Cesium carbonate → HCID 88006679, compound

Participants

Reaction Steps

A suspension of compound 47 (0.162 g, 0.250 mmol), toluene-4-sulfonic acid 3-isobutyl-5-oxo-tetrahydro-furan-2-ylmethyl ester (0.0815 g, 0.250 mmol) and cesium carbonate (0.098 g, 0.300 mmol) in DMF 5.0 ml) was stirred at room temperature for 24 h. The reaction mixture was washed with water and the organic layer extracted into ethyl acetate/hexane (3×20 ml, 1:1). The combine extracts were washed with brine, dried (MgSO4) and the solvent removed in vacuo. The residues were purified by column chromatography [silica gel, hexane/ethyl acetate (9:1)] to yield a colorless solid, which was recrystallized from acetonitrile.

Provenance & Evidence