3-benzyl-8-methyl-3,8-diazabicyclo[3.2.1]octane-2,4-dione

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

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

Procedure: In a dry flask were mixed 15 g of dry pyridine hydrochloride and 3.15 g (130 mmol) of 3-benzyl-2,4-dioxo-8-methyl-3,8-diazabicyclo [3.2.1] octane prepared according to U.S. Pat. No 3,328,398 in June 27, 1967. The mixture was heated in an oil bath preheated at 220° C. for 20 mn, cooled in an ice-bath, dissolved in 90 ml water, extracted four times with 100 ml ethyl ether. The organic layers were collected and dried over magnesium sulfate. After removing the solvent, the residue was chromatographed over silica-gel using dichloromethane/ethylacetate (80:20) to afford 1.5 g of the title compound (50%). M.P. 72° C. prepared The mixture was heated in an oil bath preheated at 220° C. for 20 mn cooled in an ice-bath extracted four times with 100 ml ethyl ether The organic layers were collected dried over magnesium sulfate After removing the solvent the residue was chromatographed over silica-gel

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

Procedure: In a dry flask were mixed 15 g of dry pyridine hydrochloride and 3.15 g (130 mmol) of 3-benzyl-2,4-dioxo-8-methyl-3,8-diazabicyclo [3.2.1] octane prepared according to U.S. Pat. No 3,328,398 in June 27, 1967. The mixture was heated in an oil bath preheated at 220° C. for 20 mn, cooled in an ice-bath, dissolved in 90 ml water, extracted four times with 100 ml ethyl ether. The organic layers were collected and dried over magnesium sulfate. After removing the solvent, the residue was chromatographed over silica-gel using dichloromethane/ethylacetate (80:20) to afford 1.5 g of the title compound (50%). M.P. 72° C. prepared The mixture was heated in an oil bath preheated at 220° C. for 20 mn cooled in an ice-bath extracted four times with 100 ml ethyl ether The organic layers were collected dried over magnesium sulfate After removing the solvent the residue was chromatographed over silica-gel

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

Procedure: A solution of 3-benzyl-2,4-dioxo-8-methyl-3,8-diazabicyclo (3.2.1)octane (2.05 g, 8.91 mmoles) in dry ether (100 mL) was treated gradually with lithium aluminum hydride (1.52 g, 4 mmoles), heated under reflux for one hour, and hydrolyzed successively with 50 mL of water-saturated ether and then 10 mL of water. This mixture was filtered on a celite pad. The filtrate was dried over magnesium sulfate and then evaporated to give the crude titled product which was used without any purification for further uses. heated under reflux for one hour This mixture was filtered on a celite pad The filtrate was dried over magnesium sulfate evaporated

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

Procedure: A mixture of 3-benzyl-2,4-dioxo-8-methyl-3,8-diazabicyclo(3.2.1)octane (U.S. Pat. No. 3,328,396) (1.05 g) and pyridinium hydrochloride (5 g) was heated in an oil-bath at 220° C. for 25 minutes. After cooling, the mixture was taken up with water (30 mL) and extracted with ether. The organic layer was dried over magnesium sulfate, evaporated to give 0.45 g of crude product which was chromatographed over silica gel using dichloromethane - ethyl acetate 80:20 as eluent to give 0.3 g of crystallized titled product. MP 72° C. After cooling extracted with ether The organic layer was dried over magnesium sulfate evaporated

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

Procedure: In a dry flask were mixed 15 g of dry pyridine hydrochloride and 3.15 g (130 mmol) of 3-benzyl-2,4-dioxo-8-methyl-3,8-diazabicyclo [3.2.1] octane prepared according to U.S. Pat. No. 3,328,398 in 1967, Jun. 27. The mixture was heated in an oil bath preheated at 220° C. for 20 mn, cooled in an ice-bath, dissolved in 90 ml water, extracted four times with 100 ml ethyl ether. The organic layers were collected and dried over magnesium sulfate. After removing the solvent, the residue was chromatographied over silica-gel using dichloromethane/ethylacetate (80:20) to afford 1.5 g of the title compound (50%). M.P. 72° C. prepared The mixture was heated in an oil bath preheated at 220° C. for 20 mn cooled in an ice-bath extracted four times with 100 ml ethyl ether The organic layers were collected dried over magnesium sulfate After removing the solvent

