Enantioselective [4+2] cycloaddition of ketenes and 9,10-phenanthrenequinone catalyzed by N-heterocyclic carbenes

✍ Scribed by Pan-Lin Shao; Xiang-Yu Chen; Li-Hui Sun; Song Ye

• Book ID: 104097546
• Publisher: Elsevier Science
• Year: 2010
• Tongue: French
• Weight: 360 KB
• Volume: 51
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/j.tetlet.2010.02.122

✦ Synopsis

Chiral N-heterocyclic carbenes were found to be efficient catalysts for the formal [4+2] cycloaddition reaction of alkyl(aryl)ketenes and 9,10-phenanthrenequinone to give the corresponding cycloadducts in good yields with high enantioselectivities.