Diisopropylethylamine → 4-[4-(5-Bromo-[1,2,4]triazolo[1,5-a]pyrazin-8-ylamino)-phenyl]-3-oxo-piperazine-1-carboxylic acid tert-butyl ester

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Reaction Steps

This compound may be prepared using methods as described for Compound 6, step 1, using 5,8-dibromo-[1,2,4]triazolo[1,5-a]pyrazine (0.283 g, 1.00 mmol), 4-(4-amino-phenyl)-3-oxo-piperazine-1-carboxylic acid ter-t-butyl ester (0.300 g, 1.00 mmol) and N-ethyldiisopropyl-amine (0.20 mL, 1.02 mmol) in 2-propanol (1 mL). Purification of the crude material by silica gel column chromatography eluting with DCM followed by 98:2 DCM:MeOH affords 4-[4-(5-bromo-[1,2,4]triazolo[1,5-a]pyrazin-8-ylamino)-phenyl]-3-oxo-piperazine-1-carboxylic acid tert-butyl ester as a white solid (0.252 g, 51%).

Provenance & Evidence