反应详情

Following the procedure as described in PREPARATION 2A and making non-critical variations using 2,3-dihydro-1,4-benzodioxin-6-ol to replace 3-bromophenol, and 4-bromo-1-benzhydrylindoline-2,3-dione to replace 1-((5-(trifluoromethyl)furan-2-yl)methyl)indoline-2,3-dione, 4-bromo-1-(diphenylmethyl)-3-hydroxy-3-(7-hydroxy-2,3-dihydro-1,4-benzodioxin-6-yl)-1,3-dihydro-2H-indol-2-one was obtained (99%) as a colorless solid: 1H NMR (300 MHz, DMSO-d6) δ9.06 (s, 1H), 7.44-7.28 (m, 10H), 6.98-6.82 (m, 2H), 6.68 (s, 1H), 6.33 (d, J=7.4 Hz, 1H), 6.16 (s, 1H), 4.23-4.08 (m, 4H); MS (ES+) m/z 566.1 (M+23), 568.1 (M+23).