Chapter 10.2., p 615. Also see the depiction below for two major conformations of an α,β-unsaturated carbonyl compound and diene, respectively. The definition for the conformations (s-transands-cis, where “s” denotes a “single bond”) of an extended dienolate is based on that for a diene.