HCID 59352564, compound → HCID 46194440, compound

Participants

Reaction Steps

A solution of 1′-{[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]methyl}-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one (0.66 g, 1.61 mmol) in glacial acetic acid (10 mL) and water (5 mL) was stirred at ambient temperature for 18 h and concentrated in vacuo. The residue was recrystallized from ethyl acetate to afford 1′-[(2S)-2,3-dihydroxypropyl]-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one (0.59 g, 99%): mp 179-181° C. (ethyl acetate/hexane); 1H NMR (300 MHz, DMSO-d6) δ 7.30-7.25 (m, 1H), 7.13-7.07 (m, 2H), 7.01-6.95 (m, 1H), 6.46 (s, 1H), 6.21-6.19 (m, 1H), 5.02-4.94 (m, 1H), 4.71-4.57 (m, 3H), 4.14-4.06 (m, 4H), 3.81-3.54 (m, 3H), 3.39-3.32 (m, 2H); MS (ES+) m/z 369.9 (M+1).

Provenance & Evidence