Synthetic Route of 52351-75-4, A common heterocyclic compound, 52351-75-4, name is 6-Methoxyindoline-2,3-dione, molecular formula is C9H7NO3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
General procedure: To a mixture of 2-hydroxy-1,4-naphthoquinone (1 mmol), isatin (1 mmol) and CH3COOH10 mL, 5-aminotetrazole (1 mmol) was added. The mixture was stirred at reflux for an appropriatetime (Table 2). After completion of the reaction (TLC), the reaction mixture was cooled to roomtemperature and the solvent was evaporated under reduced pressure. Then, the crude product waswashed sequentially with 20 mL saturated NaHCO3 and 20 mL brine, purified by silica gel columnchromatography using petroleum ether: ethyl acetate (v:v = 1:1) as eluent to afford the pure product 4(the copies of all spectral data see Supplementary Materials).
The synthetic route of 52351-75-4 has been constantly updated, and we look forward to future research findings.
Reference:
Article; Wu, Liqiang; Liu, Yunxia; Li, Yazhen; Molecules; vol. 23; 9; (2018);,
Indoline – Wikipedia,
Indoline | C8H9N – PubChem