Diisopropylamine → HCID 75110103, compound

Participants

Reaction Steps

A stirred solution of 2-(4′-chloro-2′-oxo-6H-spiro[benzofuro[6,5-d][1,3]dioxole-7,3′-indoline]-1′-yl)-N′-hydroxyacetimidamide (0.40 g, 1.0 mmol), diisopropylamine (0.16 g, 1.6 mmol) and cyclopropane carbonyl chloride (0.16 g, 1.6 mmol) in dichloromethane (20 mL) was stirred for 16 h at ambient temperature. The colorless solid that precipitated from the solution was filtered, washed with water (5 mL) and diethyl ether (5 mL) to afford 2-(4′-chloro-2′-oxospiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-1′(2′H)-yl)-N′-[(cyclopropylcarbonyl)oxy]ethanimidamide (0.25 g, 53%) as a colorless solid: 1H NMR (300 MHz, DMSO-d6) δ 7.31 (dd, J=8.0, 8.0 Hz, 1H), 7.02 (d, J=8.0 Hz, 2H), 6.64 (br s, 2H), 6.54 (s, 1H), 6.47 (s, 1H), 5.88 (s, 2H), 4.77 (ABq, 2H), 4.43 (ABq, 2H), 1.75-1.67 (m, 1H), 0.86-0.73 (m, 4H); 13C NMR (75 MHz, DMSO-d6) δ 176.9, 171.9, 156.5, 153.6, 148.9, 144.8, 141.9, 130.8, 130.0, 128.6, 117.4, 108.8, 104.4, 101.8, 104.5, 101.8, 104.4, 101.8, 93.0, 77.5, 58.4, 11.7, 8.45, 8.42; MS (ES+) m/z 456.1 (M+1), 478.1 (M+23).

Provenance & Evidence