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。
Incorporating Morpholine and Oxetane into Benzimidazolequinone Antitumor Agents: The Discovery of 1,4,6,9-Tetramethoxyphenazine from Hydrogen Peroxide and Hydroiodic Acid-Mediated Oxidative Cyclizations
作者:Darren Conboy、Styliana I. Mirallai、Austin Craig、Patrick McArdle、Ali A. Al-Kinani、Stephen Barton、Fawaz Aldabbagh
DOI:10.1021/acs.joc.9b01427
日期:2019.8.2
benzimidazoles or 1,4,6,9-tetramethoxyphenazine in high yield. Mechanisms via a detected nitroso-intermediate are proposed for oxidative cyclization and the unexpected intermolecular displacement of the oxazine. An aqueous solution of molecular iodine is capable of the same transformations. Oxidative demethylation gave targeted benzimidazolequinones, including without cleavage of the incorporated oxetane.
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。
Ring-fused dimethoxybenzimidazole-benzimidazolequinone (DMBBQ): tunable halogenation and quinone formation using NaX/Oxone
作者:Darren Conboy、Patrick Kielty、Joseph C. Bear、Jeremy K. Cockcroft、Pau Farràs、Patrick McArdle、Richard J. Singer、Dennis A. Smith、Fawaz Aldabbagh
DOI:10.1039/d1ob00032b
日期:——
A new one-pot electrophilic chlorination and bromination with oxidative demethylation uses harmless and inexpensive sodium chloride and sodium bromide with Oxone to yield alicyclic ring-fused bis-benzimidazolequinones.