Trifluoromethanesulfonic anhydride → HCID 21193368, compound

Participants

Reaction Steps

To 1-trityl-4-(4-Cyanobenzyl)-imidazole (1.99 g, 4.64 mmol) in CH2Cl2 (9.3 mL), Hunigs base (1.62 mL, 9.28 mmol) and the product from step B (1.0 g 4.64 mmol) at −78° C. was added trifluoromethanesulfonic anhydride (0.78 mL, 4.64 mmol). After 45minutes the reaction was allowed to warm to room temperature. The solvent was evaporated and the residue was dissolved in methanol (50 ml) and heated at reflux for 1 hour, cooled and evaporated to dryness. The residue was partitioned between sat. aq. NaHCO3 solution and CH2Cl2. The organic layer was dried, (MgSO4) and the solvent evaporated in vacuo. The residue was chromatographed (Silica gel, 3% MeOH in CH2Cl2) to afford the title compound.

Provenance & Evidence