Pp. Baruah et al., CU(II)-CATALYZED MICHAEL ADDITION OF 1,3-DICARBONYL COMPOUNDS, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 37(5), 1998, pp. 425-426
Copper sulphate pentahydrate catalyses the C-C bond formation via Mich
ael addition of 1,3-dicarbonyl compounds 1 under mild and neutral cond
itions at ambient temperature and furnishes the products 3 in high yie
lds.