Transition-Metal-Free Access to Primary Anilines from Boronic Acids and a Common <sup>+</sup>NH<sub>2</sub> Equivalent.
作者:Samantha Voth、Joshua W. Hollett、J. Adam McCubbin
DOI:10.1021/jo5025078
日期:2015.3.6
are obtained at refluxing temperatures. Our method is also amenable to electrophilicamination of several common boronic acid derivatives (e.g., pinacol esters). We demonstrate that it can be combined with metal–halogen exchange reactions or a variety of directed ortho metalation protocols in a “one-pot” sequence for the synthesis of aromatic amines with unique substitution patterns. DFT studies, in
A one-pot I2-mediated annulation reaction of substrates containing diamino groups and aldehydes has been developed viaoxidativeC–Nbondformation. This general and environmentally benign synthetic approach provides facile access to a variety of 1,3-diazaheterocyclic compounds, including quinazolinones, benzimidazoles, and cyclic amidines.
anilinic amino group of metal carbene species generated, via the use of Rh2(esp)2 catalyst, from the hitherto poorly explored α‐diazo‐γ‐butyrolactams. The reaction works well for aromatic and heteroaromatic (but not aliphatic) amines.
Synthesis of Isoindolo[2,1-<i>a</i>]quinazoline Derivatives in Ionic Liquid Catalyzed by Iodine
作者:Lian Lu、Ke Yang、Mei-Mei Zhang、Xiang-Shan Wang
DOI:10.1002/jhet.1696
日期:2014.5
A mild, green, and facile method for the synthesis of 6,6a‐dihydroisoindolo[2,1‐a]quinazoline‐5,11‐dione derivatives is described in high yields using ionicliquids as green media. The method involves the reaction of 2‐aminobenzamides with 2‐formylbenzoic acid catalyzed by iodine and provides a new alkaloid library with potential activity for biomedical screening.
An efficient and versatile mechanochemical route for the synthesis of chromene and isoindolo[2,1- a ]quinazoline scaffolds has been developed via a simple mortar and pestle liquid-assisted grinding method using 2,2,2-trifluoroethanol (TFE) as an efficient catalyst. The present protocol is very efficient as it offers reaction in mild reaction condition, cleaner reaction profiles, effortless work-up
通过使用2,2,2-三氟乙醇(TFE)作为简单的研钵和研杵液体辅助研磨方法,已经开发了一种用于合成色烯和异吲哚并[2,1- a ]喹唑啉支架的有效且通用的机械化学路线。 催化剂。本方案非常有效,因为它可以在温和的反应条件下提供反应,反应曲线更干净,纯化步骤轻松,纯度高,反应时间短,所需产物的收率高。