(S)-1-苯基乙基羟基胺

反应条件: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of Example 2B (1.5 g, 10.95 mmol) in tetrahydrofuran (15 mL, 10 vols) was treated with the 2,2,2-trifluoroethyl formate reagent (92% wt, 7.6 g, 54.7 mmol, 5 equiv). The resulting mixture was heated at 65° C. for 18 hours and concentrated. The concentrate was distilled under vacuum (170° C. at 1.6 mm Hg) to provide 1.6 g (89%) of the desired product. 1H NMR (300 MHz, CDCl3) δ 8.00 (s, 1H), 7.54-7.30 (m, 5H), 4.93 (q, 1H, J=7 Hz), 1.82 (d, 3H, J=7 Hz). concentrated The concentrate was distilled under vacuum (170° C. at 1.6 mm Hg)

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A −78° C. solution of Example 2A (7.15 g, 30 mmole) in tetrahydrofuran (75 mL) was treated with a solution of 3-chloroperoxybenzoic acid (15 g, 60 mmol), warmed to 0 ° C., stirred for 2 hours, diluted with ethyl acetate (100 mL), washed sequentially with 10% (w/w) sodium thiosulfate, saturated sodium bicarbonate, and brine, dried (MgSO4), filtered, and concentrated. The concentrate was dissolved in tetrahydrofuran (100 mL), treated with p-toluene sulfonic acid monohydrate (8.15 g, 42.8 mmol), stirred for 2 hours, treated with a solution of N-hydroxylamine hydrochloride (8.7 g) in water (15 mL), and stirred for 16 hours. The mixture was diluted with ethyl acetate (100 mL), washed with saturated sodium bicarbonate and brine, dried (MgSO4), filtered, and concentrated. The concentrate was purified by flash column chromatography on silica gel with 1:2 ethyl acetate/hexanes to provide 3.53g (86% yield) of the desired product. 1H NMR (300 MHz, CDCl3) δ 7.36-7.20 (m, 5H), 4.09 (q, 1H, J=6.6 Hz), 1.48 (d, 3H, J=6.6 Hz). washed sequentially with 10% (w/w) sodium thiosulfate, saturated sodium bicarbonate, and brine dried (MgSO4) filtered concentrated The concentrate was dissolved in tetrahydrofuran (100 mL) stirred for 2 hours stirred for 16 hours washed with saturated sodium bicarbonate and brine dried (MgSO4) filtered concentrated The concentrate was purified by flash column chromatography on silica gel with 1:2 ethyl acetate/hexanes