Li-Wen Shen , Nian Luo , Yun-Qing Jia , Guang-Wei Wang , Shu-Pei Yuan , Min Xiang
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Lewis base promoted [4 + 2] annulation of o-acylamino-aryl MBH carbonates with isatin†
The first example of Lewis base promoted [4 + 2] annulation between o-acylamino-aryl MBH carbonates and isatin has been developed. This methodology exhibits excellent substrate applicability and has synthesized 1,4-dihydrospiro benzo[d][1,3]oxazine-oxindoles with yields up to 98%. The practical value of this method is underscored by its successful application in a 50-fold scale-up.
![Lewis base promoted [4 + 2] annulation of o-acylamino-aryl MBH carbonates with isatin†](https://img.booksci.cn/booksciimg/2024-9/2024091410510293997592.png)
![Lewis base promoted [4 + 2] annulation of o-acylamino-aryl MBH carbonates with isatin†](https://img.booksci.cn/booksciimg/2024-9/98292965741758100884.jpg)
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