1,1'-Carbonyldiimidazole → HCID 67019329, compound

Participants

Reaction Steps

A mixture comprising N-{(3aR,4S,6R,6aS)-6-[2-((R)-3-amino-pyrrolidin-1-yl)-6-(2,2-diphenyl-ethylamino)-purin-9-yl]-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-yl}-propionamide (see preparation of intermediates) (0.24 g, 0.39 mmol) and CDI (0.275 g, 1.7 mmol) in DCM is stirred at room temperature for 3 hours. Purification of the resulting mixture by chromatography on silica eluting with 0-5% MeOH in DCM yields the titled compound as a yellow oil. The compound exists as a mixture of the imidazole-urea intermediate together with variable amounts of the corresponding isocyanate and imidazole which are equally suitable as precursors to ureas.

Provenance & Evidence