3-(Chloromethyl)-5-[4-(trifluoromethyl)phenyl]-1,2,4-oxadiazole → 1'-({5-[4-(trifluoromethyl)phenyl]-1,2,4-oxadiazol-3-yl}methyl)spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol]-2'(1'H)-one

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Following the procedure described in EXAMPLE 10.47, and making non-critical variations using spiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one to replace 4′-bromospiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one, and 3-chloromethyl-5-[4-(trifluoromethyl)phenyl]-1,2,4-oxadiazole to replace 2-(bromomethyl)-5-(trifluoromethyl)furan, the title compound was obtained (44%): 1H NMR (300 MHz, CDCl3) δ 8.22 (d, 2H), 7.76 (d, 2H), 7.30-7.18 (m, 2H), 7.06 (t, 1H), 6.91 (d, 1H), 6.51 (s, 1H), 6.40 (s, 1H), 5.88 (s, 2H), 5.17 (ABq, 2H), 4.86 (ABq, 2H); MS (ES+) m/z 508.1 (M+1).

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