反应详情

Following the procedure as described in EXAMPLE 4 and making non-critical variations using 2-(bromomethyl)pyridine to replace 2-(bromomethyl)tetrahydro-2H-pyran, and 6-chloro-2,3-dihydrospiro[furo[3,2-f][1,4]benzodioxine-9,3′-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, 6-chloro-1′-(pyridin-2-ylmethyl)-2,3-dihydrospiro[furo[3,2-f][1,4]benzodioxine-9,3′-indol]-2′(1′H)-one was obtained (81%) as a colorless solid: mp 197-199° C.; 1H NMR (300 MHz, CDCl3) δ8.60 (d, J=2.1 Hz, 1H), 7.60 (ddd, J=7.5, 7.5, 1.5 Hz, 1H), 7.32 (d, J=7.5 Hz, 1H), 7.25-7.15 (m, 3H), 7.02 (dd, J=7.5, 7.5 Hz, 1H), 6.83 (d, J=7.5 Hz, 1H), 6.79 (s, 1H), 5.35 (d, J=16.2 Hz, 1H), 5.00 (d, J=9.3 Hz, 1H), 4.89 (d, J=16.2 Hz, 1H), 4.74 (d, J=9.0 Hz, 1H), 4.16-3.86 (m, 4H); 13C NMR (75 MHz, CDCl3) δ175.9, 155.8, 151.7, 149.5, 141.8, 138.6, 138.3, 136.7, 130.9, 128.9, 123.6, 123.4, 122.6, 121.4, 118.2, 116.8, 109.4, 106.8, 81.7, 64.5, 63.8, 57.7, 46.3; MS (ES+) m/z 421.2 (M+1), 423.2 (M+1).