(2R)-2-[tert-butyl(dimethyl)silyl]oxypropanal

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

Procedure: (2E)-5-Amino-5-methylhex-2-enoic acid N-methyl-N-((1R)-1-(N-methyl-N-((1R)-1-(methylcarbamoyl)-2-phenylethyl)carbamoyl)-2-(2-naphthyl)ethyl)amide (318 mg, 0.60 mmol) was dissolved in methanol (20 ml) and glacial acetic acid (0.48 ml, 8.4 mmol). 3 Å mol sieves (9 g) and a solution of (2R)-2-(tert-butyldimethylsilyloxy)propanal (1.33 g, 7.06 mmol) in methanol (10 ml) were added successively. Sodium cyanoborohydride (220 mg, 3.53 mmol) was added as a solid. The reaction mixture was stirred at room temperature for 45 min, before a second batch of sodium cyanoborohydride (220 mg, 3.53 mmol) was added. The reaction mixture was stirred for 16 h at room temperature. The mol sieves was filtered off through a plug of celite. The celite was washed with methanol (200 ml). The solvents of the combined filtrates were removed in vacuo. The residue was dissolved in 1 N sodium hydroxide solution (50 ml) and tert-butyl methyl ether (50 ml). The phases were separated. The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (35 g), using ethyl acetate/heptane/triethylamine (20:10:1) as eluent, to give 99 mg of (2R)-2-(N-((2R)-2-(N-((2E)-5-((2R)-2-(tert-butyldimethylsilyloxy)propylamino)-5-methylhex-2-enoyl)-N-methylamino)-3-(2-naphthyl)propionyl)-N-methylamino)-N-methyl-3-phenylpropionamide. was added The mol sieves was filtered off through a plug of celite The celite was washed with methanol (200 ml) The solvents of the combined filtrates were removed in vacuo The residue was dissolved in 1 N sodium hydroxide solution (50 ml) The phases were separated The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml) The combined organic layers were dried over magnesium sulfate The solvent was removed in vacuo The crude product was purified by flash chromatography on silica (35 g)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under the nitrogen atmosphere, 3.02 g (11 mmole) of diethyl-p-methylphenylthiomethyl phosphonate was dissolved in 50 ml of anhydrous tetrahydrofuran and after lowering the reaction temperature to -78° C., 6.25 ml (10 mmole) of 1.6M n-BuLi was added to the reaction mixture for ten minutes, and the resultant mixture was agitated at the temperature of -78° C. for 30 minutes. At the same temperature, 1.87 g (10 mmole) of (2R)-2-(t-butyldimethylsilyloxy)propanal diluted with 10 ml of anhydrous tetrahydrofuran was added to the said mixture and the reaction temperature was slowly raised from -78° C. to 0° C., and then the the mixture agitated at 0° C. for another one hour. Once the reaction was completed, the reaction was quenched by adding saturated ammonium chloride solution. After the work-up treatment in the same manner as did in method A of EXAMPLE 32, 2.8 g of crude product was obtained. The crude product was purified by a column chromatography (using n-hexane containing 1% diethyl ether as an eluent), thereby obtaining 2.5 g of desired compound having E/Z ratio of over 100/1 (yield: 81%) stereoselectively. to -78° C. was added to the said mixture the reaction temperature was slowly raised from -78° C. to 0° C. the reaction was quenched by adding saturated ammonium chloride solution 2.8 g of crude product was obtained The crude product was purified by a column chromatography (

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under the nitrogen atmosphere, 3.24g (11 mmole) of diethyl-p-methoxyphenylthiomethyl phosphonate was dissolved in 50 ml of anhydrous tetrahydrofuran and after lowering the reaction temperature to -78° C., 6.87 ml (11 mmole) of 1.6M n-BuLi was added to the mixture for ten minutes. The resultant mixture was agitated at the temperature of -78° C. for 30 minutes. At the same temperature, 1.87 g (10 mmole) of (2R)-2-(t-butyldimethylsilyloxy)propanal diluted with 10 ml of anhydrous tetrahydrofuran was added to the said reaction mixture and the reaction temperature raised to 0° C., and then the mixture agitated at 0° C. for another 1.5 hours. Once the reaction was completed, the reaction was quenched by adding saturated ammonium chloride solution. After the work-up treatment in the same manner as did in method A of EXAMPLE 32, the crude product (2.92 g) obtained therefrom was purified by a column chromatography (using n-hexane containing 3% diethyl ether as an eluent), thereby 2.59 g of desired compound having E/Z ratio of over 100/1 (yield: 80%) was stereoselectively obtained. to -78° C. was added to the said reaction mixture the reaction was quenched by adding saturated ammonium chloride solution

