2,4,6-Trimethylpyridine → (S)-tert-butyl 5-((S)-1-(4-chloro-2-fluorophenyl)-2-(4-((5R,7R)-7-hydroxy-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)piperazin-1-yl)-2-oxoethyl)-2,2-dimethylpyrrolidine-1-carboxylate

Participants

Reaction Steps

(5R,7R)-5-Methyl-4-(piperazin-1-yl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-7-ol dihydrochloride (0.109 g, 0.356 mmol; see Example 3, Step 12), HATU (0.123 g, 0.324 mmol), and collidine (0.171 mL, 1.30 mmol) were added to a solution of (S)-2-((S)-1-(tert-butoxycarbonyl)-5,5-dimethylpyrrolidin-2-yl)-2-(4-chloro-2-fluorophenyl)acetic acid (0.125 g, 0.324 mmol; prepared analogously to that described in Example B) in DCM (25 mL). The reaction was stirred overnight at room temperature. The reaction was partitioned between water (20 mL) and DCM (50 mL), and the layers were separated. The organics were washed with water (2×10 mL). The aqueous portion was back extracted with DCM (25 mL), dried (MgSO4) and concentrated to an oil that was purified by flash chromatography (5% MeOH/DCM) to give (S)-tert-butyl 5-((S)-1-(4-chloro-2-fluorophenyl)-2-(4-((5R,7R)-7-hydroxy-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)piperazin-1-yl)-2-oxoethyl)-2,2-dimethylpyrrolidine-1-carboxylate (0.116 g, 0.193 mmol, 59.5% yield). LC/MS=3.79 minutes, (APCI+) m/z=602 [M+H]+.

Provenance & Evidence