甲基 5-硝基戊酸甲酯

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

实验步骤: Add 1,4-phenylenediisocyanate (19.22 g, 120.0 mmol) to a stirred solution of 1-ethynyl-2-methoxy-benzene (2204901, 5.29 g, 40.0 mmol) and 5-nitro-pentanoic acid methyl ester (7.91 g, 49.1 mmol) in toluene (300 mL, anhydrous) and stir under N2. Add triethylamine (16.7 mL, 120.0 mmol) and heat to reflux under N2 overnight. Filter mixture through a pad of Celite® and rinse with toluene. Concentrate to get 12.4 g yellow oil. Adsorb on SiO2 and purify the residue by flash chromatography on silica gel eluting with 0-30% EtOAc/hexanes to afford the title compound (14.0 g, 74%). MS (IS) 276 (M+1)+. to reflux under N2 overnight Filter mixture through a pad of Celite® rinse with toluene Concentrate

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

实验步骤: Add 1,4-phenylenediisocyanate (19.22 g, 120.0 mmol) to a stirred solution of 1-ethynyl-2-methoxy-benzene (2204901, 5.29 g, 40.0 mmol) and 5-nitro-pentanoic acid methyl ester (7.91 g, 49.1 mmol) in toluene (300 mL, anhydrous) and stir under N2. Add triethylamine (16.7 mL, 120.0 mmol) and heat to reflux under N2 overnight. Filter mixture through a pad of Celite® and rinse with toluene. Concentrate to get 12.4 g yellow oil. Adsorb on SiO2 and purify the residue by flash chromatography on silica gel eluting with 0-30% EtOAc/hexanes to afford the title compound (14.0 g, 74%). MS (IS) 276 (M+1)+. to reflux under N2 overnight Filter mixture through a pad of Celite® rinse with toluene Concentrate

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

实验步骤: Add 1,4-phenylenediisocyanate (19.22 g, 120.0 mmol) to a stirred solution of 1-ethynyl-2-methoxy-benzene (2204901, 5.29 g, 40.0 mmol) and 5-nitro-pentanoic acid methyl ester (7.91 g, 49.1 mmol) in toluene (300 mL, anhydrous) and stir under N2. Add triethylamine (16.7 mL, 120.0 mmol) and heat to reflux under N2 overnight. Filter mixture through a pad of Celite® and rinse with toluene. Concentrate to get 12.4 g yellow oil. Adsorb on SiO2 and purify the residue by flash chromatography on silica gel eluting with 0-30% EtOAc/hexanes to afford the title compound (14.0 g, 74%). MS (IS) 276 (M+1)+. to reflux under N2 overnight Filter mixture through a pad of Celite® rinse with toluene Concentrate

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

实验步骤: Add 1,4-phenylenediisocyanate (19.22 g, 120.0 mmol) to a stirred solution of 1-ethynyl-2-methoxy-benzene (2204901, 5.29 g, 40.0 mmol) and 5-nitro-pentanoic acid methyl ester (7.91 g, 49.1 mmol) in toluene (300 mL, anhydrous) and stir under N2. Add triethylamine (16.7 mL, 120.0 mmol) and heat to reflux under N2 overnight. Filter mixture through a pad of Celite® and rinse with toluene. Concentrate to get 12.4 g yellow oil. Adsorb on SiO2 and purify the residue by flash chromatography on silica gel eluting with 0-30% EtOAc/hexanes to afford the title compound (14.0 g, 74%). MS (IS) 276 (M+1)+. to reflux under N2 overnight Filter mixture through a pad of Celite® rinse with toluene Concentrate

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

实验步骤: Add 1,4-phenylenediisocyanate (19.22 g, 120.0 mmol) to a stirred solution of 1-ethynyl-2-methoxy-benzene (2204901, 5.29 g, 40.0 mmol) and 5-nitro-pentanoic acid methyl ester (7.91 g, 49.1 mmol) in toluene (300 mL, anhydrous) and stir under N2. Add triethylamine (16.7 mL, 120.0 mmol) and heat to reflux under N2 overnight. Filter mixture through a pad of Celite® and rinse with toluene. Concentrate to get 12.4 g yellow oil. Adsorb on SiO2 and purify the residue by flash chromatography on silica gel eluting with 0-30% EtOAc/hexanes to afford the title compound (14.0 g, 74%). MS (IS) 276 (M+1)+. to reflux under N2 overnight Filter mixture through a pad of Celite® rinse with toluene Concentrate