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

Procedure: (2E)-5-Amino-5-methylhex-2-enoic acid N-methyl-N-((1R)-1-(N-methyl-N-((1R)-1-(methylcarbamoyl)-2-phenylethyl)carbamoyl)-2-(2-naphthyl)ethyl)amide (318 mg, 0.60 mmol) was dissolved in methanol (20 ml) and glacial acetic acid (0.48 ml, 8.4 mmol). 3 Å mol sieves (9 g) and a solution of (2R)-2-(tert-butyldimethylsilyloxy)propanal (1.33 g, 7.06 mmol) in methanol (10 ml) were added successively. Sodium cyanoborohydride (220 mg, 3.53 mmol) was added as a solid. The reaction mixture was stirred at room temperature for 45 min, before a second batch of sodium cyanoborohydride (220 mg, 3.53 mmol) was added. The reaction mixture was stirred for 16 h at room temperature. The mol sieves was filtered off through a plug of celite. The celite was washed with methanol (200 ml). The solvents of the combined filtrates were removed in vacuo. The residue was dissolved in 1 N sodium hydroxide solution (50 ml) and tert-butyl methyl ether (50 ml). The phases were separated. The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (35 g), using ethyl acetate/heptane/triethylamine (20:10:1) as eluent, to give 99 mg of (2R)-2-(N-((2R)-2-(N-((2E)-5-((2R)-2-(tert-butyldimethylsilyloxy)propylamino)-5-methylhex-2-enoyl)-N-methylamino)-3-(2-naphthyl)propionyl)-N-methylamino)-N-methyl-3-phenylpropionamide. was added The mol sieves was filtered off through a plug of celite The celite was washed with methanol (200 ml) The solvents of the combined filtrates were removed in vacuo The residue was dissolved in 1 N sodium hydroxide solution (50 ml) The phases were separated The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml) The combined organic layers were dried over magnesium sulfate The solvent was removed in vacuo The crude product was purified by flash chromatography on silica (35 g)

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

Procedure: (2E)-5-Amino-5-methylhex-2-enoic acid N-methyl-N-((1R)-1-(N-methyl-N-((1R)-1-(methylcarbamoyl)-2-phenylethyl)carbamoyl)-2-(2-naphthyl)ethyl)amide (318 mg, 0.60 mmol) was dissolved in methanol (20 ml) and glacial acetic acid (0.48 ml, 8.4 mmol). 3 Å mol sieves (9 g) and a solution of (2R)-2-(tert-butyldimethylsilyloxy)propanal (1.33 g, 7.06 mmol) in methanol (10 ml) were added successively. Sodium cyanoborohydride (220 mg, 3.53 mmol) was added as a solid. The reaction mixture was stirred at room temperature for 45 min, before a second batch of sodium cyanoborohydride (220 mg, 3.53 mmol) was added. The reaction mixture was stirred for 16 h at room temperature. The mol sieves was filtered off through a plug of celite. The celite was washed with methanol (200 ml). The solvents of the combined filtrates were removed in vacuo. The residue was dissolved in 1 N sodium hydroxide solution (50 ml) and tert-butyl methyl ether (50 ml). The phases were separated. The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (35 g), using ethyl acetate/heptane/triethylamine (20:10:1) as eluent, to give 99 mg of (2R)-2-(N-((2R)-2-(N-((2E)-5-((2R)-2-(tert-butyldimethylsilyloxy)propylamino)-5-methylhex-2-enoyl)-N-methylamino)-3-(2-naphthyl)propionyl)-N-methylamino)-N-methyl-3-phenylpropionamide. was added The mol sieves was filtered off through a plug of celite The celite was washed with methanol (200 ml) The solvents of the combined filtrates were removed in vacuo The residue was dissolved in 1 N sodium hydroxide solution (50 ml) The phases were separated The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml) The combined organic layers were dried over magnesium sulfate The solvent was removed in vacuo The crude product was purified by flash chromatography on silica (35 g)

