Greener synthesis using hydrogen peroxide in ethyl acetate of alicyclic ring-fused benzimidazoles and anti-tumour benzimidazolequinones
作者:Martin Sweeney、Michael Gurry、Lee-Ann J. Keane、Fawaz Aldabbagh
DOI:10.1016/j.tetlet.2017.07.102
日期:2017.9
Environmentally-friendly and cost effective hydrogenperoxide in ethylacetate was used to prepare in high yields pyrrolo[1,2-a]benzimidazoles from commercial o-(pyrrolidin-1-yl)anilines without the requirement for organic-aqueous extraction and chromatography. Six, seven and eight membered ring-fused analogues were similarly obtained in high yields with methanesulfonic acid required for the pyrido[1
使用环境友好且经济高效的乙酸乙酯中的过氧化氢,无需有机水萃取和色谱法即可从商业邻-(吡咯烷基-1-基)苯胺制备高收率的吡咯并[1,2- a ]苯并咪唑。用吡啶[1,2- a ]苯并咪唑所需的甲磺酸,以高收率相似地获得了六,七和八元环稠合的类似物。通过3,6-二甲氧基-2-(环氨基)苯胺的环化,可以高产率获得抗肿瘤苯并咪唑醌衍生物。
Optimisation of 2-(N-phenyl carboxamide) triazolopyrimidine antimalarials with moderate to slow acting erythrocytic stage activity
作者:Brodie L. Bailey、William Nguyen、Anna Ngo、Christopher D. Goodman、Maria R. Gancheva、Paola Favuzza、Laura M. Sanz、Francisco-Javier Gamo、Kym N. Lowes、Geoffrey I. McFadden、Danny W. Wilson、Benoît Laleu、Stephen Brand、Paul F. Jackson、Alan F. Cowman、Brad E. Sleebs
DOI:10.1016/j.bioorg.2021.105244
日期:2021.10
the Janssen Jumpstarter library against the asexual stages of the P. falciparum parasite. Here we describe the structure activity relationship of the identified class and the optimisation of asexual stage activity while maintaining selectivity against the human HepG2 cell line. The most potent analogues from this study were shown to exhibit equipotent activityagainst P. falciparum multidrug resistant
4-fused skeleton. Aldehyde serves as a key to start the whole process, including 1,6-hydride transfer enabled δ-C(sp3)–H activation of the secondary amine. The challenges of construction of medium-sized rings are addressed via hydride transfer chemistry.