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Following the general procedure for the synthesis of acyloxyalkyl carbamates, D-serine (252 mg, 2.4 mmol) and (2,5-dioxoazolidinyloxycarbonyloxy)ethyl cyclohexanecarboxylate (626 mg, 2.0 mmol) were reacted to provide 350 mg (58% yield) of the title compound (27) as a white powder after work-up and mass-guided preparative HPLC purification. 1H NMR (CDCl3, 400 MHz): δ=6.79 (m, 1H), 6.05 (t, 1H), 5.45 (br s, 1H), 4.41 (m, 1H), 4.04 (m, 1H), 3.92 (m, 1H), 2.30 (m, 1H), 1.09-1.95 (m, 13H). MS (ESI) m/z 321.13 (M+NH4)+; 326.09 (M+Na)+; 302.06 (M−H)−.

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