Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
Org Lett. 2010 Mar 5;12(5):1008-11. doi: 10.1021/ol100020v.
A bifunctional organocatalytic asymmetric formal [4 + 2] cycloaddition reaction of Nazarov reagents and methyleneindolinones afforded spiro[4-cyclohexanone-1,3'-oxindoline] derivatives with excellent enantioselectivity (up to 98% ee).
Nazarov 试剂与亚甲基茚满酮的双功能有机催化不对称形式[4+2]环加成反应,以优异的对映选择性(高达 98%ee)得到螺[4-环己酮-1,3'-氧吲哚]衍生物。