rac-[(4S*,5R*)-2-(2-tert-butyl-4-ethoxy-pyrimidin-5-yl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazol-1-yl]-{4-[2-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethyl]-piperazin-1-yl}-methanone → [2-(2-Tert-butyl-4-ethoxy-pyrimidin-5-yl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazol-1-yl]-[4-((r)-3,4-dihydroxy-butyl)-piperazin-1-yl]-methanone

Participants

Reaction Steps

To a solution of rac-[(4S*,5R*)-2-(2-tert-butyl-4-ethoxy-pyrimidin-5-yl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazol-1-yl]-{4-[2-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethyl]-piperazin-1-yl}-methanone (30 mg) in tetrahydrofuran (1 mL) was added 10 drops of trifluoroacetic acid. The mixture was stirred at room temperature for 2 d and concentrated. Purification of the crude residue by reversed phase HPLC (C18-silica gel, eluting with water and acetonitrile) gave the title compound as white solids (6.6 mg). HR-MS (ES, m/z) calculated for C36H47N6O4Cl2 [(M+H)+] 697.3031, observed 697.3027.

Provenance & Evidence