Facile Synthesis of Unsymmetrical Acridines and Phenazines by a Rh(III)-Catalyzed Amination/Cyclization/Aromatization Cascade
作者:Yajing Lian、Joshua R. Hummel、Robert G. Bergman、Jonathan A. Ellman
DOI:10.1021/ja406131a
日期:2013.8.28
annulations of aromatic azides with aromatic imines and azobenzenes to give acridines and phenazines, respectively. These transformations proceed through a cascade process of Rh(III)-catalyzed amination followed by intramolecular electrophilic aromatic substitution and aromatization. Acridines can be directly prepared from aromatic aldehydes by in situ imineformation using catalytic benzylamine.
alcohols or amines as nucleophiles in the presence of CF3SO3H is established. A series of polycyclic acridine derivatives bearing large π-conjugated systems were obtained in high yields, including some key intermediates for the synthesis of biologically active molecules. The photophysical properties of these synthesized acridines were investigated, demonstrating that the sulfur heterocyclic acridine 9w
建立了在CF 3 SO 3 H存在下通过醇或胺作为亲核试剂将靛红环化和酯化或酰胺化制备吖啶酯和酰胺的简单有效的合成方案。以高产率获得了一系列带有大π共轭体系的多环吖啶衍生物,包括一些用于合成生物活性分子的关键中间体。研究了这些合成吖啶的光物理性质,表明硫杂环吖啶9w以高量子产率获得。
Ultra-Sensitive Chemiluminescent Substrates for Enzymes and Their Conjugates
申请人:Giri Pal Brij
公开号:US20070225498A1
公开(公告)日:2007-09-27
New chemiluminescent compounds, stable in aqueous buffers, for use in biological assaying include acridanebased compounds and (1,2)-dioxetanes. Among the new acridanebased compounds are water-soluble acridanes, enhancer coupled acridanes, bis and trisacridanes as well as acridane-(1,2)-dioxetanes. Among the new (1,2)-dioxetanes are electron deficient group-containing dioxetanes and tethered bis-1,2-dioxetanes. The (1,2)-dioxetanes are useful as substrates for various enzymes. The acridanes can be admixed with an oxidizing agent. An aqueous buffer and, optionally, a stabilizer to form a substrate or reagent formulation useful for assaying, inter alia, HRP.
nonactivated arenes and amines. This one-pot method utilizes arene-arenophile para-cycloadducts, formed via visible-light-mediated [4+2]-photocycloaddition that undergoes formal allylic substitution with amine nucleophiles under Pd-catalysis. The products are obtained with exclusive syn-1,4-selectivity; the method permits enantioselective desymmetrization of naphthalene, as well as elaborations of amine-containing
Metal ion assisted DNA-intercalation of crown ether-linked acridine derivatives
作者:Ryuji Fukuda、Shigeori Takenaka、Makoto Takagi
DOI:10.1039/c39900001028
日期:——
Crown ether linked DNA-intercalators have shown an enhanced binding ability to DNA in the presence of certain kinds of metalions, due to a cationic property given by the co-ordination of the crown ether moiety to the metalions.