tert-butyl 3-oxo-1,2,8-triazaspiro[4.5]decane-8-carboxylate

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

Procedure: 4-Fluorobenzylbromide (0.37 mL, 2.97 mmol) was added dropwise to a solution of 84AF15 (289 mg, 1.13 mmol) in dry DMF (50 mL) at rt. The mixture was stirred at rt for 6 days under argon atmosphere. The solvent was removed by evaporation under reduced pressure and the residue partitioned between chloroform and water. The organic layer was dried over sodium sulphate, filtered and concentrated in vacuo. Purification of the residue by column chromatography on silica gel, eluting with dichloromethane, afforded the desired compound (160 mg, 39%). The solvent was removed by evaporation under reduced pressure the residue partitioned between chloroform and water The organic layer was dried over sodium sulphate filtered concentrated in vacuo Purification of the residue by column chromatography on silica gel eluting with dichloromethane

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of hydrazine monohydrate (5.28 mL, 108.8 mmol) in n-butanol (20 mL) was added dropwise to a solution of N-BOC-4-methoxycarbonyl-methylenepiperidine (1.39 g, 5.44 mmol) in n-butanol (120 mL) at rt. The mixture was stirred for 15 h at 120° C. and the mixture allowed to cool to rt. The solvent was removed by evaporation under reduced pressure, the residue partitioned between ethyl acetate and water and the organic layer dried over sodium sulphate, filtered and evaporated to dryness. Purification of the residue by silica gel column chromatography, eluting with a stepwise gradient of 3-6% methanol in dichloromethane, afforded the desired compound (0.88 g, 63%) as white solid. to cool to rt The solvent was removed by evaporation under reduced pressure the residue partitioned between ethyl acetate and water the organic layer dried over sodium sulphate filtered evaporated to dryness Purification of the residue by silica gel column chromatography eluting with a stepwise gradient of 3-6% methanol in dichloromethane

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of hydrazine monohydrate (5.28 mL, 108.8 mmol) in n-butanol (20 mL) was added dropwise to a solution of N-BOC-4-methoxycarbonyl-methylenepiperidine (1.39 g, 5.44 mmol) in n-butanol (120 mL) at rt. The mixture was stirred for 15 h at 120° C. and the mixture allowed to cool to rt. The solvent was removed by evaporation under reduced pressure, the residue partitioned between ethyl acetate and water and the organic layer dried over sodium sulphate, filtered and evaporated to dryness. Purification of the residue by silica gel column chromatography, eluting with a stepwise gradient of 3-6% methanol in dichloromethane, afforded the desired compound (0.88 g, 63%) as white solid. to cool to rt The solvent was removed by evaporation under reduced pressure the residue partitioned between ethyl acetate and water the organic layer dried over sodium sulphate filtered evaporated to dryness Purification of the residue by silica gel column chromatography eluting with a stepwise gradient of 3-6% methanol in dichloromethane

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of hydrazine monohydrate (5.28 mL, 108.8 mmol) in n-butanol (20 mL) was added dropwise to a solution of N-BOC-4-methoxycarbonyl-methylenepiperidine (1.39 g, 5.44 mmol) in n-butanol (120 mL) at rt. The mixture was stirred for 15 h at 120° C. and the mixture allowed to cool to rt. The solvent was removed by evaporation under reduced pressure, the residue partitioned between ethyl acetate and water and the organic layer dried over sodium sulphate, filtered and evaporated to dryness. Purification of the residue by silica gel column chromatography, eluting with a stepwise gradient of 3-6% methanol in dichloromethane, afforded the desired compound (0.88 g, 63%) as white solid. to cool to rt The solvent was removed by evaporation under reduced pressure the residue partitioned between ethyl acetate and water the organic layer dried over sodium sulphate filtered evaporated to dryness Purification of the residue by silica gel column chromatography eluting with a stepwise gradient of 3-6% methanol in dichloromethane

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

Procedure: 4-Fluorobenzylbromide (0.37 mL, 2.97 mmol) was added dropwise to a solution of 84AF15 (289 mg, 1.13 mmol) in dry DMF (50 mL) at rt. The mixture was stirred at rt for 6 days under argon atmosphere. The solvent was removed by evaporation under reduced pressure and the residue partitioned between chloroform and water. The organic layer was dried over sodium sulphate, filtered and concentrated in vacuo. Purification of the residue by column chromatography on silica gel, eluting with dichloromethane, afforded the desired compound (160 mg, 39%). The solvent was removed by evaporation under reduced pressure the residue partitioned between chloroform and water The organic layer was dried over sodium sulphate filtered concentrated in vacuo Purification of the residue by column chromatography on silica gel eluting with dichloromethane

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

Procedure: 4-Fluorobenzylbromide (0.37 mL, 2.97 mmol) was added dropwise to a solution of 84AF15 (289 mg, 1.13 mmol) in dry DMF (50 mL) at rt. The mixture was stirred at rt for 6 days under argon atmosphere. The solvent was removed by evaporation under reduced pressure and the residue partitioned between chloroform and water. The organic layer was dried over sodium sulphate, filtered and concentrated in vacuo. Purification of the residue by column chromatography on silica gel, eluting with dichloromethane, afforded the desired compound (160 mg, 39%). The solvent was removed by evaporation under reduced pressure the residue partitioned between chloroform and water The organic layer was dried over sodium sulphate filtered concentrated in vacuo Purification of the residue by column chromatography on silica gel eluting with dichloromethane

