反应详情

Diethyl azodicarboxylate (14.5 mL, 73.56 mmol) was added dropwise at 0° C. to a stirred suspension of propan-2-ol (4.7 mL, 61.30 mmol), triphenylphosphine (19.30 g, 73.56 mmol), and N-hydroxyphthalimide (10.00 g, 61.30 mmol) in THF (50 mL). The mixture was stirred at room temperature for 20 h and evaporated to dryness. The product was purified by flash column chromatography using gradient elution from petroleum ether/EtOAc (9:1) to petroleum ether/EtOAc (5:1) to yield 2-isopropoxy-isoindole-1,3-dione (LIX, 10.92 g, 87%). 400 MHz 1H NMR (DMSO-d6, ppm): 7.86 (4H, s), 4.44 (1H, septet, J=6.2 Hz), 1.28 (6H, d, J=6.2 Hz).

1. customevaporated to dryness
2. customThe product was purified by flash column chromatography
3. washelution from petroleum ether/EtOAc (9:1) to petroleum ether/EtOAc (5:1)