Imidazole → HCID 57496388, compound

Participants

Reaction Steps

A mixture of 6 (647 mg, 2.9 mmol), NaH (232 mg, 5.8 mmol, 60% in mineral oil), imidazole (26 mg, 0.3 mmol) in THF (30 mL) was stirred for a half an hour at room temperature before CS2 (2 mL, 33.3 mmol) was introduced. After stirring for 1 h, iodomethane (0.3 mL, 4.8 mmol) was added. The resultant reaction mixture was stirred for another hour, poured into water (30 mL), extracted with EtOAc two times. The combined organic layers were washed with water and brine, dried over Na2SO4, filtered, and concentrated in vacuo to give a yellow oil. The residue was dissolved in toluene (30 mL), to which catalytic AIBN (100 mg) was added. The reaction mixture was refluxed under N2 while a solution of Bu3SnH (3 mL, 11 mmol) in toluene (3 mL) was added slowly over 30 minutes. After refluxing overnight, the reaction mixture was cooled, partitioned between saturated NaHCO3 aqueous solution and EtOAc. The combined organic layers were washed with water and brine, dried over Na2SO4. The solvent was removed in vacuo and the residue was purified by silica gel column (PE:EA=20:1) to afford 0.32 g of 7 (yield 53%).

Provenance & Evidence