Synfacts, Table of Contents Synfacts 2018; 14(10): 1048DOI: 10.1055/s-0037-1610888 Metal-Catalyzed Asymmetric Synthesis and Stereoselective Reactions © Georg Thieme Verlag Stuttgart · New York Ytterbium-Catalyzed [4+2] Cycloaddition of Cyclobutenones with α-Keto Esters Contributor(s): Hisashi Yamamoto , Tomohiro Hattori Recommend Article Abstract Buy Article Key words Key wordsytterbium catalysis - [4+2] cycloaddition - lactones - cyclobutenones - keto esters Full Text