反应详情

Following the procedure as described in EXAMPLE 12.49 and making non-critical variations using 7 N ammonia solution in methanol to replace 3,3-dimethylbutylamine, and 5-[(2′-oxospiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-1′(2′H)-yl)methyl]-2-(trifluoromethyl)furan-3-carboxylic acid to replace (2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)acetic acid, 5-[(2′-oxospiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-1′(2′H)-yl)methyl]-2-(trifluoromethyl)furan-3-carboxamide was obtained (86%) as a colorless solid: mp 172-174° C. (ethyl acetate/hexanes); 1H NMR (300 MHz, CDCl3) δ 7.32-7.27 (m, 1H), 7.20-7.17 (m, 1H), 7.11-7.06 (m, 1H), 6.97-6.94 (m, 1H), 6.70 (s, 1H), 6.49 (s, 1H), 6.09-6.02 (m, 3H), 5.83 (ABq, 2H), 5.85-5.84 (m, 2H), 5.03-4.85 (m, 3H), 4.67-4.64 (m, 1H); MS (ES+) m/z 473.2 (M+1).