[4-(benzyloxy)-2-hydroxyphenyl]-1-(diphenylmethyl)-3-hydroxy-1,3-dihydro-2H-indol-2-one → 3-[4-(benzyloxy)-2-hydroxyphenyl]-1-(diphenylmethyl)-1,3-dihydro-2H-indol-2-one

Participants

Reaction Steps

Following the procedure as described in PREPARATION 4C, and making non-critical variations using [4-(benzyloxy)-2-hydroxyphenyl]-1-(diphenylmethyl)-3-hydroxy-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, 3-[4-(benzyloxy)-2-hydroxyphenyl]-1-(diphenylmethyl)-1,3-dihydro-2H-indol-2-one was obtained (57%) as a colorless solid: 1H NMR (300 MHz, CDCl3) δ9.01 (s, 1H), 7.45-7.16 (m, 15H), 7.13-7.01 (m, 2H), 6.96 (s, 1H), 6.85-6.76 (m, 1H), 6.71-6.65 (m, 1H), 6.55-6.49 (m, 1H), 6.49-6.42 (m, 1H), 5.10 (s, 1H), 4.99 (s, 2H).

Provenance & Evidence