Triphenylphosphine → 4-[3-Cyano-5-(thiophen-2-ylmethyloxy)indol-1-yl]benzoic acid ethyl ester

Participants

Reaction Steps

To a solution of 4-(5-hydroxy-3-cyanoindol-1-yl)benzoic acid ethyl ester and thiophene-2-methanol (0.057 g) and triphenylphosphine (0.012 g) in tetrahydrofuran (2.5 mL) was added diisopropylcarbodiimide (40% toluene solution, 0.18 mL) at room temperature, and this mixture was stirred for 3 hours. This reaction mixture was concentrated under reduced pressure. This residue was purified by column chromatography on silica gel (eluent: ethyl acetate/n-hexane=1/3) to give the title compound (0.10 g).

Provenance & Evidence