1-oxaspiro[4.5]decan-8-one

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: A mixture of 4-(3-Hydroxypropyl)-4-hydroxy-cyclohexanone ethylene ketal (1.4 g) and diisopropylethylamine (3.37 mL) in methylene chloride (100 mL) at -78° C. was treated with triflic anhydride (1.64 mL). After 30 min the reaction mixture was washed with water, the solvent was dried over magnesium sulfate and removed in vacuo. The residue was dissolved in 30 mL of tetrahydrofuran and 15 mL of 3% HCl. After 5 h at room temperature the reaction mixture was diluted with water and the product was extracted with ether. After drying over magnesium sulfate the solvent was removed in vacuo to afford 1-Oxaspiro[4.5]decan-8-one as an oil. After 30 min the reaction mixture was washed with water the solvent was dried over magnesium sulfate removed in vacuo The residue was dissolved in 30 mL of tetrahydrofuran After 5 h at room temperature the reaction mixture was diluted with water the product was extracted with ether After drying over magnesium sulfate the solvent was removed in vacuo

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

Procedure: A mixture of 4-(3-Hydroxypropyl)-4-hydroxy-cyclohexanone ethylene ketal (1.4 g) and diisopropylethylamine (3.37 mL) in methylene chloride (100 mL) at -78° C. was treated with triflic anhydride (1.64 mL). After 30 min the reaction mixture was washed with water, the solvent was dried over magnesium sulfate and removed in vacuo. The residue was dissolved in 30 mL of tetrahydrofuran and 15 mL of 3% HCl. After 5 h at room temperature the reaction mixture was diluted with water and the product was extracted with ether. After drying over magnesium sulfate the solvent was removed in vacuo to afford 1-Oxaspiro[4.5]decan-8-one as an oil. After 30 min the reaction mixture was washed with water the solvent was dried over magnesium sulfate removed in vacuo The residue was dissolved in 30 mL of tetrahydrofuran After 5 h at room temperature the reaction mixture was diluted with water the product was extracted with ether After drying over magnesium sulfate the solvent was removed in vacuo

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

Procedure: To a solution (70 mL) of 1H-1,2,4-triazol-3-amine (0.29 g) and 1-oxaspiro[4.5]decan-8-one (0.64 g) in acetic acid was added sodium cyanoborohydride (1.1 g), and the mixture was stirred at room temperature for 16 hr. Water was added to the reaction mixture, and the solvent was evaporated under reduced pressure. The obtained residue was poured into saturated aqueous sodium hydrogen carbonate, and the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1). The obtained extract was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained reaction mixture was purified by silica gel column chromatography to give the title compound as a colorless solid (0.25 g, 34%). the solvent was evaporated under reduced pressure The obtained residue was poured into saturated aqueous sodium hydrogen carbonate the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1) The obtained extract was dried over anhydrous sodium sulfate the solvent was evaporated under reduced pressure The obtained reaction mixture was purified by silica gel column chromatography

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

Procedure: To a solution (70 mL) of 1H-1,2,4-triazol-3-amine (0.29 g) and 1-oxaspiro[4.5]decan-8-one (0.64 g) in acetic acid was added sodium cyanoborohydride (1.1 g), and the mixture was stirred at room temperature for 16 hr. Water was added to the reaction mixture, and the solvent was evaporated under reduced pressure. The obtained residue was poured into saturated aqueous sodium hydrogen carbonate, and the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1). The obtained extract was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained reaction mixture was purified by silica gel column chromatography to give the title compound as a colorless solid (0.25 g, 34%). the solvent was evaporated under reduced pressure The obtained residue was poured into saturated aqueous sodium hydrogen carbonate the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1) The obtained extract was dried over anhydrous sodium sulfate the solvent was evaporated under reduced pressure The obtained reaction mixture was purified by silica gel column chromatography

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: A mixture of 4-(3-hydroxypropyl)-4-hydroxy-cyclohexanone ethylene ketal (1.4 g) and diisopropylethylamine (3.37 mL) in methylene chloride (100 mL) at -78° C. was treated with triflic anhydride (1.64 mL). After 30 min the reaction mixture was washed with water, the solvent was dried over magnesium sulfate and removed in vacuo. The residue was dissolved in 30 mL of tetrahydrofuran and 15 mL of 3% HCl. After 5 h at room temperature the reaction mixture was diluted with water and the product was extracted with ether. After drying over magnesium sulfate the solvent was removed in vacuo to afford 1-oxaspiro[4.5]decan-8-one as an oil. After 30 min the reaction mixture was washed with water the solvent was dried over magnesium sulfate removed in vacuo The residue was dissolved in 30 mL of tetrahydrofuran After 5 h at room temperature the reaction mixture was diluted with water the product was extracted with ether After drying over magnesium sulfate the solvent was removed in vacuo

