Bicyclic enediones of various sizes can be efficiently assembled by intramolecular Stetter cyclisation of readily available Morita-Baylis-Hillman adducts.

Ring closure reactions O 0130 Intramolecular Stetter Cyclization of Morita-Baylis-Hillman Adducts: A Versatile Approach Towards Bicycloenediones. -An efficient protocol for the synthesis of bicyclic enediones involves a Morita-Baylis-Hillman coupling and a subsequent intramolecular Stetter cyclization as key steps. -(WASNAIRE, P.; DE MERODE, T.; MARKO*, I. E.; Chem. Commun. (Cambridge) 2007, 45, 4755-4757; Lab. Chim. Org., Univ. Cathol. Louvain, B-1348 Louvain-la-Neuve, Belg.; Eng.) -D. Singer 13-026