Phenylacetylene → (S)-2-(1-(6-amino-5-(phenylethynyl)pyrimidin-4-ylamino)ethyl)-5-chloro-3-phenylquinazolin-4(3H)-one

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Reaction Conditions

Reaction Steps

To (S)-2-(1-(6-amino-5-iodopyrimidin-4-ylamino)ethyl)-5-chloro-3-phenylquinazolin-4(3H)-one (58 mg, 0.11 mmol) (prepared according to the procedure in Example 5A) in THF (5 mL) was added Pd(PPh3)2Cl2 (2 mg, 2.5%), CuI (1 mg, 5%), TEA (0.1 mL, 0.16 mmol), and phenylacetylene (20 mg 0.16 mmol). After stirring at 70° C. for 2 hours, the solvent was stripped. The residue was purified on silica with 0 to 10% MeOH in DCM to give material that required further purification. Purification on silica with 0 to 100% EtOAc in hexanes gave (S)-2-(1-(6-amino-5-(phenylethynyl)pyrimidin-4-ylamino)ethyl)-5-chloro-3-phenylquinazolin-4(3H)-one. 1H NMR (400 MHz, DMSO-D6) δ7.88 (s, 1H), 7.78 (t, J=8.0 Hz, 1H), 7.88 (dt, J=6.8, 1.6 Hz, 2H), 7.59-7.41 (m, 10H), 6.92 (d, J=7.0 Hz, 1H), 6.75 (bs, 2H), 4.73 (p, J=6.8 Hz, 1H), 1.35 (d, J=6.7 Hz, 3H). ES/MS m/z=493.1 (M+H+).

Provenance & Evidence