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

Procedure: (2E)-5-Amino-5-methylhex-2-enoic acid N-methyl-N-((1R)-1-(N-methyl-N-((1R)-1-(methylcarbamoyl)-2-phenylethyl)carbamoyl)-2-(2-naphthyl)ethyl)amide (318 mg, 0.60 mmol) was dissolved in methanol (20 ml) and glacial acetic acid (0.48 ml, 8.4 mmol). 3 Å mol sieves (9 g) and a solution of (2R)-2-(tert-butyldimethylsilyloxy)propanal (1.33 g, 7.06 mmol) in methanol (10 ml) were added successively. Sodium cyanoborohydride (220 mg, 3.53 mmol) was added as a solid. The reaction mixture was stirred at room temperature for 45 min, before a second batch of sodium cyanoborohydride (220 mg, 3.53 mmol) was added. The reaction mixture was stirred for 16 h at room temperature. The mol sieves was filtered off through a plug of celite. The celite was washed with methanol (200 ml). The solvents of the combined filtrates were removed in vacuo. The residue was dissolved in 1 N sodium hydroxide solution (50 ml) and tert-butyl methyl ether (50 ml). The phases were separated. The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (35 g), using ethyl acetate/heptane/triethylamine (20:10:1) as eluent, to give 99 mg of (2R)-2-(N-((2R)-2-(N-((2E)-5-((2R)-2-(tert-butyldimethylsilyloxy)propylamino)-5-methylhex-2-enoyl)-N-methylamino)-3-(2-naphthyl)propionyl)-N-methylamino)-N-methyl-3-phenylpropionamide. was added The mol sieves was filtered off through a plug of celite The celite was washed with methanol (200 ml) The solvents of the combined filtrates were removed in vacuo The residue was dissolved in 1 N sodium hydroxide solution (50 ml) The phases were separated The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml) The combined organic layers were dried over magnesium sulfate The solvent was removed in vacuo The crude product was purified by flash chromatography on silica (35 g)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under the nitrogen atmosphere, 3.02 g (11 mmole) of diethyl-p-methylphenylthiomethyl phosphonate was dissolved in 50 ml of anhydrous tetrahydrofuran and after lowering the reaction temperature to -78° C., 6.25 ml (10 mmole) of 1.6M n-BuLi was added to the reaction mixture for ten minutes, and the resultant mixture was agitated at the temperature of -78° C. for 30 minutes. At the same temperature, 1.87 g (10 mmole) of (2R)-2-(t-butyldimethylsilyloxy)propanal diluted with 10 ml of anhydrous tetrahydrofuran was added to the said mixture and the reaction temperature was slowly raised from -78° C. to 0° C., and then the the mixture agitated at 0° C. for another one hour. Once the reaction was completed, the reaction was quenched by adding saturated ammonium chloride solution. After the work-up treatment in the same manner as did in method A of EXAMPLE 32, 2.8 g of crude product was obtained. The crude product was purified by a column chromatography (using n-hexane containing 1% diethyl ether as an eluent), thereby obtaining 2.5 g of desired compound having E/Z ratio of over 100/1 (yield: 81%) stereoselectively. to -78° C. was added to the said mixture the reaction temperature was slowly raised from -78° C. to 0° C. the reaction was quenched by adding saturated ammonium chloride solution 2.8 g of crude product was obtained The crude product was purified by a column chromatography (

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Under the nitrogen atmosphere, 3.24g (11 mmole) of diethyl-p-methoxyphenylthiomethyl phosphonate was dissolved in 50 ml of anhydrous tetrahydrofuran and after lowering the reaction temperature to -78° C., 6.87 ml (11 mmole) of 1.6M n-BuLi was added to the mixture for ten minutes. The resultant mixture was agitated at the temperature of -78° C. for 30 minutes. At the same temperature, 1.87 g (10 mmole) of (2R)-2-(t-butyldimethylsilyloxy)propanal diluted with 10 ml of anhydrous tetrahydrofuran was added to the said reaction mixture and the reaction temperature raised to 0° C., and then the mixture agitated at 0° C. for another 1.5 hours. Once the reaction was completed, the reaction was quenched by adding saturated ammonium chloride solution. After the work-up treatment in the same manner as did in method A of EXAMPLE 32, the crude product (2.92 g) obtained therefrom was purified by a column chromatography (using n-hexane containing 3% diethyl ether as an eluent), thereby 2.59 g of desired compound having E/Z ratio of over 100/1 (yield: 80%) was stereoselectively obtained. to -78° C. was added to the said reaction mixture the reaction was quenched by adding saturated ammonium chloride solution

