Facile Entry to Ethyl Tetrahydro-1H-pyrrolizin-7a(5H)-ylacetate: a Versatile Pharmaceutical Intermediate
作者:Giovanni Lentini、Claudio Bruno、Alessia Catalano、Alessia Carocci、Carlo Franchini、Vincenzo Tortorella
DOI:10.3987/com-08-11369
日期:——
An improved synthesis of ethyl tetrahydro-1H-pyrrolizin-7a(5H)-ylacetate is reported. This valuable pharmaceutical intermediate was easily obtained from 1,7-diiodo-4-heptanone in 46% yield, thus improving the procedure reported in the literature (23% yield) which starts from l,7-dichloro-4-heptanone. Moreover, 1,7-diiodo-4-heptanone was obtained as an easily manageable solid, in this being preferable
报道了一种改进的四氢-1H-吡咯嗪-7a(5H)-醋酸乙酯合成方法。这种有价值的医药中间体很容易从 1,7-二碘-4-庚酮中以 46% 的收率获得,从而改进了文献中报道的从 1,7-二氯-4-庚酮开始的程序(收率 23%)。此外,1,7-二碘-4-庚酮作为一种易于处理的固体获得,这优于它的 1,7-二氯同系物,后者是一种非常不稳定的油。前者从市售的 4-氧代庚二酸二乙酯开始以高总产率 (75%) 合成,从而克服了与使用 γ-丁内酯相关的众所周知的问题。