title: A highly efficient green synthesis of 1, 8-dioxo-octahydroxanthenes.
abstract: SmCl3 (20 mol%) has been used as an efficient catalyst for reaction between aromatic aldehydes and 5,5-dimethyl-1,3-cyclohexanedione at 120°C to give 1,8-dioxo-octahydroxanthene derivatives in high yield. The same reaction in water, at room temperature gave only the open chain analogue of 1,8-dioxo-octahydroxanthene. Use of eco-friendly green Lewis acid, readily available catalyst and easy isolation of the product makes this a convenient method for the synthesis of either of the products.
authors.affiliation: School of Chemistry, Bharathidasan University, Tiruchirappalli - 620024, India. ilangovanbdu@yahoo.com.
authors.forename: Andivelu
authors.initials: A
authors.lastname: Ilangovan
authors.forename: Subramani
authors.initials: S
authors.lastname: Malayappasamy
authors.forename: Samraj
authors.initials: S
authors.lastname: Muralidharan
authors.forename: Sundaram
authors.initials: S
authors.lastname: Maruthamuthu