| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| (3E)-3-(4-甲基亚苄基)-1,3-二氢-2H-吲哚-2-酮 | 3-(4-methylbenzylidene)indolin-2-one | 391613-98-2 | C16H13NO | 235.285 |
| N-甲基吲哚酮 | N-methyl-2-indolinone | 61-70-1 | C9H9NO | 147.177 |
[3 + 2] annulations of spirocyclopropyl oxindoles with ynamides to offer biologically important spirocyclopenteneoxindoles in high yields with good diastereoselectivities were developed.
This report has realized the catalytic asymmetric [3+2] annulation of benzylideneindolinones with CF3‐containing isatin‐derived azomethine ylides for the first time, in which the organocatalysis has failed. In the presence of dinuclear zinc catalysts, a series of functionalized 2,3‐pyrrolidinyl dispirooxindoles have been synthesized in good yields with excellent stereoselectivity under mild reaction conditions. This protocol can be run on a gram scale and a possible catalytic mechanism is proposed.