fragments have been synthesized. A hypothesis was proposed that closure of the pyrrole ring in the presence of alumina nanoparticles may proceed through 1,4-addition of nitroethane to the chalcone podand to give the Michael adduct rather than through an iminium intermediate usually observed in the reactions of α,β-unsaturated ketones (chalcones) in the presence of Lewis acids. Moderate tuberculostatic
已经合成了含有
吡咯或
吡唑啉片段的新豆荚。提出了一种假设,即在氧化铝纳米粒子存在下,
吡咯环的封闭可以通过将1,4-
硝基乙烷添加到
查尔酮豆荚中而形成迈克尔加合物,而不是通过通常在α,β反应中观察到的
亚胺中间体来进行。
路易斯酸存在下的不饱和酮(
查耳酮)。发现最初的
查尔酮荚足具有适度的结核抑制活性。在随后对
查耳酮片段进行修饰以给出五元杂环时发现了更大的此类活性。
吡咯衍
生物在所获得的杂芳基podand中显示出最大的活性。