Report for: A highly efficient green synthesis of 1, 8-dioxo-octahydroxanthenes

Title	A highly efficient green synthesis of 1, 8-dioxo-octahydroxanthenes
Published in	BMC Chemistry, December 2011
DOI	10.1186/1752-153x-5-81
Pubmed ID	22152051
Authors	Andivelu Ilangovan, Subramani Malayappasamy, Samraj Muralidharan, Sundaram Maruthamuthu
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.

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A highly efficient green synthesis of 1, 8-dioxo-octahydroxanthenes