Cesium carbonate → 9-(4-cyclopropylpiperazin-1-yl)-6-(4-methoxybenzyl)pyrido[3,2-e][1,2,4]triazolo[1,5-c]pyrimidin-5(6H)-one

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Reaction Conditions

Reaction Steps

9-Bromo-6-(4-methoxybenzyl)pyrido[3,2-e][1,2,4]triazolo[1,5-c]pyrimidin-5(6H)-one (Example 1, 63 mg, 0.16 mmol) and 1-cyclopropylpiperazine (103 mg, 0.82 mmol) were dissolved in toluene (2 mL) and nitrogen was bubbled through the mixture while BINAP (41 mg, 0.07 mmol), Cs2CO3 (159 mg, 0.49 mmol) and Pd(OAc)2 (7 mg, 0.03 mmol) were added. The mixture was heated at 100° C. for 16 h. The reaction mixture was concentrated under a stream of nitrogen and the residue was taken up in DMF and filtered. Purification (preparative HPLC, 10-70% ACN in water) afforded the title compound (25 mg, 27%) as a yellow solid. 1H NMR (400 MHz, CDCl3) δ 0.84-1.00 (m, 2H), 1.38 (d, J=3.01 Hz, 2H), 2.01 (s, 2H), 2.35-2.51 (m, 1H), 3.50 (s, 4H), 3.61 (br s, 4H), 3.76 (s, 3H), 5.70 (s, 2H), 6.82 (d, J=8.53 Hz, 2H), 7.57 (d, J=8.41 Hz, 2H), 8.07 (d, J=2.89 Hz, 1H), 8.33 (s, 1H), 8.47 (d, J=2.89 Hz, 1H). [M+H]=432.2.

Provenance & Evidence