Boron trifluoride etherate → HCID 86701300, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (2S,3S)-2,3-bis(benzyloxy)butane-1,4-diol (283 mg, 0.935 mmol), prepared as disclosed in Journal of Organic Chemistry 1991, 56(3), 1321-1322, and (S)-1-benzyl 2-methyl aziridine-1,2-dicarboxylate (110 mg, 0.468 mmol) in CH2Cl2 (1.5 mL) at −78° C. was added BF3-OEt2 (10 μL, 0.081 mmol), and the reaction mixture was stirred at −78° C. for 1 h, slowly warmed to 0° C., and then stirred at 0° C. for 3 h. The reaction mixture was directly purified by flash chromatography (SiO2) to afford the title compound as a colorless oil (208 mg, 83%): 1H NMR (400 MHz, CDCl3) δ 7.45-7.20 (m, 16H), 5.70 (d, J=8.5 Hz, 1H), 4.70-4.54 (m, 6H), 4.53-4.46 (m, 1H), 3.93 (dd, J=9.5, 3.2 Hz, 1H), 3.80-3.53 (m, 9H), 2.09-1.96 (m, 1H); 13C NMR (101 MHz, CDCl3) δ 170.72, 156.04, 138.16, 138.08, 136.24, 128.54, 128.49, 128.47, 128.20, 128.13, 127.99, 127.91, 127.89, 127.86, 79.03, 78.10, 73.09, 72.88, 71.40, 71.08, 67.08, 61.40, 54.46, 52.60; ESIMS m/z 538.4 ([M+H]+).

Provenance & Evidence