Dicyclohexylcarbodiimide → (2,5-Dimethoxy-phenylamino)-phenyl-acetic acid (R)-(1-aza-bicyclo[2.2.2]oct-3-yl)ester

Participants

Reaction Steps

PS-DCC (715 mg, 0.951 mmol, loading: 1.33 mmol/g) is suspended in dry THF (10 mL). (2,5-Dimethoxy-phenylamino)-phenyl-acetic acid hydrochloride (I54) (154 mg, 0.48 mmol), HOBT (146 mg, 0.95 mmol) and (R)-quinuclidin-3-ol (181 mg, 1.43 mmol) are added and the mixture is shaken at RT overnight. PS-DCC is filtered off and the filtrate is evaporated. The residue is dissolved in EtOAc and washed with sat. NaHCO3, water and brine. The organic layer is dried over Na2SO4, filtered and evaporated to dryness. The crude compound is purified by flash chromatography (DCM/MeOH=95/5) to achieve the title compound as a colorless oil (108 mg, 57% yield, mixture of diastereoisomers).

Provenance & Evidence