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of hydrazine monohydrate (5.28 mL, 108.8 mmol) in n-butanol (20 mL) was added dropwise to a solution of N-BOC-4-methoxycarbonyl-methylenepiperidine (1.39 g, 5.44 mmol) in n-butanol (120 mL) at rt. The mixture was stirred for 15 h at 120° C. and the mixture allowed to cool to rt. The solvent was removed by evaporation under reduced pressure, the residue partitioned between ethyl acetate and water and the organic layer dried over sodium sulphate, filtered and evaporated to dryness. Purification of the residue by silica gel column chromatography, eluting with a stepwise gradient of 3-6% methanol in dichloromethane, afforded the desired compound (0.88 g, 63 %) as white solid. to cool to rt The solvent was removed by evaporation under reduced pressure the residue partitioned between ethyl acetate and water the organic layer dried over sodium sulphate filtered evaporated to dryness Purification of the residue by silica gel column chromatography eluting with a stepwise gradient of 3-6% methanol in dichloromethane

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

Procedure: 4-Fluorobenzylbromide (0.37 mL, 2.97 mmol) was added dropwise to a solution of 84AF15 (289 mg, 1.13 mmol) in dry DMF (50 mL) at rt. The mixture was stirred at rt for 6 days under argon atmosphere. The solvent was removed by evaporation under reduced pressure and the residue partitioned between chloroform and water. The organic layer was dried over sodium sulphate, filtered and concentrated in vacuo. Purification of the residue by column chromatography on silica gel, eluting with dichloromethane, afforded the desired compound (160 mg, 39%). The solvent was removed by evaporation under reduced pressure the residue partitioned between chloroform and water The organic layer was dried over sodium sulphate filtered concentrated in vacuo Purification of the residue by column chromatography on silica gel eluting with dichloromethane

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of hydrazine monohydrate (5.28 mL, 108.8 mmol) in n-butanol (20 mL) was added dropwise to a solution of N-BOC-4-methoxycarbonyl-methylenepiperidine (1.39 g, 5.44 mmol) in n-butanol (120 mL) at rt. The mixture was stirred for 15 h at 120° C. and the mixture allowed to cool to rt. The solvent was removed by evaporation under reduced pressure, the residue partitioned between ethyl acetate and water and the organic layer dried over sodium sulphate, filtered and evaporated to dryness. Purification of the residue by silica gel column chromatography, eluting with a stepwise gradient of 3-6% methanol in dichloromethane, afforded the desired compound (0.88 g, 63%) as white solid. to cool to rt The solvent was removed by evaporation under reduced pressure the residue partitioned between ethyl acetate and water the organic layer dried over sodium sulphate filtered evaporated to dryness Purification of the residue by silica gel column chromatography eluting with a stepwise gradient of 3-6% methanol in dichloromethane

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

Procedure: 4-Fluorobenzylbromide (0.37 mL, 2.97 mmol) was added dropwise to a solution of 84AF15 (289 mg, 1.13 mmol) in dry DMF (50 mL) at rt. The mixture was stirred at rt for 6 days under argon atmosphere. The solvent was removed by evaporation under reduced pressure and the residue partitioned between chloroform and water. The organic layer was dried over sodium sulphate, filtered and concentrated in vacuo. Purification of the residue by column chromatography on silica gel, eluting with dichloromethane, afforded the desired compound (160 mg, 39%). The solvent was removed by evaporation under reduced pressure the residue partitioned between chloroform and water The organic layer was dried over sodium sulphate filtered concentrated in vacuo Purification of the residue by column chromatography on silica gel eluting with dichloromethane

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of hydrazine monohydrate (5.28 mL, 108.8 mmol) in n-butanol (20 mL) was added dropwise to a solution of N-BOC-4-methoxycarbonyl-methylenepiperidine (1.39 g, 5.44 mmol) in n-butanol (120 mL) at rt. The mixture was stirred for 15 h at 120° C. and the mixture allowed to cool to rt. The solvent was removed by evaporation under reduced pressure, the residue partitioned between ethyl acetate and water and the organic layer dried over sodium sulphate, filtered and evaporated to dryness. Purification of the residue by silica gel column chromatography, eluting with a stepwise gradient of 3–6% methanol in dichloromethane, afforded the desired compound (0.88 g, 63%) as white solid. to cool to rt The solvent was removed by evaporation under reduced pressure the residue partitioned between ethyl acetate and water the organic layer dried over sodium sulphate filtered evaporated to dryness Purification of the residue by silica gel column chromatography eluting with a stepwise gradient of 3–6% methanol in dichloromethane

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

Procedure: 4-Fluorobenzylbromide (0.37 mL, 2.97 mmol) was added dropwise to a solution of 84AF15 (289 mg, 1.13 mmol) in dry DMF (50 mL) at rt. The mixture was stirred at rt for 6 days under argon atmosphere. The solvent was removed by evaporation under reduced pressure and the residue partitioned between chloroform and water. The organic layer was dried over sodium sulphate, filtered and concentrated in vacuo. Purification of the residue by column chromatography on silica gel, eluting with dichloromethane, afforded the desired compound (160 mg, 39%). The solvent was removed by evaporation under reduced pressure the residue partitioned between chloroform and water The organic layer was dried over sodium sulphate filtered concentrated in vacuo Purification of the residue by column chromatography on silica gel eluting with dichloromethane