反应详情

Following the procedure as described in EXAMPLE 2 and making non-critical variations using 8-(6-hydroxy-2,3-dihydrobenzofuran-5-yl)-6-((5-(trifluoromethyl)furan-2-yl)methyl)-6,8-dihydro-2H-[1,4]dioxino[2,3-f]indol-7(3H)-one to replace 1-(diphenylmethyl)-3-(2-hydroxy-4-methoxy-5-methylphenyl)-1,3-dihydro-2H-indol-2-one, 6-((5-(trifluoromethyl)furan-2-yl)methyl)-2,3,5′,6′-tetrahydro-2′H-spiro[[1,4]dioxino[2,3-f]indole-8,3′-benzofuro[6,5-b]furan]-7(6H)-one was obtained (42%) as a colorless solid: mp 189-191° C.; 1H NMR (300 MHz, CDCl3) δ6.77-6.73 (m, 1H), 6.72 (s, 1H), 6.52-6.45 (m, 2H), 6.43-6.36 (m, 2H), 4.91 (ABq, 2H), 4.77 (ABq, 2H), 4.53 (t, J=8.6 Hz, 2H), 4.27-4.14 (m, 4H), 3.10-2.90 (m, 2H); 13C NMR (75 MHz, CDCl3) δ177.6, 161.8, 161.0, 151.9, 143.9, 140.1, 135.2, 124.9, 120.2, 120.0, 118.8, 113.6, 112.6 (d, J=2.8 Hz, 1C), 109.2, 98.8, 93.1, 80.4, 72.4, 64.6, 64.0, 57.5, 37.0, 28.9; MS (ES+) m/z 485.9 (M+1).