Acetic Acid → HCID 69739503, compound

Participants

Reaction Steps

Phthalic dicarboxaldehyde (52 mg, 0.36 mmol) was dissolved in a mixture of anhydrous acetonitrile (2 ml) and acetic acid (44 μl, 0.72 mmol). The above 2-amino-5-aminomethyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester (0.11 g, 0.36 mmol) was added and the reaction stirred for 20 minutes at room temperature. The volatiles were evaporated in vacuo and the residue dissolved in ethyl acetate (25 ml). The organic mixture was washed with saturated sodium bicarbonate (5 ml), 1% hydrochloric acid (5 ml), brine (5 ml), dried (Na2SO4), filtered and evaporated in vacuo. The residue was purified by chromatography using a gradient from 15% ethyl acetateldichloromethane to 17% ethyl acetate/dichloromethane as eluent affording 45 mg (30%) of 2-amino-5-(1-oxo-1,3-dihydro-isoindol-2-ylmethyl)-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester as a solid.

Provenance & Evidence