[3-(aminomethyl)oxetan-3-yl]methanol

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (S)-2-[benzyloxycarbonyl-(2-oxo-ethyl)-amino]-propionic acid methyl ester (intermediate 27C; 258 mg, 0.92 mmol) in dichloromethane (1 mL) was added at room temperature to a suspension of (3-(aminomethyl)oxetan-3-yl)methanol (108 mg, 0.92 mmol), sodium triacetoxyborohyride (222 mg, 1.01 mmol) and acetic acid (111 mg, 1.85 mmol) in dichloromethane (1 mL). The reaction mixture was heated at 40° C. for 16 h, then partitioned between 1 M aq. sodium carbonate solution and ethyl acetate. The organic layer was washed with brine, dried (MgSO4), and evaporated. The residue was taken up in methanol (2 mL), then after addition of potassium carbonate (255 mg, 1.85 mmol) the suspension was stirred for 2 h. The reaction mixture was partitioned between sat. aq. ammonium chloride solution and ethyl acetate. The organic layer was washed with brine, dried (MgSO4), and evaporated. Chromatography (SiO2; dichloromethane/methanol/25% aq. ammonia solution 90:10:0.25) afforded the title compound (45 mg, 14%). Light yellow oil, MS (ISP)=349.3 (M+H)+. partitioned between 1 M aq. sodium carbonate solution and ethyl acetate The organic layer was washed with brine dried (MgSO4) evaporated The reaction mixture was partitioned between sat. aq. ammonium chloride solution and ethyl acetate The organic layer was washed with brine dried (MgSO4) evaporated

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

Procedure: A mixture of 3-aminomethyl-3-hydroxymethyloxetane (1.17 g, 0.01 mol), 2-amino-4,6-dichloropyrimidine (1.64 g, 0.01 mol), ethanol (40 ml) and triethylamine (4 ml) was refluxed for one day. The solvent was distilled away under reduced pressure and ethyl acetate was added to the residue. The mixture was washed with water and dried over anhydrous magnesium sulfate. The solvent was distilled away under reduced pressure and the residue was purified by silica gel column chromatography (chloroform:methanol=20:1, later 10:1) to give colorless prism crystals (0.8 g, 32.8%), m.p. 185-186° C. (acetone). was refluxed for one day The solvent was distilled away under reduced pressure and ethyl acetate was added to the residue The mixture was washed with water dried over anhydrous magnesium sulfate The solvent was distilled away under reduced pressure the residue was purified by silica gel column chromatography (chloroform

Conditions: temp:40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (S)-2-[benzyloxycarbonyl-(2-oxo-ethyl)-amino]-propionic acid methyl ester (intermediate 27C; 258 mg, 0.92 mmol) in dichloromethane (1 mL) was added at room temperature to a suspension of (3-(aminomethyl)oxetan-3-yl)methanol (108 mg, 0.92 mmol), sodium triacetoxyborohyride (222 mg, 1.01 mmol) and acetic acid (111 mg, 1.85 mmol) in dichloromethane (1 mL). The reaction mixture was heated at 40° C. for 16 h, then partitioned between 1 M aq. sodium carbonate solution and ethyl acetate. The organic layer was washed with brine, dried (MgSO4), and evaporated. The residue was taken up in methanol (2 mL), then after addition of potassium carbonate (255 mg, 1.85 mmol) the suspension was stirred for 2 h. The reaction mixture was partitioned between sat. aq. ammonium chloride solution and ethyl acetate. The organic layer was washed with brine, dried (MgSO4), and evaporated. Chromatography (SiO2; dichloromethane/methanol/25% aq. ammonia solution 90:10:0.25) afforded the title compound (45 mg, 14%). Light yellow oil, MS (ISP)=349.3 (M+H)+. partitioned between 1 M aq. sodium carbonate solution and ethyl acetate The organic layer was washed with brine dried (MgSO4) evaporated The reaction mixture was partitioned between sat. aq. ammonium chloride solution and ethyl acetate The organic layer was washed with brine dried (MgSO4) evaporated