反应详情

Following the procedure as described in EXAMPLE 9.67 and making non-critical variations using 2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one to replace 7H-spiro[benzofuro[4,5-c][1,2,5]oxadiazole-8,3′-indolin]-2′-one, and ethyl 4-(bromomethyl)benzoate to replace 5-(benzyloxy)-2-(chloromethyl)pyridine, ethyl 4-[(2′-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-1′(2′H)-yl)methyl]benzoate was obtained (95%) as a colorless solid: 1H NMR (300 MHz, CDCl3) δ 8.03 (d, J=8.4 Hz, 2H), 7.39 (d, J=8.1 Hz, 2H), 7.21-7.16 (m, 2H), 7.03 (t, J=7.5 Hz, 1H), 6.72 (d, J=7.5 Hz, 1H), 6.52 (s, 1H), 6.24 (s, 1H), 5.14 (d, J=15.9 Hz, 1H), 4.95 (d, J=9.0 Hz, 1H), 4.87 (d, J=15.9 Hz, 1H), 4.67 (d, J=8.7 Hz, 1H), 4.36 (q, J=7.1 Hz, 2H), 4.22-4.19 (m, 2H), 4.15-4.12 (m, 2H), 1.38 (t, J=7.1 Hz, 3H); MS (ES+) m/z 458.1 (M+1).