FIG 1.
General synthesis of N-acylated trans-aziridine-2,3-dicarboxylates. Reagents and conditions are as follows: i, PPA, ethyl acetate, or dimethylformamide, 1 h at 0°C and 24 h at room temperature (s1 to s37); and ii, PPA, triethylamine, or ethyl acetate, 1 h at 0°C, 4 h at 40°C, and 7 days at room temperature (s38).
