1-Methylpiperazine → HCID 56644017, compound

Participants

Reaction Steps

(S)-2-(6-(4-Chlorophenyl)-8-(4-formylphenyl)-1-methyl-4H-benzo[f][1,2,4]triazolo[4,3-a][1,4]diazepin-4-yl)-N-ethylacetamide (for a preparation see Intermediate 6) (90 mg) was dissolved in DCM (5 ml). 1-Methylpiperazine (30 μl) and acetic acid (10.35 μl) were added and the reaction mixture was stirred for 5 min. Sodium triacetoxyborohydride (192 mg) was added and the reaction mixture was stirred at room temperature, under nitrogen, over the weekend. Saturated sodium hydrogen carbonate solution (5 ml) was added and the reaction mixture was stirred for 10 min. The organic phase was separated and the saturated sodium hydrogen carbonate solution was extracted with DCM (10 ml). The DCM extracts were combined, dried and the solvent was evaporated. The residue was chromatographed (0-15% methanol:DCM), triturated with diethyl ether and dried in a vacuum dessicator at 40° C. overnight to give (S)-2-(6-(4-chlorophenyl)-1-methyl-8-(4-((4-methylpiperazin-1-yl)methyl)phenyl)-4H-benzo[f][1,2,4]triazolo[4,3-a][1,4]diazepin-4-yl)-N-ethylacetamide (66.5 mg) as a white solid. LCMS (formate): MH+ 582, RT 0.65 min

Provenance & Evidence