methyl 2-(1,2,3,4-tetrahydroquinolin-2-yl)acetate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 120 ml of ethanol, 6 g of methyl quinaldinate was reduced by hydrogen in the presence of 400 mg of platinum oxide to give 6.8 g of methyl 1,2,3,4-tetrahydroquinaldinate as an oil. 3.0 g of the resulting methylester was further reduced in a dry ether by 1 g of lithium aluminum hydride to give 2.6 g of 1,2,3,4-tetrahydro-2-quinolinemethanol. A mixture of 1.6 g of the resulting alcohol, 0.93 ml of dimethylsulfonic acid, 2.16 g of calcium carbonate and 8 ml of water was stirred at room temperature for 6 hours. To the reaction mixture was added ether and insolubles were removed by filtration. The organic portion was separated, washed with water and dried over anhydrous sodium sulfate. After removal of the solvent under reduced pressure, the organic portion was purified by silica gel column chromatography (eluent: chloroform) to give 1.4 g of 1-methyl-1,2,3,4-tetrahydro-2-quinolinemethanol as a pale yellow oil.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-methoxycarbonylmethyltetrahydroquinoline (31.5 g, 0.153 mol) in DMF (750 mL) was added dropwise a solution of N-bromosuccinimide (27.41 g, 0.154 mol) in DMF (550 mL) at 0° C. The mixture was stirred for 2 h at the same temperature, poured into water (2 L), and extracted with a mixture of toluene and ethyl acetate. The organic layer was washed with water, dried over magnesium sulfate, and concentrated to give 44.72 g of the title compound (quant). extracted with a mixture of toluene and ethyl acetate The organic layer was washed with water dried over magnesium sulfate concentrated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 120 ml of ethanol, 6 g of methyl quinaldinate was reduced by hydrogen in the presence of 400 mg of platinum oxide to give 6.8 g of methyl 1,2,3,4-tetrahydroquinaldinate as an oil. 3.0 g of the resulting methylester was further reduced in a dry ether by 1 g of lithium aluminum hydride to give 2.6 g of 1,2,3,4-tetrahydro-2-quinolinemethanol. A mixture of 1.6 g of the resulting alcohol, 0.93 ml of dimethylsulfonic acid, 2.16 g of calcium carbonate and 8 ml of water was stirred at room temperature for 6 hours. To the reaction mixture was added ether and insolubles were removed by filtration. The organic portion was separated, washed with water and dried over anhydrous sodium sulfate. After removal of the solvent under reduced pressure, the organic portion was purified by silica gel column chromatography (eluent: chloroform) to give 1.4 g of 1-methyl-1,2,3,4-tetrahydro-2-quinolinemethanol as a pale yellow oil.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 120 ml of ethanol, 6 g of methyl quinaldinate was reduced by hydrogen in the presence of 400 mg of platinum oxide to give 6.8 g of methyl 1,2,3,4-tetrahydroquinaldinate as an oil. 3.0 g of the resulting methylester was further reduced in a dry ether by 1 g of lithium aluminum hydride to give 2.6 g of 1,2,3,4-tetrahydro-2-quinolinemethanol. A mixture of 1.6 g of the resulting alcohol, 0.93 ml of dimethylsulfonic acid, 2.16 g of calcium carbonate and 8 ml of water was stirred at room temperature for 6 hours. To the reaction mixture was added ether and insolubles were removed by filtration. The organic portion was separated, washed with water and dried over anhydrous sodium sulfate. After removal of the solvent under reduced pressure, the organic portion was purified by silica gel column chromatography (eluent: chloroform) to give 1.4 g of 1-methyl-1,2,3,4-tetrahydro-2-quinolinemethanol as a pale yellow oil.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-methoxycarbonylmethyltetrahydroquinoline (31.5 g, 0.153 mol) in DMF (750 mL) was added dropwise a solution of N-bromosuccinimide (27.41 g, 0.154 mol) in DMF (550 mL) at 0° C. The mixture was stirred for 2 h at the same temperature, poured into water (2 L), and extracted with a mixture of toluene and ethyl acetate. The organic layer was washed with water, dried over magnesium sulfate, and concentrated to give 44.72 g of the title compound (quant). extracted with a mixture of toluene and ethyl acetate The organic layer was washed with water dried over magnesium sulfate concentrated