{1-(4-Chlorobenzyl)-2-[4-(6-iodothieno[3,2-d]pyrimidin-4-yl)-piperazin-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester → {1-(4-Chlorobenzyl)-2-[4-(6-cyanothieno[3,2-d]pyrimidin-4-yl)-piperazin-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester

Participants

Reaction Steps

To a solution of {1-(4-chlorobenzyl)-2-[4-(6-iodothieno[3,2-d]pyrimidin-4-yl)-piperazin-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester (50 mg, 0.080 mmol) in Pyridine (5 mL) was added CuCN (20 mg, 0.223 mmol). The mixture was refluxed under N2 for 12 hours. The solvent was removed and the residue was subject to chromatography on silica gel to afford {1-(4-chlorobenzyl)-2-[4-(6-cyanothieno[3,2-d]pyrimidin-4-yl)-piperazin-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester (29 mg, 69%). 1H NMR (CDCl3, 400 Hz) δ 8.65 (s, 1H), 7.95 (s, 1H), 7.28-7.26 (d, J=7.6 Hz, 2H), 7.18-7.16 (d, J=8.4 Hz, 2H). 5.35-5.33 (d, J=8.4 Hz, 1H), 4.85-4.80 (m, 1H), 3.91-3.56 (m, 7H, 3.24-3.19 (m, 1H), 3.01-2.99 (d, J=8.0 Hz, 2H), 1.44 (s, 9H). MS (ESI+) [M+H]+ 527.

Provenance & Evidence