S. Saito et al., A NEW ANNULATION BASED ON A ONE-POT DOUBLE MICHAEL ADDITION USING ALUMINUM TRIS(2,6-DIPHENYLPHENOXIDE) (ATPH), Synlett, (4), 1997, pp. 359
An annulation system based on sequential inter- and intramolecular Mic
hael addition was realized by the combined use of ketone enolates and
aluminum tris(2,6-diphenylphenoxide)(ATPH).