Tributylphosphine → 6-{4-[3-(2,6-Dichloro-phenyl)-5-isopropyl-isoxazol-4-ylmethoxy]-2-methoxy-phenyl}-1-isopropyl-2-methyl-1h-indole-3-carboxylic acid ethyl ester

Participants

Reaction Steps

[3-(2,6-Dichloro-phenyl)-5-isopropyl-isoxazol-4-yl]-methanol (0.2 g, 0.71 mmol), 1-isopropyl-6-(4-hydroxy-2-methyl-phenyl)-2-methyl-1H-indole-3-carboxylic acid methyl ester (0.2 g, 0.59 mmol), tri-n-butylphosphine (0.14 g, 0.71 mmol) and azodicarboxylic acid dipiperidide (0.18 g, 0.71 mmol) are stirred in dry toluene (9 mL) for 2 days at room temperature. The reaction is diluted with hexane (9 mL), stirred for 30 minutes, and filtered. The filtrate is concentrated and the residue purified via flash chromatography (40 g SiO2) eluting with 30% THF in heptane to afford the title compound (124 mg, 34.6%). ES/MS m/e 606.8 (M+1)

Provenance & Evidence