1-(Bromomethyl)-2-(trifluoromethyl)benzene → 6-Fluoro-2'-oxo-1'-[2-(trifluoromethyl)benzyl]-1',2'-dihydrospiro[1-benzofuran-3,3-indole]-5-carbonitrile

Participants

Reaction Steps

Following the procedure as described in EXAMPLE 9 and making non-critical variations using 2-(trifluoromethyl)benzyl bromide to replace 2-(bromomethyl)-5-(trifluoromethyl)furan, and 6-fluoro-2′-oxo-1′,2′-dihydrospiro[1-benzofuran-3,3′-indole]-5-carbonitrile to replace 3-methylspiro[furo[3,2-f][1,2]benzisoxazole-5,3′-indol]-2′(1′H)-one, 6-fluoro-2′-oxo-1′-[2-(trifluoromethyl)benzyl]-1′,2′-dihydrospiro[1-benzofuran-3,3′-indole]-5-carbonitrile was obtained (55%): mp 193-195° C. (ethyl acetate/hexanes); 1H NMR (300 MHz, CDCl3) δ 7.76-7.73 (m, 1H), 7.53-7.39 (m, 2H), 7.27-7.22 (m, 1H), 7.17-7.07 (m, 3H), 7.01-6.99 (m, 1H), 6.82-6.79 (m, 1H), 6.70-6.67 (m, 1H), 5.27-5.09 (m, 3H), 4.90-4.87 (m, 1H); MS (ES+) m/z 419.0 (M−19).

Provenance & Evidence