3-(6-hydroxy-1,3-benzodioxol-5-yl)-3-(hydroxymethyl)-4-methoxy-1-{[5-(trifluoromethyl)-2-furyl]methyl}-1,3-dihydro-2H-indol-2-one → 4'-methoxy-1'{[5-(trifluoromethyl)-2-furyl]methyl}spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol]-2'(1'H)-one

Participants

Reaction Steps

Following the procedure described in EXAMPLE 1, and making non-critical variations using 3-(6-hydroxy-1,3-benzodioxol-5-yl)-3-(hydroxymethyl)-4-methoxy-1-{[5-(trifluoromethyl)-2-furyl]methyl}-1,3-dihydro-2H-indol-2-one to replace 1-(2-cyclopropylethyl)-3-(6-hydroxy-1,3-benzodioxol-5-yl)-3-(hydroxymethyl)-1,3-dihydro-2H-indol-2-one, the title compound was obtained (33%) as a white solid: mp 149-153° C.; 1H NMR (300 MHz, DMSO-d6) δ 7.32-7.24 (m, 1H), 6.82-6.62 (m, 3H), 6.46 (s, 1H), 6.40 (d, 1H), 6.08 (s, 1H), 5.87 (ABq, 2H), 4.92 (ABq, 2H), 4.82 (ABq, 2H), 3.70 (s, 3H); MS (ES+) m/z 460.3 (M+1).

Provenance & Evidence