Ethanol → HCID 69348337, compound

Reaction equation

[N@:1]1([C:8]([O:10][CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[O:9])[CH2:3][CH:2]1[C:4]([O:6][CH3:7])=[O:5].B(F)(F)F.[CH3:22][CH2:23][O:24]CC.C(O)C>ClCCl>[CH2:11]([O:10][C:8]([NH:1][C@H:2]([C:4]([O:6][CH3:7])=[O:5])[CH2:3][O:24][CH2:23][CH3:22])=[O:9])[C:12]1[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=1

Participants

Procedure

To a stirred solution of (S)-1-benzyl 2-methyl aziridine-1,2-dicarboxylate (prepared according to the literature procedure: Org. Biomol. Chem., 2005, 3, 3357, 2.7 g, 11.4 mmol) in dichloromethane (30 mL), boron trifluoride etherate (0.01 mL, 0.11 mmol) was added at 0° C. followed by absolute ethanol (1.05 g, 22.9 mmol). The reaction mixture was stirred at room temperature for an hour, after which the solution was quenched with saturated bicarbonate solution (2 mL), extracted with dichloromethane (3×25 mL), organic layers were washed with water (25 mL), brine solution (25 mL) and dried over sodium sulfate. The removal of solvents afforded crude product, which was purified by silica gel column chromatography using a gradient of ethyl acetate in pet. ether. Yield: 2.0 g (63%). 1H NMR (400 MHz, DMSO-d6) δ: 1.08 (t, 3H), 3.38-3.46 (m, 2H), 3.57-3.63 (m, 2H), 3.70 (s, 3H), 4.26-4.31 (m, 1H), 5.04 (s, 2H), 7.30-7.39 (m, 5H), 7.73 (d, 1H).