I found the field of Chemistry very interesting. Saw the article KOH-mediated stereoselective alkylation of 3-bromooxindoles for the synthesis of 3,3 ‘-disubstituted oxindoles with two contiguous all carbon quaternary centres published in 2021.0. Quality Control of 3,4-Dimethoxybenzaldehyde, Reprint Addresses Singh, RP (corresponding author), Indian Inst Technol, Dept Chem, Hauz Khas, New Delhi 110016, India.. The CAS is 120-14-9. Through research, I have a further understanding and discovery of 3,4-Dimethoxybenzaldehyde
The stereoselective synthesis of 3,3 ‘-disubstituted oxindoles having all-carbon quaternary stereocenters has been achieved using KOH as a base with an excellent diastereomeric ratio (98 : 2). The practicability of the present methodology has been validated with the synthesis of a series of substrates in good to excellent yields. The aesthetic simplicity, accessibility, and eco-friendly base (KOH) have prompted the broader application of the present methodology in organic synthesis.
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Reference:
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