Scheme 4From: A highly efficient green synthesis of 1, 8-dioxo-octahydroxanthenesProposed mechanism for the SmCl 3 catalysed synthesis of 3,3,6,6-tetramethyl-9-aryl-1,8-dioxo-2,3,4,5,6,7-hexahydroxanthene and its open chain form.Back to article page