Tributylphosphine → {2-Chloro-4-[3-(4-chloro-phenylethynyl)-5-(1-methyl-piperidin-4-ylmethoxy)-phenylsulfanyl]-phenoxy}-acetic acid ethyl ester

Participants

Reaction Steps

{2-Chloro-4-[3-(4-chloro-phenylethynyl)-5-hydroxyl-phenylsulfanyl]-phenoxy}-acetic acid ethyl ester (274 mg; 0.58 mmol) was dissolved in THF (15 mL) in a dried reaction flask under an atmosphere of nitrogen. 1-(Methyl-piperidin-4-yl)-methanol (100 mg; 0.48 mmol) and tributylphosphine (0.21 mL; 0.87 mmol) were added followed by 1,1′-(Azodicarbonyl)dipiperidine (0.22 g; 0.87 mmol) dissolved in THF (10 mL). The reaction mixture was stirred at room temperature for 5 h, filtered, and evaporated in vacuo. The crude product was purified by prep. HPLC (method B). Yield: 250 mg. HPLC-MS: m/z: 663.0 (M+H); Rt: 2.47 min.

Provenance & Evidence