Triacetoxyperiodinane → [(R)-2-(3'-chloro-biphenyl-4-yl)-1-formyl-ethyl]-carbamic acid tert-butyl ester

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Reaction Steps

Next, to a solution of [(R)-2-(3′-chloro-biphenyl-4-yl)-1-hydroxymethyl-ethyl]-carbamic acid tert-butyl ester (2.0 g, 5.53 mmol) in DCM (30 mL) is added Dess-Martin periodinane (2.81 g, 6.63 mmol). After being stirred at room temperature for 2 h, the reaction mixture is diluted with EtOAc and washed with saturated NaHCO3 aqueous solution and brine. The organic layer is dried over Na2SO4 and concentrated. The residue is purified by flash column chromatography (silica gel, eluent; heptane/EtOAc=100:0 to 0:100) to give [(R)-2-(3′-chloro-biphenyl-4-yl)-1-formyl-ethyl]-carbamic acid tert-butyl ester (1.05 g). HPLC retention time=1.27 minutes (condition A): MS (m+1)=360.

Provenance & Evidence