Potassium Carbonate → HCID 54526078, compound

Participants

Reaction Steps

(RS)-2-Chloroacetyltetrahydrofuran (2.46 g, 16.5 mmol), (3R,4R)-4-mercapto-3-phenoxyacetamidoazetidin-2-one (4.157 g, 16.5 mmol) and potassium carbonate (2.227 g, 16.5 mmol) in DMF (10 ml) were stirred for 2 h, diluted with ethyl acetate, washed twice with water and with brine, dried concentrated and flash chromatographed eluting with 40,30,20,10 and 0% hexane in ethyl acetate to give the title compound as a foam (3.547 g, 59%); νmax (CH2Cl2) 3405, 1785, 1693, 1520, 1496 and 1240 cm-1 ; δ(CDCl3, 250 MHz) 1.9-2.3 (4H, m), 3.42 and 3.62, 3.46 and 3.56 (together 2H, 2 ABq, J15.8 Hz, 15.4 Hz), 3.85-4.0 (2H, m), 4.4-4.5 (1H, m), 4.58 (2H, s), 5.01, 5.04 (together 1H, 2d, J4.7 Hz), 5.59 (1H, dd, J 8.8, 4.5 Hz) 6.62, 6.68 (together 1H, 2s), 6.9-7.4 (5H, m) and 7.45, 7.47 (together 1H, 2d, J8.8 Hz). [Mass spectrum: M+ (364)].

Provenance & Evidence