BENZYL 2-FORMYL-2-METHYLPROPANOATE

反应条件: temp:0.00; pressure:0.00; stir:

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

实验步骤: To a solution of benzyl-2,2-dimethyl-3-oxopropanoate (200 mg, 1.0 mmol) in DCM (30 mL) were added piperidine (0.10 mL, 1.1 mmol) and sodium triacetoxyborohydride (400 mg, 2.0 mmol). The reaction mixture was left to stir at rt for 16 h. The mixture was partitioned between DCM and water and treated with saturated NaHCO3. The combined organic extracts were dried over Na2SO4 and concentrated in vacuo. Purification via silica gel chromatography (5% EtOAc in Hexane) afforded the title compound as a yellow oil. MS (ES+): m/z: 276.18 (100) [MH+]. HPLC: tr=1.97 min (ZQ2000: polar—5 min). 1H NMR (400 MHz, CDCl3): δ=1.17 (s, 6H), 1.28-1.37 (m, 2H), 1.40-1.46 (m, 4H), 2.34-2.36 (m, 4H), 2.44 (s, 2H), 5.09 (s, 2H), 7.25-7.34 (m, 5H). The reaction mixture was left The mixture was partitioned between DCM and water treated with saturated NaHCO3 The combined organic extracts were dried over Na2SO4 concentrated in vacuo Purification via silica gel chromatography (5% EtOAc in Hexane)

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

实验步骤: To a solution of benzyl-2,2-dimethyl-3-oxopropanoate (200 mg, 1.0 mmol) in DCM (30 mL) were added piperidine (0.10 mL, 1.1 mmol) and sodium triacetoxyborohydride (400 mg, 2.0 mmol). The reaction mixture was left to stir at rt for 16 h. The mixture was partitioned between DCM and water and treated with saturated NaHCO3. The combined organic extracts were dried over Na2SO4 and concentrated in vacuo. Purification via silica gel chromatography (5% EtOAc in Hexane) afforded the title compound as a yellow oil. MS (ES+): m/z: 276.18 (100) [MH+]. HPLC: tr=1.97 min (ZQ2000: polar—5 min). 1H NMR (400 MHz, CDCl3): δ=1.17 (s, 6H), 1.28-1.37 (m, 2H), 1.40-1.46 (m, 4H), 2.34-2.36 (m, 4H), 2.44 (s, 2H), 5.09 (s, 2H), 7.25-7.34 (m, 5H). The reaction mixture was left The mixture was partitioned between DCM and water treated with saturated NaHCO3 The combined organic extracts were dried over Na2SO4 concentrated in vacuo Purification via silica gel chromatography (5% EtOAc in Hexane)

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

实验步骤: To a solution of benzyl-2,2-dimethyl-3-oxopropanoate (200 mg, 1.0 mmol) in DCM (30 mL) were added piperidine (0.10 mL, 1.1 mmol) and sodium triacetoxyborohydride (400 mg, 2.0 mmol). The reaction mixture was left to stir at rt for 16 h. The mixture was partitioned between DCM and water and treated with saturated NaHCO3. The combined organic extracts were dried over Na2SO4 and concentrated in vacuo. Purification via silica gel chromatography (5% EtOAc in Hexane) afforded the title compound as a yellow oil. MS (ES+): m/z: 276.18 (100) [MH+]. HPLC: tr=1.97 min (ZQ2000: polar—5 min). 1H NMR (400 MHz, CDCl3): δ=1.17 (s, 6H), 1.28-1.37 (m, 2H), 1.40-1.46 (m, 4H), 2.34-2.36 (m, 4H), 2.44 (s, 2H), 5.09 (s, 2H), 7.25-7.34 (m, 5H). The reaction mixture was left The mixture was partitioned between DCM and water treated with saturated NaHCO3 The combined organic extracts were dried over Na2SO4 concentrated in vacuo Purification via silica gel chromatography (5% EtOAc in Hexane)