1. on catalytic asymmetric aldol additions see;Sodeoka;Synlett Angew Chem Engl Tetrahedron Asymmetry,1997
2. For examples of primarily anti - selective catalytic asymmetric aldol additions , see;Evans;Am Chem SOC Tetrahedron Lett,1997
3. For reviews of the aldol reaction of boron enolates see In Coniprehesive Organic Svnthesis : Additions to Bonds Part Pergamon Press;Kim;React,1991