(2S)-2-氨基-1-(3,3-二氟吡咯烷-1-基)-3-甲基丁-1-one

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 1M solution of LAH in THF (9.89 mL, 9.89 mmol) was (S)-2-amino-1-(3,3-difluoropyrrolidin-1-yl)-3-methylbutan-1-one (1.02 g, 4.95 mmol) dropwise added (over approximately 60 min) as a solution in THF under a nitrogen atmosphere. The mixture was stirred at rt for 30 min and heated at 70° C. over night. The reaction was cooled to 0° C. Water (0.5 mL) was slowly added, followed by 15% aq. NaOH (0.5 mL), THF (10 mL) and additional water (2 mL). The reaction mixture was warmed to rt and stirred for 1 h. The mixture was filtered and the solid washed with THF. The filtrate was dried (Na2SO4) and concentrated under reduced pressure to give the title compound (0.67 g, 70.6%). The obtained crude product was used without further purification. 1H NMR (400 MHz, CH3OD) δ 0.87-0.99, 1.52-1.65, 2.12-2.48, 2.59-2.87, 2.92-3.07, 3.31-3.67. heated at 70° C. over night The reaction was cooled to 0° C The reaction mixture was warmed to rt stirred for 1 h The mixture was filtered the solid washed with THF The filtrate was dried (Na2SO4) concentrated under reduced pressure