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

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Reaction Steps

Following the procedure as described in PREPARATION 4C, and making non-critical variations using 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 to replace 4-chloro-1-(diphenylmethyl)-3-hydroxy-3-(6-hydroxy-2,3-dihydro-1-benzofuran-5-yl)-1,3-dihydro-2H-indol-2-one, 1-(diphenylmethyl)-3-(7-hydroxy-2,3-dihydro-1,4-benzodioxin-6-yl)-4,6-dimethoxy-1,3-dihydro-2H-indol-2-one was obtained (92%) as a colorless solid: 1H NMR (300 MHz, CDCl3) δ7.35-7.25 (m, 8H), 7.21-7.14 (m, 2H), 6.87 (s, 1H), 6.61 (s, 1H), 6.27 (s, 1H), 6.17 (d, J=1.8 Hz, 1H), 5.68 (d, J=1.8 Hz, 1H), 5.02 (s, 1H), 4.24-4.10 (m, 4H), 3.73 (s, 3H), 3.48 (s, 3H), 3.47 (s, 1H).

Provenance & Evidence