1,1'-Carbonyldiimidazole → (R)-3-[2,2-Bis-(2-chloro-phenyl)-2-hydroxy-acetoxy]-1-(isoxazol-3-ylcarbamoylmethyl)-1-azonia-bicyclo[2.2.2]octane bromide

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of bis-(2-chloro-phenyl)-hydroxy-acetic acid (0.17 g, 0.572 mmol) in dry DMF (3 ml) under an inert atmosphere of Argon is added CDI (0.097 g, 0.6 mmol). After 1 hour, (R)-3-hydroxy-1-(isoxazol-3-ylcarbamoylmethyl)-1-azonia-bicyclo[2.2.2]octane bromide (Intermediate A) (0.2 g, 0.602 mmol) is added and the reaction mixture is heated to 40° C. overnight. Purification using C-18 reverse phase column chromatography (eluent: water-acetonitrile) affords a solid which is triturated with diethyl ether to yield the titled compound as a crystalline solid.

Provenance & Evidence