3-Oxo-azetidine-1-carboxylic acid tert-butyl ester → HCID 67051632, compound

Participants

Reaction Steps

A solution of 2-methyl-1-({[2-(trimethylsilyl)ethyl]oxy}methyl)-1H-imidazole (0.5 g, 2.3 mmol) (prepared using procedures similar to those described in Clader et. al. J. of Med. Chem. 1995, 38(10), 1600-7) in tetrahydrofuran (5 mL) was cooled to −78° C., and n-butyllithium was added (2.5 M in hexanes, 0.990 mL, 2.5 mmol). After 2 hours, 1,1-dimethylethyl 3-oxoazetidine-1-carboxylate (0.60 g, 3.5 mmol), prepared using procedures similar to those described in Example 3, in 2.0 mL tetrahydrofuran was added and the solution was allowed to warm to room temperature and stirred overnight. The reaction mixture was quenched with an excess of saturated aqueous ammonium chloride solution and partitioned between water and ethyl acetate. The layers were separated and the aqueous layer was extracted with ethyl acetate (2×10 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo. Column chromatography (silica gel, 3:1 hexanes/ethyl acetate) gave 0.37 g (41%) of 3-{[1-({[2-(trimethylsilyl)ethyl]oxy}methyl)-1H-imidazol-2-yl]methyl}azetidin-3-ol: 1H NMR (400 MHz, CDCl3): 6.96-6.92 (m, 1H), 5.23 (s, 2H), 3.98 (d, 2H), 3.79 (d, 2H), 3.52-3.47 (m, 2H), 3.13 (s, 2H), 1.43 (s, 9H), 0.94-0.88 (m, 2H), 0.00 (s, 9H).

Provenance & Evidence