反应详情

To a solution of 1-(tert-butoxycarbonyl)azetidine-3-carboxylic acid (from Activate Scientific. 0.25 g, 1.2 mmol), ammonium acetate (0.14 g, 1.9 mmol) and N,N,N′,N′-tetramethyl-O-(7-azabenzotriazol-1-yl)uronium hexafluorophosphate (0.71 g, 1.9 mmol) in N,N-dimethylformamide (4 mL) was added N,N-diisopropylethylamine (0.43 mL, 2.5 mmol). The mixture was stirred at room temperature overnight. The mixture was diluted with MeOH and purified on prep-LCMS (XBridge C18 column, eluting with a gradient of acetonitrile/water containing 0.1% ammonium hydroxide, at flow rate of 60 mL/min) to give the desired product (0.156 g, 63%). LCMS calculated for C9H16N2O3Na (M+Na)+: m/z=223.1. Found: 223.0.

1. custompurified on prep-LCMS (XBridge C18 column
2. washeluting with a gradient of acetonitrile/water containing 0.1% ammonium hydroxide, at flow rate of 60 mL/min)