4-乙氧基苯甲醛

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

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: This compound was synthesized from 5-carboxypentyltriphenylphosphonium bromide (9.50 g, 20 mmol) and p-ethoxybenzaldehyde (3.00 g, 20 mmol) in THF (100 mL) by a Wittig reaction. Crystallization (hexanes-ethyl acetate) afforded the product (3.18 g, 64%) as white crystals (mp 62-63° C.), IR: 3450-2500, 1720 cm-1 ; 1H-NMR: 1.40 (t, 3H), 1.50 (m, 2H), 1.70 (m, 2H), 2.38 (m, 4H), 4.00 (q, 2H), 5.72+6.05 (m, 1H), 6.32 (t, 1H), 7.05 (q, 4H), 10.10 (bs, 1H). Anal. Calcd. for C15H20O3 : C, 72.55, H, 8.12% Found: C, 72.53, H, 8.15%. Z:E=45:55. Crystallization (hexanes-ethyl acetate)

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Sodium cyanoborohydride (140 mmol) in methanol (0.4 mL) was added to a mixture of 4-[(N-(2-amino-5-chlorobenzoyl)glycyl)aminomethyl]piperidine (0.10 mmol), 4-ethoxybenzaldehyde (0.10 mmol), acetic acid (0.050 mL), and methanol (1.6 mL). The reaction mixture was stirred at 60° C. for 14 h. The reaction mixture was loaded onto Varian™ SCX column and washed with CH3OH (20 mL). Product was eluted using 2 N NH3 in CH3OH (6 mL) and concentrated. Preparative TLC (SiO2, AcOEt/CH3OH 5:1) afforded 4-[{N-(2-amino-5-chlorobenzoyl)glycyl}aminomethyl]-1-(4-ethoxybenzyl)piperidine (Compound No. 1429) and 1-(4-ethoxybenzyl)-4-[{N-(2-(4-ethoxybenzyl)amino-5-chlorobenzoyl)glycyl)aminomethyl]piperidine (Compound No. 1433). washed with CH3OH (20 mL) Product was eluted concentrated

反应条件: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Sodium cyanoborohydride (140 mmol) in methanol (0.4 mL) was added to a mixture of 4-[(N-(2-amino-5-chlorobenzoyl)glycyl)aminomethyl]piperidine (0.10 mmol), 4-ethoxybenzaldehyde (0.10 mmol), acetic acid (0.050 mL), and methanol (1.6 mL). The reaction mixture was stirred at 60° C. for 14 h. The reaction mixture was loaded onto Varian™ SCX column and washed with CH3OH (20 mL). Product was eluted using 2 N NH3 in CH3OH (6 mL) and concentrated. Preparative TLC (SiO2, AcOEt/CH3OH 5:1) afforded 4-[{N-(2-amino-5-chlorobenzoyl)glycyl}aminomethyl]-1-(4-ethoxybenzyl)piperidine (Compound No. 1429) and 1-(4-ethoxybenzyl)-4-[{N-(2-(4-ethoxybenzyl)amino-5-chlorobenzoyl)glycyl)aminomethyl]piperidine (Compound No. 1433). washed with CH3OH (20 mL) Product was eluted concentrated