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

Procedure: (2E)-5-Amino-5-methylhex-2-enoic acid N-methyl-N-((1R)-1-(N-methyl-N-((1R)-1-(methylcarbamoyl)-2-phenylethyl)carbamoyl)-2-(2-naphthyl)ethyl)amide (318 mg, 0.60 mmol) was dissolved in methanol (20 ml) and glacial acetic acid (0.48 ml, 8.4 mmol). 3 Å mol sieves (9 g) and a solution of (2R)-2-(tert-butyldimethylsilyloxy)propanal (1.33 g, 7.06 mmol) in methanol (10 ml) were added successively. Sodium cyanoborohydride (220 mg, 3.53 mmol) was added as a solid. The reaction mixture was stirred at room temperature for 45 min, before a second batch of sodium cyanoborohydride (220 mg, 3.53 mmol) was added. The reaction mixture was stirred for 16 h at room temperature. The mol sieves was filtered off through a plug of celite. The celite was washed with methanol (200 ml). The solvents of the combined filtrates were removed in vacuo. The residue was dissolved in 1 N sodium hydroxide solution (50 ml) and tert-butyl methyl ether (50 ml). The phases were separated. The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (35 g), using ethyl acetate/heptane/triethylamine (20:10:1) as eluent, to give 99 mg of (2R)-2-(N-((2R)-2-(N-((2E)-5-((2R)-2-(tert-butyldimethylsilyloxy)propylamino)-5-methylhex-2-enoyl)-N-methylamino)-3-(2-naphthyl)propionyl)-N-methylamino)-N-methyl-3-phenylpropionamide. was added The mol sieves was filtered off through a plug of celite The celite was washed with methanol (200 ml) The solvents of the combined filtrates were removed in vacuo The residue was dissolved in 1 N sodium hydroxide solution (50 ml) The phases were separated The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml) The combined organic layers were dried over magnesium sulfate The solvent was removed in vacuo The crude product was purified by flash chromatography on silica (35 g)

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

Procedure: (2E)-5-Amino-5-methylhex-2-enoic acid N-methyl-N-((1R)-1-(N-methyl-N-((1R)-1-(methylcarbamoyl)-2-phenylethyl)carbamoyl)-2-(2-naphthyl)ethyl)amide (318 mg, 0.60 mmol) was dissolved in methanol (20 ml) and glacial acetic acid (0.48 ml, 8.4 mmol). 3 Å mol sieves (9 g) and a solution of (2R)-2-(tert-butyldimethylsilyloxy)propanal (1.33 9, 7.06 mmol) in methanol (10 ml) were added successively. Sodium cyanoborohydride (220 mg, 3.53 mmol) was added as a solid. The reaction mixture was stirred at room temperature for 45 min, before a second batch of sodium cyanoborohydride (220 mg, 3.53 mmol) was added. The reaction mixture was stirred for 16 h at room temperature. The mol sieves was filtered off through a plug of celite. The celite was washed with methanol (200 ml). The solvents of the combined filtrates were removed in vacuo. The residue was dissolved in 1 N sodium hydroxide solution (50 ml) and tert-butyl methyl ether (50 ml). The phases were separated. The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (35 g), using ethyl acetate/heptane/triethylamine (20:10:1) as eluent, to give 99 mg of (2R)-2-(N-((2R)-2-(N-((2E)-5-((2R)-2-(tert-butyldimethylsilyloxy)propylamino)-5-methylhex-2-enoyl)-N-methylamino)-3-(2-naphthyl)propionyl)-N-methylamino)-N-methyl-3-phenylpropionamide. was added The mol sieves was filtered off through a plug of celite The celite was washed with methanol (200 ml) The solvents of the combined filtrates were removed in vacuo The residue was dissolved in 1 N sodium hydroxide solution (50 ml) The phases were separated The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml) The combined organic layers were dried over magnesium sulfate The solvent was removed in vacuo The crude product was purified by flash chromatography on silica (35 g)

