rel-(2R,6S)-2,6-dimethylpiperazine → HCID 178489798, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

(2S,6R)-2,6-Dimethylpiperazine (228 mg, 2.00 mmol) was added in one portion to 5-chloro-N-[5-[2-(3,5-dimethoxyphenyl)ethyl]-2H-pyrazol-3-yl]pyrazine-2-carboxamide (388 mg, 1.00 mmol) in anhydrous dimethylsulfoxide (1.00 ml) at 25° C. The resulting solution was stirred at 100° C. for 18 h. The crude product was purified by ion exchange chromatography, using an SCX column. The desired product was eluted from the column using 7M NH3/MeOH to afford impure material. The concentrated eluent was purified by preparative HPLC, using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the title compound (164 mg, 35%) as a cream solid.

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