Potassium Carbonate → HCID 57424226, compound

Participants

Reaction Steps

A solution of 2,2,4,4-tetramethyl-6-trimethylsilanylethynylchroman-8-carboxylic acid isopropyl ester (Intermediate 43, 0.23 g, 0.62 mmol) in methanol (5 mL) was treated with potassium carbonate (0.85 g, 6.2 mmol) and the resulting reaction mixture was stirred at ambient temperature overnight. The solvent was evaporated in vacuo, the residue was diluted with water and extracted with diethyl ether. The organic phase was washed with brine, dried over anhydrous magnesium sulfate, filtered and evaporated in vacuo to a brown oil that was subjected to flash column chromatography over silica gel (230-400 mesh) using 20% ethyl acetate in hexane as the eluent to afford the title compound (0.0246 g, 13%).

Provenance & Evidence