3-(7-chloro-6-hydroxy-2,3-dihydro-1,4-benzodioxin-5-yl)-1-(diphenylmethyl)-3-hydroxy-1,3-dihydro-2H-indol-2-one → 3-(7-chloro-6-hydroxy-2,3-dihydro-1,4-benzodioxin-5-yl)-1-(diphenylmethyl)-1,3-dihydro-2H-indol-2-one

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Reaction Steps

Following the procedure as described in PREPARATION 2B, and making non-critical variations using 3-(7-chloro-6-hydroxy-2,3-dihydro-1,4-benzodioxin-5-yl)-1-(diphenylmethyl)-3-hydroxy-1,3-dihydro-2H-indol-2-one to replace 3-(4-bromo-2-hydroxyphenyl)-3-hydroxy-1-{[5-(trifluoromethyl)furan-2-yl]methyl}-1,3-dihydro-2H-indol-2-one, 3-(7-chloro-6-hydroxy-2,3-dihydro-1,4-benzodioxin-5-yl)-1-(diphenylmethyl)-1,3-dihydro-2H-indol-2-one was obtained (74%) as a colorless solid: 1H NMR (300 MHz, CDCl3) δ7.44-7.27 (m, 10H), 7.08-6.78 (m, 4H), 6.49-6.42 (m, 1H), 5.76 (s, 0.5H), 5.30 (s, 0.5H), 5.27 (s, 0.5H), 5.03 (s, 0.5H), 4.39-4.25 (m, 2H), 4.06-3.90 (m, 1H), 3.75-3.50 (m, 1H); MS (ES+) m/z 484.3 (M+1), 486.3 (M+1).

Provenance & Evidence