HCID 59352106, compound → Spiro[furo[2,3-g]-1,4-benzodioxin-8(7H),3'-[3H]indol]-2'(1'H)-one, 2,3-dihydro

Participants

Reaction Steps

Following the procedure as described in EXAMPLE 3 and making non-critical variations using 1′-(diphenylmethyl)-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one to replace 1′-(diphenylmethyl)-6-methoxy-5-methylspiro[1-benzofuran-3,3′-indol]-2′(1′H)-one, 2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one was obtained (89%) as a colorless solid: mp>250° C. (diethyl ether); 1H NMR (300 MHz, DMSO-d6) δ10.57 (s, 1H), 7.24 (ddd, J=7.7, 7.7, 1.0 Hz, 1H), 7.09 (d, J=6.9 Hz, 1H), 6.96 (dd, J=7.5, 7.5 Hz, 1H), 6.91 (d, J=7.8 Hz, 1H), 6.49 (s, 1H), 6.16 (s, 1H), 4.73 (d, J=9.2 Hz, 1H), 4.60 (d, J=9.2 Hz, 1H), 4.20-4.15 (m, 2H), 4.13-4.08 (m, 2H); 13C NMR (75 MHz, DMSO-d6) δ178.3, 154.6, 144.0, 141.7, 137.7, 132.5, 128.7, 123.7, 122.2, 121.4, 111.1, 109.8, 98.6, 79.4, 64.2, 63.6, 57.6; MS (ES+) m/z 296.3 (M+1).

Provenance & Evidence