3-oxa-1-azaspiro[4.5]decane

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

Procedure: To a 500 mL flask containing 1-amino-cyclohexylmethanol (135 g, 1.05 mol) and methanol (50 mL) is added methyl formcel (53 mL of 55% formaldehyde in methanol/water, 1.06 mol) dropwise over a 1 hour period. During the addition, the stirred solution is warmed gently from room temperature to 37° C. After the addition is completed, the mixture is allowed to stir overnight at room temperature. The clear, colorless reaction mixture is stripped on a rotary evaporator (50° C./29″ vacuum). The resulting oil is distilled under vacuum giving a clear, colorless, mobile liquid with a boiling point of 43° C./0.8 torr. A total of 123.4 g is collected (83% yield). A GC analysis indicates 95.6% purity. During the addition the stirred solution is warmed gently from room temperature to 37° C After the addition The clear, colorless reaction mixture is stripped on a rotary evaporator (50° C./29″ vacuum) The resulting oil is distilled under vacuum giving a clear, colorless, mobile liquid with a boiling point of 43° C./0.8 torr A total of 123.4 g is collected (83% yield)

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

Procedure: To a 500 mL flask containing 1-amino-cyclohexylmethanol (135 g, 1.05 mol) and methanol (50 mL) is added methyl formcel (53 mL of 55% formaldehyde in methanol/water, 1.06 mol) dropwise over a 1 hour period. During the addition, the stirred solution is warmed gently from room temperature to 37° C. After the addition is completed, the mixture is allowed to stir overnight at room temperature. The clear, colorless reaction mixture is stripped on a rotary evaporator (50° C./29″ vacuum). The resulting oil is distilled under vacuum giving a clear, colorless, mobile liquid with a boiling point of 43° C./0.8 torr. A total of 123.4 g is collected (83% yield). A GC analysis indicates 95.6% purity. During the addition the stirred solution is warmed gently from room temperature to 37° C After the addition The clear, colorless reaction mixture is stripped on a rotary evaporator (50° C./29″ vacuum) The resulting oil is distilled under vacuum giving a clear, colorless, mobile liquid with a boiling point of 43° C./0.8 torr A total of 123.4 g is collected (83% yield)

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

Procedure: To a 500 mL flask containing 1-amino-cyclohexylmethanol (135 g, 1.05 mol) and methanol (50 mL) is added methyl formcel (53 mL of 55% formaldehyde in methanol/water, 1.06 mol) dropwise over a 1 hour period. During the addition, the stirred solution is warmed gently from room temperature to 37° C. After the addition is completed, the mixture is allowed to stir overnight at room temperature. The clear, colorless reaction mixture is stripped on a rotary evaporator (50° C./29″ vacuum). The resulting oil is distilled under vacuum giving a clear, colorless, mobile liquid with a boiling point of 43° C./0.8 torr. A total of 123.4 g is collected (83% yield). A GC analysis indicates 95.6% purity. During the addition the stirred solution is warmed gently from room temperature to 37° C After the addition The clear, colorless reaction mixture is stripped on a rotary evaporator (50° C./29″ vacuum) The resulting oil is distilled under vacuum giving a clear, colorless, mobile liquid with a boiling point of 43° C./0.8 torr A total of 123.4 g is collected (83% yield)