Lithium hydroxide, monohydrate → 2-(2-Carboxy-2-(4-(triisopropylsilyloxy)phenyl)ethylcarbamoyl)benzoic acid

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Reaction Steps

To methyl 3-(1,3-dioxoisoindolin-2-yl)-2-(4-(triisopropylsilyloxy)phenyl)propanoate (E3) in THF/H2O was added LiOH.H2O, and the solution was stirred for 1.5 h or until conversion to product was visible by LC-MS. The solution was then poured into EtOAc/NH4Cl(sat)/1 N HCl (3:1), and the aqueous layer was further extracted with EtOAc. The organics were dried (Na2SO4), filtered, evaporated, and dried to give crude 2-(2-carboxy-2-(4-(triisopropylsilyloxy)phenyl)ethylcarbamoyl)benzoic acid (E4).

Provenance & Evidence