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

Procedure: To a solution (70 mL) of 1H-1,2,4-triazol-3-amine (0.29 g) and 1-oxaspiro[4.5]decan-8-one (0.64 g) in acetic acid was added sodium cyanoborohydride (1.1 g), and the mixture was stirred at room temperature for 16 hr. Water was added to the reaction mixture, and the solvent was evaporated under reduced pressure. The obtained residue was poured into saturated aqueous sodium hydrogen carbonate, and the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1). The obtained extract was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained reaction mixture was purified by silica gel column chromatography to give the title compound as a colorless solid (0.25 g, 34%). the solvent was evaporated under reduced pressure The obtained residue was poured into saturated aqueous sodium hydrogen carbonate the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1) The obtained extract was dried over anhydrous sodium sulfate the solvent was evaporated under reduced pressure The obtained reaction mixture was purified by silica gel column chromatography

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

Procedure: To a solution (70 mL) of 1H-1,2,4-triazol-3-amine (0.29 g) and 1-oxaspiro[4.5]decan-8-one (0.64 g) in acetic acid was added sodium cyanoborohydride (1.1 g), and the mixture was stirred at room temperature for 16 hr. Water was added to the reaction mixture, and the solvent was evaporated under reduced pressure. The obtained residue was poured into saturated aqueous sodium hydrogen carbonate, and the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1). The obtained extract was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained reaction mixture was purified by silica gel column chromatography to give the title compound as a colorless solid (0.25 g, 34%). the solvent was evaporated under reduced pressure The obtained residue was poured into saturated aqueous sodium hydrogen carbonate the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1) The obtained extract was dried over anhydrous sodium sulfate the solvent was evaporated under reduced pressure The obtained reaction mixture was purified by silica gel column chromatography

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

Procedure: A mixture of 4-(3-Hydroxypropyl)-4-hydroxy-cyclohexanone ethylene ketal (1.4 g) and diisopropylethylamine (3.37 mL) in methylene chloride (100 mL) at -78° C. was treated with triflic anhydride (1.64 mL). After 30 min the reaction mixture was washed with water, the solvent was dried over magnesium sulfate and removed in vacuo. The residue was dissolved in 30 mL of tetrahydrofuran and 15 mL of 3% HCl. After 5 h at room temperature the reaction mixture was diluted with water and the product was extracted with ether. After drying over magnesium sulfate the solvent was removed in vacuo to afford 1-Oxaspiro[4.5]decan-8-one as an oil. After 30 min the reaction mixture was washed with water the solvent was dried over magnesium sulfate removed in vacuo The residue was dissolved in 30 mL of tetrahydrofuran After 5 h at room temperature the reaction mixture was diluted with water the product was extracted with ether After drying over magnesium sulfate the solvent was removed in vacuo

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

Procedure: To a solution (70 mL) of 1H-1,2,4-triazol-3-amine (0.29 g) and 1-oxaspiro[4.5]decan-8-one (0.64 g) in acetic acid was added sodium cyanoborohydride (1.1 g), and the mixture was stirred at room temperature for 16 hr. Water was added to the reaction mixture, and the solvent was evaporated under reduced pressure. The obtained residue was poured into saturated aqueous sodium hydrogen carbonate, and the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1). The obtained extract was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The obtained reaction mixture was purified by silica gel column chromatography to give the title compound as a colorless solid (0.25 g, 34%). the solvent was evaporated under reduced pressure The obtained residue was poured into saturated aqueous sodium hydrogen carbonate the mixture was extracted with a mixed solvent of ethyl acetate and isopropyl alcohol (3:1) The obtained extract was dried over anhydrous sodium sulfate the solvent was evaporated under reduced pressure The obtained reaction mixture was purified by silica gel column chromatography

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

Procedure: A mixture of 4-(3-Hydroxypropyl)-4-hydroxy-cyclohexanone ethylene ketal (1.4 g) and diisopropylethylamine (3.37 mL) in methylene chloride (100 mL) at -78° C. was treated with triflic anhydride (1.64 mL). After 30 min the reaction mixture was washed with water, the solvent was dried over magnesium sulfate and removed in vacuo. The residue was dissolved in 30 mL of tetrahydrofuran and 15 mL of 3% HCl. After 5 h at room temperature the reaction mixture was diluted with water and the product was extracted with ether. After drying over magnesium sulfate the solvent was removed in vacuo to afford 1-Oxaspiro[4.5]decan-8-one as an oil. After 30 min the reaction mixture was washed with water the solvent was dried over magnesium sulfate removed in vacuo The residue was dissolved in 30 mL of tetrahydrofuran After 5 h at room temperature the reaction mixture was diluted with water the product was extracted with ether After drying over magnesium sulfate the solvent was removed in vacuo