U. Kuhl et U. Holzgrabe, A sequence of aldol condensations and a Michael addition giving a cyclohexenone ring system, MONATS CHEM, 132(3), 2001, pp. 407-410
The reaction of 1,5-diphenylpentanetrione, 4-chlorobenzaldehyde, and aceton
e in the presence of methylamine resulted in 2,6-dibenzoyl-5-(4-chlorphenyl
)-3-methyl-cyclohex-2-en-1-one, which was formed by a sequence of a Knoeven
agel reaction, an aldol condensation, and a Michael addition in a one-pot r
eaction.