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

Procedure: (2E)-5-Amino-5-methylhex-2-enoic acid N-methyl-N-((1R)-1-(N-methyl-N-((1R)-1-(methylcarbamoyl)-2-phenylethyl)carbamoyl)-2-(2-naphthyl)ethyl)amide (318 mg, 0.60 mmol) was dissolved in methanol (20 ml) and glacial acetic acid (0.48 ml, 8.4 mmol). 3 Å mol sieves (9 g) and a solution of (2R)-2-(tert-butyldimethylsilyloxy)propanal (1.33 g, 7.06 mmol) in methanol (10 ml) were added successively. Sodium cyanoborohydride (220 mg, 3.53 mmol) was added as a solid. The reaction mixture was stirred at room temperature for 45 min, before a second batch of sodium cyanoborohydride (220 mg, 3.53 mmol) was added. The reaction mixture was stirred for 16 h at room temperature. The mol sieves was filtered off through a plug of celite. The celite was washed with methanol (200 ml). The solvents of the combined filtrates were removed in vacuo. The residue was dissolved in 1 N sodium hydroxide solution (50 ml) and tert-butyl methyl ether (50 ml). The phases were separated. The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (35 g), using ethyl acetate/heptane/triethylamine (20:10:1) as eluent, to give 99 mg of (2R)-2-(N-((2R)-2-(N-((2E)-5-((2R)-2-(tert-butyldimethylsilyloxy)propylamino)-5-methylhex-2-enoyl)-N-methylamino)-3-(2-naphthyl)propionyl)-N-methylamino)-N-methyl-3-phenylpropionamide. was added The mol sieves was filtered off through a plug of celite The celite was washed with methanol (200 ml) The solvents of the combined filtrates were removed in vacuo The residue was dissolved in 1 N sodium hydroxide solution (50 ml) The phases were separated The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml) The combined organic layers were dried over magnesium sulfate The solvent was removed in vacuo The crude product was purified by flash chromatography on silica (35 g)

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

Procedure: (2E)-5-Amino-5-methylhex-2-enoic acid N-methyl-N-((1R)-1-(N-methyl-N-((1R)-1-(methylcarbamoyl)-2-phenylethyl)carbamoyl)-2-(2-naphthyl)ethyl)amide (318 mg, 0.60 mmol) was dissolved in methanol (20 ml) and glacial acetic acid (0.48 ml, 8.4 mmol). 3 Å mol sieves (9 g) and a solution of (2R)-2-(tert-butyldimethylsilyloxy)propanal (1.33 g, 7.06 mmol) in methanol (10 ml) were added successively. Sodium cyanoborohydride (220 mg, 3.53 mmol) was added as a solid. The reaction mixture was stirred at room temperature for 45 min, before a second batch of sodium cyanoborohydride (220 mg, 3.53 mmol) was added. The reaction mixture was stirred for 16 h at room temperature. The mol sieves was filtered off through a plug of celite. The celite was washed with methanol (200 ml). The solvents of the combined filtrates were removed in vacuo. The residue was dissolved in 1 N sodium hydroxide solution (50 ml) and tert-butyl methyl ether (50 ml). The phases were separated. The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml). The combined organic layers were dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (35 g), using ethyl acetate/heptane/triethylamine (20:10:1) as eluent, to give 99 mg of (2R)-2-(N-((2R)-2-(N-((2E)-5-((2R)-2-(tert-butyldimethylsilyloxy)propylamino)-5-methylhex-2-enoyl)-N-methylamino)-3-(2-naphthyl)propionyl)-N-methylamino)-N-methyl-3-phenylpropionamide. was added The mol sieves was filtered off through a plug of celite The celite was washed with methanol (200 ml) The solvents of the combined filtrates were removed in vacuo The residue was dissolved in 1 N sodium hydroxide solution (50 ml) The phases were separated The aqueous phase was extracted with tert-butyl methyl ether (3×50 ml) The combined organic layers were dried over magnesium sulfate The solvent was removed in vacuo The crude product was purified by flash chromatography on silica (35 g)