反应详情

Following the procedure as described in EXAMPLE 4 and making non-critical variations using 2-(chloromethyl)-5-fluoropyridine hydrochloride (Cai, Z. et al. US 2007/0072831) to replace 2-(bromomethyl)tetrahydro-2H-pyran, and 2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one to replace 5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2″(1′H)-one, 1′-[(5-fluoropyridin-2-yl)methyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one was obtained (99%) as a colorless solid: mp 174-176° C.; 1H NMR (300 MHz, CDCl3) δ 8.40 (d, J=2.7 Hz, 1H), 7.41-7.11 (m, 4H), 7.01 (t, J=7.4 Hz, 1H), 6.89 (d, J=7.8 Hz, 1H), 6.48 (s, 1H), 6.25 (s, 1H), 5.16 (d, J=15.7 Hz, 1H), 4.98-4.88 (m, 2H), 4.65 (d, J=8.9 Hz, 1H), 4.20-4.07 (m, 4H); 13C NMR (75 MHz, CDCl3) δ 177.5, 160.2, 157.2, 155.3, 151.5, 151.5, 144.7, 142.0, 138.3, 137.8, 137.5, 132.2, 128.8, 124.1, 123.9, 123.8, 123.6, 122.9, 122.8, 121.0, 111.6, 109.4, 99.4, 80.1, 64.5, 63.9, 58.1, 45.4; MS (ES+) m/z 404.9 (M+1).