7-(2-{1-[2-(4-Cyanophenoxy)ethyl]-3,3-dimethylureido}ethyl)-9-oxa-3,7-diazabicyclo[3.3.1]nonane-3-carboxylic acid tert-butyl ester → 1-[2-(4-Cyanophenoxy)ethyl]-3,3-dimethyl-1-[2-(9-oxa-3,7-diazabicyclo[3.3.1]non-3-yl)ethyl]urea

Participants

Reaction Steps

7-(2-{1-[2-(4-Cyanophenoxy)ethyl]-3,3-dimethylureido}ethyl)-9-oxa-3,7-di-azabicyclo[3.3.1]nonane-3-carboxylic acid tert-butyl ester (6.5 g; see Example 5 below) was taken in HCl in dioxane (50 mL) and stirred for 30 min. The reaction mixture was decanted and the solid was taken in a biphasic mixture of dichloromethane and aqueous NaHCO3. The organic layer was separated, washed with water, dried over sodium sulfate and concentrated. Purification by column chromatography yielded 1.3 g of the title compound as pale yellow solid.

Provenance & Evidence