反应详情

Following the procedure as described in EXAMPLE 12 and making non-critical variations using 3-fluoro-2-methylaniline to replace cyclohexanemethylamine, and 4-[(2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)methyl]benzoic acid to replace 3-[(2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)methyl]benzoic acid, N-(3-fluoro-2-methylphenyl)-4-[(2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)methyl]benzamide was obtained (35%) as a colorless solid: mp 143-144° C.; 1H NMR (300 MHz, CDCl3) δ 7.91-7.84 (m, 2H), 7.74-7.64 (m, 2H), 7.52-7.45 (m, 2H), 7.29-7.17 (m, 3H), 7.10-7.02 (m, 1H), 6.96-6.87 (m, 1H), 6.80-6.74 (m, 1H), 6.49 (s, 1H), 6.44 (s, 1H), 5.04 (ABq, 2H), 4.85 (ABq, 2H), 4.60-4.51 (m, 2H), 3.10-2.91 (m, 2H), 2.23 (d, J=1.51 Hz, 3H); MS (ES+) m/z 521.0 (M+1).