71257-38-0

基本信息
1H,2H,3H,4H-吡咯并[1,2-A]吡嗪
1H,2H,3H,4H-pyrrolo[1,2-a]pyrazine
pyrrolo[1,2-a]pyrazine, 1,2,3,4-tetrahydro-
Pyrrolo[1,2-a]pyrazine, 1,2,3,4-tetrahydro- (9CI)
1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazine(SALTDATA: FREE)
物理化學性質(zhì)
常見問題列表

29709-35-1

50-00-0
![1,2,3,4-四氫吡咯并[1,2-A]吡嗪](/CAS/GIF/71257-38-0.gif)
71257-38-0
以2-(1H-吡咯-1-基)乙胺和甲醛為原料合成1,2,3,4-四氫吡咯并[1,2-a]吡嗪的一般步驟:將2-(1H-吡咯-1-基)乙胺(2g,18mmol)溶于40mL乙醇中,隨后加入40%甲醛水溶液(1.5mL,18mmol),并緩慢滴加1mL三氟乙酸。將反應(yīng)混合物加熱至50℃,維持15分鐘,然后冷卻至室溫并持續(xù)攪拌12小時。反應(yīng)完成后,通過減壓濃縮去除溶劑,加入50mL乙酸乙酯進行稀釋,用50mL飽和碳酸氫鈉溶液洗滌有機相,隨后用無水硫酸鈉干燥并過濾。最后,通過減壓濃縮濾液,得到1,2,3,4-四氫吡咯并[1,2-a]吡嗪(1.60g,收率72.7%),產(chǎn)物為淺黃色油狀物。
參考文獻:
[1] Patent: EP2604610, 2013, A1. Location in patent: Paragraph 0082; 0084
[2] Patent: US2013/131068, 2013, A1. Location in patent: Paragraph 0105
[3] Patent: US2008/153843, 2008, A1. Location in patent: Page/Page column 75
[4] Patent: CN108250128, 2018, A. Location in patent: Paragraph 0787; 0789; 0792; 0793
[5] Patent: US2009/186899, 2009, A1. Location in patent: Page/Page column 37; 41