Tricyclohexylphosphine → (S)-tert-Butyl 3-(4-(2-((4-chloro-5-cyclopropyl-2-methoxyphenyl)amino)propanoyl)piperazin-1-yl)azetidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of (S)-tert-butyl 3-(4-(2-((5-bromo-4-chloro-2-methoxyphenyl)amino)propanoyl)piperazin-1-yl)azetidine-1-carboxylate (700 mg, 1.32 mmol), cyclopropylboronic acid (114 mg, 1.32 mmol), Pd(OAc)2 (15 mg, 0.066 mmol), tricyclohexylphosphine (37 mg, 0.132 mmol), K3PO4.3H2O (974 mg, 4.62 mmol) in DMF (10 mL) and H2O (0.5 mL) was stirred under argon at 80° C. for 16 h. The mixture was allowed to cool to RT, and then partitioned between ethyl acetate and water. The organic layer was washed with brine, dried over Na2SO4 and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel (methanol/dichloroethane=1:100) to afford the desired product (400 mg, 62%). ESI-MS m/z: 493.2[M+H]+.

Provenance & Evidence