Acetic Acid → 2-((Thiophen-2-ylmethylamino)methyl)-7,8-dihydro-3H-pyrano[4,3-d]pyrimidin-4(5H)-one

Participants

Reaction Steps

A mixture of thiophene-2-carbaldehyde (0.021 mL, 0.22 mmol), 2-aminomethyl-3,5,7,8-tetrahydro-pyrano[4,3-d]pyrimidin-4-one (40 mg, 0.22 mmol), and siliabond cyanoborohydride (240 mg, 0.24 mmol, 1 mmol/g) in ethanol (1 mL) was stirred at ambient temperature for 10 minutes. Acetic acid (0.013 mL, 0.22 mmol) was then added, and the mixture was stirred at ambient temperature for another 5 minutes. The reaction mixture was concentrated in vacuo and purified via flash column chromatography (ethyl acetate:hexane, 10:90 to 100:0, methanol: dichloromethane, 1:99 to 10:90) to provide the title compound (30 mg, 49% yield). m/z 278.1 (M+1), retention time=0.89 min.

Provenance & Evidence