diethyl pentanedioate

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

Procedure: 2.0 g of diethyl glutarate and 1.1 g of benzaldehyde were dissolved in 30 ml of tetrahydrofuran, and 8.5 ml of a 1.5M lithium diisopropylamide cyclohexane solution was dropwise added thereto at -78° C. under a nitrogen atmosphere, followed by stirring at the same temperature for 1.5 hours. A saturated ammonium chloride aqueous solution was added to the reaction solution, and the mixture was extracted with ethyl acetate. Then, the organic layer was washed with a saturated sodium chloride aqueous solution and dried over anhydrous magnesium sulfate. The drying agent was filtered off, and then, the solvent was distilled off under reduced pressure. The residue was purified by medium pressure liquid chromatography (Lobar column™, size C, Lichroprep™Si60, manufactured by Merck Co.; hexane/ethyl acetate=3/1) to obtain 1.56 g of the above-identified compound as colorless oily substance. at -78° C. the mixture was extracted with ethyl acetate Then, the organic layer was washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate The drying agent was filtered off the solvent was distilled off under reduced pressure The residue was purified by medium pressure liquid chromatography (Lobar column™, size C, Lichroprep™Si60, manufactured by Merck Co.; hexane/ethyl acetate=3/1)

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

Procedure: 2.0 g of diethyl glutarate and 1.1 g of benzaldehyde were dissolved in 30 ml of tetrahydrofuran, and 8.5 ml of a 1.5M lithium diisopropylamide cyclohexane solution was dropwise added thereto at -78° C. under a nitrogen atmosphere, followed by stirring at the same temperature for 1.5 hours. A saturated ammonium chloride aqueous solution was added to the reaction solution, and the mixture was extracted with ethyl acetate. Then, the organic layer was washed with a saturated sodium chloride aqueous solution and dried over anhydrous magnesium sulfate. The drying agent was filtered off, and then, the solvent was distilled off under reduced pressure. The residue was purified by medium pressure liquid chromatography (Lobar column™, size C, Lichroprep™Si60, manufactured by Merck Co.; hexane/ethyl acetate=3/1) to obtain 1.56 g of the above-identified compound as colorless oily substance. at -78° C. the mixture was extracted with ethyl acetate Then, the organic layer was washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate The drying agent was filtered off the solvent was distilled off under reduced pressure The residue was purified by medium pressure liquid chromatography (Lobar column™, size C, Lichroprep™Si60, manufactured by Merck Co.; hexane/ethyl acetate=3/1)

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

Procedure: A mixture of 5-methoxytryptamine (420 mg) and diethyl glutarate (460 mg) is heated at 175° C. for 18 h. eparation on a column (eluent: EtOAc) gives the amide ster 2. This product is treated with a trace of ara-toluenesulphonic acid in xylene and the water formed is removed using Dean-Stark apparatus. After refluxing for 9 h and separation on a silica plate, N-[2-(5-methoxy)indol-3-ylethyl)]glutarimide is obtained.

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

Procedure: Prepared from diethyl glutarate and ethyl formate in the presence of sodium metal in diethyl ether according to the literature procedure (J. Bigs, P. Sykes, J. Chemical Society (1959), 1849-55). Obtained solid (28 g; 45%). LCMS (ES+) m/z 238 (MH+). Obtained solid (28 g; 45%)

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

Procedure: Prepared from diethyl glutarate and ethyl formate in the presence of sodium metal in diethyl ether according to the literature procedure (J. Bigs, P. Sykes, J. Chemical Society (1959), 1849-55). Obtained solid (28 g; 45%). LCMS (ES+) m/z 238 (MH+). Obtained solid (28 g; 45%)

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

Procedure: 2.0 g of diethyl glutarate and 1.1 g of benzaldehyde were dissolved in 30 ml of tetrahydrofuran, and 8.5 ml of a 1.5M lithium diisopropylamide cyclohexane solution was dropwise added thereto at -78° C. under a nitrogen atmosphere, followed by stirring at the same temperature for 1.5 hours. A saturated ammonium chloride aqueous solution was added to the reaction solution, and the mixture was extracted with ethyl acetate. Then, the organic layer was washed with a saturated sodium chloride aqueous solution and dried over anhydrous magnesium sulfate. The drying agent was filtered off, and then, the solvent was distilled off under reduced pressure. The residue was purified by medium pressure liquid chromatography (Lobar column™, size C, Lichroprep™Si60, manufactured by Merck Co.; hexane/ethyl acetate=3/1) to obtain 1.56 g of the above-identified compound as colorless oily substance. at -78° C. the mixture was extracted with ethyl acetate Then, the organic layer was washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate The drying agent was filtered off the solvent was distilled off under reduced pressure The residue was purified by medium pressure liquid chromatography (Lobar column™, size C, Lichroprep™Si60, manufactured by Merck Co.; hexane/ethyl acetate=3/1)

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

Procedure: A mixture of 5-methoxytryptamine (420 mg) and diethyl glutarate (460 mg) is heated at 175° C. for 18 h. eparation on a column (eluent: EtOAc) gives the amide ster 2. This product is treated with a trace of ara-toluenesulphonic acid in xylene and the water formed is removed using Dean-Stark apparatus. After refluxing for 9 h and separation on a silica plate, N-[2-(5-methoxy)indol-3-ylethyl)]glutarimide is obtained.

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

Procedure: Prepared from diethyl glutarate and ethyl formate in the presence of sodium metal in diethyl ether according to the literature procedure (J. Bigs, P. Sykes, J. Chemical Society (1959), 1849-55). Obtained solid (28 g; 45%). LCMS (ES+) m/z 238 (MH+). Obtained solid (28 g; 45%)

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

Procedure: 2.0 g of diethyl glutarate and 1.1 g of benzaldehyde were dissolved in 30 ml of tetrahydrofuran, and 8.5 ml of a 1.5M lithium diisopropylamide cyclohexane solution was dropwise added thereto at -78° C. under a nitrogen atmosphere, followed by stirring at the same temperature for 1.5 hours. A saturated ammonium chloride aqueous solution was added to the reaction solution, and the mixture was extracted with ethyl acetate. Then, the organic layer was washed with a saturated sodium chloride aqueous solution and dried over anhydrous magnesium sulfate. The drying agent was filtered off, and then, the solvent was distilled off under reduced pressure. The residue was purified by medium pressure liquid chromatography (Lobar column™, size C, Lichroprep™Si60, manufactured by Merck Co.; hexane/ethyl acetate=3/1) to obtain 1.56 g of the above-identified compound as colorless oily substance. at -78° C. the mixture was extracted with ethyl acetate Then, the organic layer was washed with a saturated sodium chloride aqueous solution dried over anhydrous magnesium sulfate The drying agent was filtered off the solvent was distilled off under reduced pressure The residue was purified by medium pressure liquid chromatography (Lobar column™, size C, Lichroprep™Si60, manufactured by Merck Co.; hexane/ethyl acetate=3/1)