Water → HCID 69338924, compound

Participants

Reaction Conditions

Reaction Steps

(2R)-Acetylamino-2-methyl-4-(5-bromothiophen-2-yl)butyl acetate (1.60 g, 4.59 mmol) obtained in Example 47 (c) was dissolved in dimethylformamide (16 ml), and 5-phenylpent-1-yne (1.99 g, 13.8 mmol), triethylamine (6.40 ml, 45.9 mmol), copper(I) iodide (175 mg, 0.92 mmol), and dichlorobis(triphenylphosphine)palladium (322 mg, 0.46 mmol) were added thereto followed by stirring for 2 hours at 80° C. under a nitrogen atmosphere. The reaction solution was poured into water, extracted with ethyl acetate, and after the ethyl acetate layer was dried over anhydrous magnesium sulfate, the solvent was evaporated in vacuo. The residue was purified by chromatography on a silica gel column (elution solvent; hexane:ethyl acetate=2:1-2:3) to give the title compound (1.41 g, 75% yield).

Provenance & Evidence