4-Nitrophthalide → 4-Amino-1,3-dihydro-2-benzofuran-1-one

참여 물질

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A suspension of 4-nitroisobenzofuran-1(3H)-one (1.0 g, 5.58 mmol) and 10% Pd/C (0.1 g) in ethyl acetate (30 mL) was purged in 1 atm hydrogen and stirred at 25° C. for 3 hr. The mixture was filtered, and the filtrate was concentrated to give 4-aminoisobenzofuran-1(3H)-one (0.8 g, yield 96%) as a off-white solid. MS (ESI) m/z: 150(M+1)+. 1H-NMR (400 MHz, CDCl3) δ 3.82 (s, br 1H), 5.19 (s, 3H), 6.91-6.95 (m, 1H), 7.32-7.36 (m, 2H).

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