1-(2,5-Dichloropyrimidin-4-yl)-azetidine-3-carboxylic acid (66 mg, 0.27 mmol, 1 equivalent) was dissolved in DMF (1 mL) together with EDCI (103 mg, 0.53 mmol, 2 equivalents), HOBt (18 mg, 0.13 mmol, 0.5 equivalent) and (S)-(+)-3-chlorophenylglycinol (67.4 mg, 0.32 mmol, 1.2 equivalents). Triethylamine (121 mg, 0.32 mmol, 1.2 equivalents) was then added and the resulting mixture was stirred at room temperature for 1 hour then warmed to 90° C. for 10 minutes. The crude reaction mixture was diluted with ethyl acetate, washed with water, and the organic fraction dried over sodium sulfate. The resulting crude oil was purified by HPLC Gilson (acetonitrile/water/0.1% TFA), yielding the title compound as a white solid (44 mg, 41%). HPLC Rt=5.528 minutes.
