Triethylamine → HCID 86666738, compound

Participants

Reaction Steps

1,1-dimethylethyl hydrazinecarboxylate (2.59 g, 19.58 mmol) and triethylamine (2.98 mL, 21.36 mmol) were dissolved in Dichloromethane (DCM) (50 mL). 5-chloro-2-pyrazinecarbonyl chloride (I47) (3.15 g, 17.80 mmol) dissolved in Dichloromethane (DCM) (50 mL) was added dropwise at 0° C. and the mixture allowed to reach room temperature over 16 hr. Solvents were removed in vacuo and the residue was partitioned between ethyl acetate (100 mL) and saturated sodium bicarbonate solution (50 mL). The aqueous phase was extracted with ethyl acetate (3×100 mL), combined extracts were washed with brine (100 mL) dried over anhydrous sodium sulfate and concentrated to a crude solid (5.05 g). The product was purified by flash chromatography (Isolera, 100 g, 0-100% Methanol:Dichloromethane (1:9)/Dichloromethane) to afford product in 4.63 g.

Provenance & Evidence