3,5-Dimethyl-4-Isoxazolecarbaldehyde → 5-[4-(3,5-Dimethyl-isoxazol-4-ylmethyl)-piperazin-1-yl]-2-(3-fluoro-phenyl)-[1,2,4]triazolo[1,5-a][1,3,5]triazin-7-ylamine

Participants

Reaction Steps

2-(3Fluoro-phenyl)-5-piperazin-1-yl-[1,2,4]triazolo[1,5-a][1,3,5]triazin-7-ylamine (0.15 mmol) was dissolved in 4 mL of CH2Cl2 along with 2 eq. of 3,5-dimethyl-isoxazole-4-carbaldehyde and 25 mL of glacial acetic acid. The reaction mixture was stirred at room temperature for 30 minutes and sodium triacetoxyborohydride (4 eq.) was added in a single portion. The resulting reaction mixture was then stirred at room temperature for 18 hours. It was then concentrated under a stream of N2 and purified by preparative HPLC using a mixture of aqueous CH3CN that has been buffered with 0.1% TFA. 1H NMR (DMSO-d6) δ 6.9-7.25 (m, 3 H), 3.8 (br s, 2H), 2.2-3.2 (m, 8H), 1.6 (br s, 6H). MS: m/z: 424 [M+H]+.

Provenance & Evidence