3,4-Dimethylphenol → 3-hydroxy-3-(6-hydroxy-3-methyl-1,2-benzisoxazol-5-yl)-1-(4-methoxybenzyl)-1,3-dihydro-2H-indol-2-one

Participants

Reaction Steps

Following the procedure as described in PREPARATION 6A, and making non-critical variations using 3-methylbenzo[d]isoxazol-6-ol (Iranpoor, N., et al., Tetrahedron Lett. (2006), 47:8247) to replace 3,4-dimethylphenol, and 1-(4-methoxybenzyl)-1H-indole-2,3-dione to replace 1-(diphenylmethyl)-1H-indole-2,3-dione, 3-hydroxy-3-(6-hydroxy-3-methyl-1,2-benzisoxazol-5-yl)-1-(4-methoxybenzyl)-1,3-dihydro-2H-indol-2-one was obtained (76%): mp 199-201° C. (ethyl acetate); 1H NMR (300 MHz, DMSO-d6) δ 7.52 (d, J=9.0 Hz, 1H), 7.37 (d, J=9.0 Hz, 2H), 7.18-7.13 (m, 1H), 7.05-7.03 (m, 1H), 6.89-6.75 (m, 5H), 4.83 (AB, 2H), 3.71 (s, 3H), 2.77 (s, 3H); MS (ES+) m/z 417.0 (M+1).

Provenance & Evidence