Synthetic Route of 90725-50-1, A common heterocyclic compound, 90725-50-1, name is 6-Bromo-3-methylindolin-2-one, molecular formula is C9H8BrNO, 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.
6-bromo-3 -methyl- 1, 3 -dihydro-2H-indol-2-one A.20 (15g, 66.35mmol) was combined with 70ml of acetic anhydride. The solution was heated at 1100C for 2 days before it was concentrated under vacuum. The oil obtained was diluted with ethyl acetate and washed in succession with saturated NaHCO3, water, and brine. The organics were dried over MgSO4 before they were concentrated under vacuum. The residue obtained was heated in EtOH (80ml) to form a clear reddish solution. After cooling to -150C and standing overnight, a light brown solid was collected by filtration as 1 -acetyl-6-bromo-3 -methyl- 1,3 -dihydro-2H-indol-2- one A.26 (8.8g, 50%) .IH NMR (500 MHz, DMSO-d6) delta ppm 8.25 (1 H, d, J=I.5 Hz), 7.43 (1 H, dd, J=7.8, 1.4 Hz), 7.38 (1 H, d, J=8.3 Hz), 3.78 (7 H, q, J=7.3 Hz), 2.56 (3 H, s), 1.42 (3 H, d, J=7.8 Hz).
The synthetic route of 90725-50-1 has been constantly updated, and we look forward to future research findings.