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

Procedure: A solution of 3-benzyl-2,4-dioxo-8-methyl-3,8-diazabicyclo (3.2.1)octane (2.05 g, 8.91 mmoles) in dry ether (100 mL) was treated gradually with lithium aluminum hydride (1.52 g, 4 mmoles), heated under reflux for one hour, and hydrolyzed successively with 50 mL of water-saturated ether and then 10 mL of water. This mixture was filtered on a celite pad. The filtrate was dried over magnesium sulfate and then evaporated to give the crude titled product which was used without any purification for further uses. heated under reflux for one hour This mixture was filtered on a celite pad The filtrate was dried over magnesium sulfate evaporated

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

Procedure: A mixture of 3-benzyl-2,4-dioxo-8-methyl-3,8-diazabicyclo-(3.2.1)octane (U.S. Pat. No. 3,328,396) (1.05 g) and pyridinium hydrochloride (5 g) was heated in an oil-bath at 220° C. for 25 minutes. After cooling, the mixture was taken up with water (30 mL) and extracted with ether. The organic layer was dried over magnesium sulfate, evaporated to give 0.45 g of crude product which was chromatographed over silica gel using dichloromethane-ethyl acetate 80:20 as eluent to give 0.3 g of crystallized titled product. MP 72° C. After cooling extracted with ether The organic layer was dried over magnesium sulfate evaporated

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

Procedure: To a solution of 3-benzyl-8-methyl-3,8-diazabicyclo[3.2.1]octane-2,4-dione (28.3 g, 0.116 mol) in 200 ml of absolute dioxane LiAlH4 (7.6 g, 0.2 mol) was added and the mixture boiled under argon for 18 h. Then a mixture of water (7.5 ml) and dioxane (40 ml) was added dropwise to the reaction mixture. The suspension was mixed for 20 min and filtered trough a dense glass filter. The filtrate was evaporated and the residue was distilled on Büchi oven for distillation at 120° C. and 0.1 mbar. Yield 17.6 g (70%). was added dropwise to the reaction mixture The suspension was mixed for 20 min filtered trough a dense glass filter The filtrate was evaporated the residue was distilled on Büchi oven for distillation at 120° C.

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

Procedure: To a solution of 3-benzyl-8-methyl-3,8-diazabicyclo[3.2.1]octane-2,4-dione (28.3 g, 0.116 mol) in 200 ml of absolute dioxane LiAlH4 (7.6 g, 0.2 mol) was added and the mixture boiled under argon for 18 h. Then a mixture of water (7.5 ml) and dioxane (40 ml) was added dropwise to the reaction mixture. The suspension was mixed for 20 min and filtered trough a dense glass filter. The filtrate was evaporated and the residue was distilled on Büchi oven for distillation at 120° C. and 0.1 mbar. Yield 17.6 g (70%). was added dropwise to the reaction mixture The suspension was mixed for 20 min filtered trough a dense glass filter The filtrate was evaporated the residue was distilled on Büchi oven for distillation at 120° C.

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

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

Procedure: To a solution of 3-benzyl-8-methyl-3,8-diazabicyclo[3.2.1]octane-2,4-dione (28.3 g; 0.116 mol) in 200 ml of absolute dioxane LiAlH4 (7.6 g; 0.2 mol) was added and the mixture boiled under argon for 18 hours. Then a mixture of water (7.5 ml) and dioxane (40 ml) was added drop-wise to the reaction mixture. The suspension was mixed for 20 minutes and filtered trough a dense glass filter. The filtrate was evaporated and the residue was distilled on Büchi oven for distillation at 120° C. and 0.1 mbar. Yield 17.6 g (70%). was added drop-wise to the reaction mixture The suspension was mixed for 20 minutes filtered trough a dense glass filter The filtrate was evaporated the residue was distilled on Büchi oven for distillation at 120° C.