Triphenylphosphine → methyl 3-((1S)-2-{[tert-butyl(dimethyl)silyl]oxy}-1-methylethoxy)-5-[4-(methylsulfonyl)phenoxy]benzoate

Beteiligte Stoffe

Reaktionsschritte

(2R)-1-{[tert-Butyl(dimethyl)silyl]oxy}propan-2-ol (2.18 g, 11.47 mmol) was added to a solution of methyl 3-hydroxy-5-[4-(methylsulfonyl)phenoxy]benzoate (2.76 g, 8.57 mmol) in dry DCM (100 mL) followed by addition of polymer-supported triphenylphosphine (3.0 mmol/g (Fluka), 8.57 g, 25.71 mmol) and DIAD (3.37 mL, 17.1 mmol) at RT. The reaction was stirred for 3 h before filtration through diatomaceous earth and evaporation. Purification by column chromatography, eluting with 1:4 to 1:2 ethyl acetate:hexanes, afforded the title compound as a colourless oil (3.70 g, 87%).

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