methyl 4,4-dimethyl-2-oxocyclopentane-1-carboxylate

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

Procedure: A solution of 4,4-Dimethyl-2-oxo-cyclopentanecarboxylic acid methyl ester (2.08 g, 12.21 mmol) and 5-Chloro-2-fluoro-benzamidine (2.32 g, 13.44 mmol) in 100% ethanol (40 mL) was heated to reflux overnight, then cooled and evaporated. The residue was dissolved in 1N (aq.) NaOH (50 mL) and washed with methylene chloride (2×50 mL). The aqueous layer was then acidified with glacial acetic acid to pH 4 and extracted with methylene chloride (2×100 mL). The organic extracts were dried (brine and MgSO4) and evaporated to give crude product, which was purified by chromatography (CH2Cl2, 0-10% MeOH) to give the desired product as a cream solid (2.10 g, 59% yield). to reflux overnight cooled evaporated The residue was dissolved in 1N (aq.) NaOH (50 mL) washed with methylene chloride (2×50 mL) extracted with methylene chloride (2×100 mL) The organic extracts were dried (brine and MgSO4) evaporated to give crude product, which was purified by chromatography (CH2Cl2, 0-10% MeOH)

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

Procedure: A solution of 4,4-Dimethyl-2-oxo-cyclopentanecarboxylic acid methyl ester (2.08 g, 12.21 mmol) and 5-Chloro-2-fluoro-benzamidine (2.32 g, 13.44 mmol) in 100% ethanol (40 mL) was heated to reflux overnight, then cooled and evaporated. The residue was dissolved in 1N (aq.) NaOH (50 mL) and washed with methylene chloride (2×50 mL). The aqueous layer was then acidified with glacial acetic acid to pH 4 and extracted with methylene chloride (2×100 mL). The organic extracts were dried (brine and MgSO4) and evaporated to give crude product, which was purified by chromatography (CH2Cl2, 0-10% MeOH) to give the desired product as a cream solid (2.10 g, 59% yield). to reflux overnight cooled evaporated The residue was dissolved in 1N (aq.) NaOH (50 mL) washed with methylene chloride (2×50 mL) extracted with methylene chloride (2×100 mL) The organic extracts were dried (brine and MgSO4) evaporated to give crude product, which was purified by chromatography (CH2Cl2, 0-10% MeOH)

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

Procedure: A solution of 4,4-Dimethyl-2-oxo-cyclopentanecarboxylic acid methyl ester (2.08 g, 12.21 mmol) and 5-Chloro-2-fluoro-benzamidine (2.32 g, 13.44 mmol) in 100% ethanol (40 mL) was heated to reflux overnight, then cooled and evaporated. The residue was dissolved in 1N (aq.) NaOH (50 mL) and washed with methylene chloride (2×50 mL). The aqueous layer was then acidified with glacial acetic acid to pH4 and extracted with methylene chloride (2×100 mL). The organic extracts were dried (brine and MgSO4) and evaporated to give crude product, purified by chromatography (CH2Cl2, 0-10% MeOH) to give the desired product as a cream solid (2.10 g, 59% yield). to reflux overnight cooled evaporated The residue was dissolved in 1N (aq.) NaOH (50 mL) washed with methylene chloride (2×50 mL) extracted with methylene chloride (2×100 mL) The organic extracts were dried (brine and MgSO4) evaporated to give crude product purified by chromatography (CH2Cl2, 0-10% MeOH)

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

Procedure: A solution of 4,4-Dimethyl-2-oxo-cyclopentanecarboxylic acid methyl ester (2.08 g, 12.21 mmol) and 5-Chloro-2-fluoro-benzamidine (2.32 g, 13.44 mmol) in 100% ethanol (40 mL) was heated to reflux overnight, then cooled and evaporated. The residue was dissolved in 1N (aq.) NaOH (50 mL) and washed with methylene chloride (2×50 mL). The aqueous layer was then acidified with glacial acetic acid to pH 4 and extracted with methylene chloride (2×100 mL). The organic extracts were dried (brine and MgSO4) and evaporated to give crude product, which was purified by chromatography (CH2Cl2, 0-10% MeOH) to give the desired product as a cream solid (2.10 g, 59% yield). to reflux overnight cooled evaporated The residue was dissolved in 1N (aq.) NaOH (50 mL) washed with methylene chloride (2×50 mL) extracted with methylene chloride (2×100 mL) The organic extracts were dried (brine and MgSO4) evaporated to give crude product, which was purified by chromatography (CH2Cl2, 0-10% MeOH)