反应详情

Following the procedure as described in PREPARATION 2A and making non-critical variations using 4-(benzyloxy)phenol to replace 3-bromophenol, and 1-(diphenylmethyl)-4,6-dimethoxy-1H-indole-2,3-dione to replace 1-((5-(trifluoromethyl)furan-2-yl)methyl)indoline-2,3-dione, 1-(diphenylmethyl)-3-hydroxy-3-(7-hydroxy-2,3-dihydro-1,4-benzodioxin-6-yl)-4,6-dimethoxy-1,3-dihydro-2H-indol-2-one was obtained (50%) as a colorless solid: 1H NMR (300 MHz, CDCl3) δ8.81 (s, 1H), 7.34-7.16 (m, 10H), 6.82 (s, 1H), 6.55 (s, 1H), 6.31 (s, 1H), 6.14 (d, J=1.8 Hz, 1H), 5.64 (d, J=1.8 Hz, 1H), 4.22-4.10 (m, 4H), 3.92 (s, 1H), 3.77 (s, 3H), 3.49 (s, 3H).