Qin, Hui published the artcileA convenient cyclopropanation process of oxindoles via bromoethylsulfonium salt, Quality Control of 71293-59-9, the main research area is oxindole bromoethylsulfonium triflate cyclopropanation; spirocyclopropane indolinone preparation.
A practical convenient conversion of oxindoles into the corresponding spirocyclopropane-oxindoles, e.g., I, is achieved efficiently using bromoethylsulfonium salt, which is easily prepared on a large scale and is stable crystalline This reaction of bromoethylsulfonium salt with different substituted unprotected oxindoles proceeded under mild condition and provided moderate yields.
Tetrahedron published new progress about Cyclopropanation. 71293-59-9 belongs to class indole-building-block, name is 5,6-Dichloroindolin-2-one, and the molecular formula is C8H5Cl2NO, Quality Control of 71293-59-9.
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