Jiang, Shi-Fen et al. published their research in Organic Letters in 2018 | CAS: 20780-72-7

4-Bromoindoline-2,3-dione (cas: 20780-72-7) belongs to indole derivatives. The indole subunit is an almost ubiquitous component of biologically active natural products, and its study has been the focus of research for decades. Due to this activity, the indole ring system has become an important component or intermediate in the synthesis of heterocycles.Formula: C8H4BrNO2

Switchable Access to 3-Carboxylate-4-quinolones and 1-Vinyl-3-carboxylate-4-quinolones via Oxidative Cyclization of Isatins and Alkynes was written by Jiang, Shi-Fen;Xu, Cheng;Zhou, Zhi-Wen;Zhang, Qin;Wen, Xiao-Hui;Jia, Feng-Cheng;Wu, An-Xin. And the article was included in Organic Letters in 2018.Formula: C8H4BrNO2 This article mentions the following:

Isatins underwent base-dependent oxidative cyclization or tandem oxidative cyclization and diastereoselective addition reactions with arylalkynoates such as PhCCCO2Me mediated by t-BuO2H in DMSO to yield quinolinones such as I (with Cs2CO3 as base) or oxoquinolinylpropenoates such as II (with K3PO4 as base). In the experiment, the researchers used many compounds, for example, 4-Bromoindoline-2,3-dione (cas: 20780-72-7Formula: C8H4BrNO2).

4-Bromoindoline-2,3-dione (cas: 20780-72-7) belongs to indole derivatives. The indole subunit is an almost ubiquitous component of biologically active natural products, and its study has been the focus of research for decades. Due to this activity, the indole ring system has become an important component or intermediate in the synthesis of heterocycles.Formula: C8H4BrNO2

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles