Methanol → HCID 68292906, compound

Participants

Reaction Steps

Compound 132 (400 mg, 1.71 mmol) was first dissolved in acetonitrile (20 mL), with potassium permanganate (952 mg, 5.13 mmol) and alumina (1.2 g) added into the solution in batch. After stirring the resulting mixture at room temperature for 40 min, CH3OH (1 mL) was added to reduce excess oxidant. The mixture was then filtered and the solid material was washed with DCM:CH3OH=10:1. The filtrate was concentrated, and purified with silica gel column chromatography (EtOAc:TEA=1:0.1) to give compound 133 (110 mg, 30%) as a yellow solid. 1H NMR (400 MHz, CDCl3) δ9.32-9.37 (m, 1H), 8.37-8.42 (m, 1H), 7.35-7.41 (m, 1H), 6.97 (br s, 2H), 2.98 (t, 2H, J=7.2 Hz), 2.78 (d, 2H, J=7.2 Hz), 2.17-2.26 (m, 2H).

Provenance & Evidence