Synthesis and isolation of bromo-β-carbolines obtained by bromination of β-carboline alkaloids
作者:María A. Ponce、Rosa Erra-Balsells
DOI:10.1002/jhet.5570380512
日期:2001.9
2c, 2d, 2e are reported (mp, Rf, 1H-nmr, 13C-nmr and ms) together with the preparation, isolation and charaterization, for the first time, of the bromoderivatives obtained from harmine (3a-3e), harmol (4a, 4b) and 7-acetylharmol (5a-5c). As brominating reagent N-bromosuccinimide and N-bromosuccinimide-silica gel in dichloromethane and in chloroform as well as the β-carboline - N-bomosuccinimide solid
在不同的实验条件下,β-咔啉(1-5)会被N-溴代琥珀酰亚胺进行亲电芳香取代。尽管前段时间通过溴化正六烷(1)溴化获得的6-溴-正六烷(1a)已被分离并完全表征,但正六烷(1b-1e)和harmane(2a-2e)的其他溴代衍生物部分被描述为反应混合物的一部分。报告了1b,1c,1d,1e,2a,2b,2c,2d,2e的制备以及随后的分离,纯化和完整表征(mp,R f,1 H-nmr,13C-nmr和ms)以及从harmine(3a-3e),harmol(4a,4b)和7-乙酰基harmol (5a-5c)获得的溴代衍生物的首次制备,分离和表征。作为溴化剂Ñ溴代琥珀酰亚胺和Ñ溴代琥珀酰亚胺硅胶在二氯甲烷和氯仿中,以及在β咔啉- ñ -bomosuccinimide固体混合物已被用于和其用途进行了比较。进行了半经验的AMI和PM3计算,以便根据HOMO的能量,HOMO-LUMO的差异以及β-