HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 592833Generated: October 30, 2026
Diisopropylethylamine → tert-Butyl 4-(5-(6-Bromo-4-methyl-3-oxo-3,4-dihydropyrazin-2-ylamino)pyridin-2-yl)piperazine-1-carboxylate
https://huagongshe.com/reaction/592833
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Diisopropylethylamine | HCID 81531 | — |
| Reactant | 3,5-Dibromo-1-methyl-1H-pyrazin-2-one | HCID 13062969 | — |
| Reactant | tert-Butyl 4-(5-aminopyridin-2-yl)piperazine-1-carboxylate | HCID 17999304 | — |
| Solvent | Isopropanol | HCID 3776 | — |
| Product | tert-Butyl 4-(5-(6-Bromo-4-methyl-3-oxo-3,4-dihydropyrazin-2-ylamino)pyridin-2-yl)piperazine-1-carboxylate | HCID 86684363 | 45% |
Reaction Steps
A mixture of 197b (500 mg, 1.8 mmol), 3,5-dibromo-1-methylpyrazin-2(1H)-one (530 mg, 2.0 mmol), N-ethyl-N-isopropylpropan-2-amine (1.5 mL, 0.90 mmol), and propan-2-ol (20 mL) was stirred at 100° C. for 15 h. After the reaction was completed, the solvent was removed under reduced pressure to afford 197c as a brown solid (375 mg, 45%). MS-ESI: [M+H]+ 465.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US09238655B2 |
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| Source dataset | uspto-grants-2016_01 |
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| ORD ID | ord-751ff959ca58407fac601b8e05e087dd |
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| Source note | uspto-grants-2016_01 |
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