反应详情

Using the same procedure for the preparation of compound 4A, reaction of compound 2A (2.17 g, 6.13 mmol) and N-Boc-2(S)-piperidinecarboxylic acid (3A) (5.63 g, 24.55 mmol) in the presence of DMAP (0.30 g, 2.46 mmol) and (DIPC, 3.80 mL, 24.54 mmol) in anhydrous THF (40 mL) provided the title compound (9A, 3.30 g) as a foam-like powder in 95.2% yield. The 1H NMR and LCMS data are exactly same with those of compound 4A.