366453-22-7

Step b: A mixed solution of methyl 2-bromomethyl-3-methoxybenzoate (997 mg, 3.85 mmol) and ammonium hydroxide (9 mL) in THF (19 mL) was reacted with stirring at room temperature for 4 hours. After completion of the reaction, the reaction mixture was concentrated to dryness under reduced pressure. The resulting residue was purified by fast column chromatography (eluent: hexane/ethyl acetate, 40/60 with 1% methanol) to afford 4-methoxyisoindolin-1-one as a white solid (595 mg, 95% yield).

[1] Chinese Chemical Letters, 2012, vol. 23, # 1, p. 9 - 12
[2] Patent: WO2004/26875, 2004, A1. Location in patent: Page 38
[3] Patent: US2004/106791, 2004, A1. Location in patent: Page 9
[4] Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 2, p. 814 - 819