3-Oxo-tetrahydrofuran-2-carboxylic acid ethyl ester

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-fluoro-5-chlorobenzamidine (1.05 g, 6.08 mmol, 1.2 eq) in EtOH (20 ml) was added 3-oxo-tetrahydrofuran-2-carboxylic acid ethyl ester (prepared according to Moyer, M. P; Feldman, P. L.; Rapoport, H. J. Org. Chem, 1985, 50, 5223-5230; 800 mg, 5.06 mmol, 1 eq) in ethanol (5 ml). The reaction mixture was heated to 80° C. overnight. The reaction mixture was cooled to r.t. and the crude residue was purified by flash column chromatography (5% MeOH in CHCl3) to afford a white solid 2-(5-chloro-2-fluorophenyl)-6,7-dihydrofuro[3,2-d]pyrimidin-4-ol (650 mg, 53%). The reaction mixture was cooled to r.t. the crude residue was purified by flash column chromatography (5% MeOH in CHCl3)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-fluoro-5-chlorobenzamidine (1.05 g, 6.08 mmol, 1.2 eq) in EtOH (20 ml) was added 3-oxo-tetrahydrofuran-2-carboxylic acid ethyl ester (prepared according to Moyer, M. P; Feldman, P. L.; Rapoport, H. J. Org. Chem, 1985, 50, 5223-5230; 800 mg, 5.06 mmol, 1 eq) in ethanol (5 ml). The reaction mixture was heated to 80° C. overnight. The reaction mixture was cooled to r.t. and the crude residue was purified by flash column chromatography (5% MeOH in CHCl3) to afford a white solid 2-(5-chloro-2-fluorophenyl)-6,7-dihydrofuro[3,2-d]pyrimidin-4-ol (650 mg, 53%). The reaction mixture was cooled to r.t. the crude residue was purified by flash column chromatography (5% MeOH in CHCl3)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-fluoro-5-chlorobenzamidine (1.05 g, 6.08 mmol, 1.2 eq) in EtOH (20 ml) was added 3-oxo-tetrahydrofuran-2-carboxylic acid ethyl ester (prepared according to Moyer, M. P; Feldman, P. L.; Rapoport, H. J. Org. Chem, 1985, 50, 5223-5230; 800 mg, 5.06 mmol, 1 eq) in ethanol (5 ml). The reaction mixture was heated to 80° C. overnight. The reaction mixture was cooled to rt and the crude residue was purified by flash column chromatography (5% MeOH in CHCl3) to afford a white solid 2-(5-chloro-2-fluorophenyl)-6,7-dihydrofuro[3,2-d]pyrimidin-4-ol (650 mg, 53%). The reaction mixture was cooled to rt the crude residue was purified by flash column chromatography (5% MeOH in CHCl3)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-fluoro-5-chlorobenzamidine (1.05 g, 6.08 mmol, 1.2 eq) in EtOH (20 ml) was added 3-oxo-tetrahydrofuran-2-carboxylic acid ethyl ester (prepared according to Moyer, M. P; Feldman, P. L.; Rapoport, H. J. Org. Chem, 1985, 50, 5223-5230; 800 mg, 5.06 mmol, 1 eq) in ethanol (5 ml). The reaction mixture was heated to 80° C. overnight. The reaction mixture was cooled to r.t. and the crude residue was purified by flash column chromatography (5% MeOH in CHCl3) to afford a white solid 2-(5-chloro-2-fluorophenyl)-6,7-dihydrofuro[3,2-d]pyrimidin-4-ol (650 mg, 53%). The reaction mixture was cooled to r.t. the crude residue was purified by flash column chromatography (5% MeOH in CHCl3)