Synthesis and fluorescence properties of side-chain carboxylated 5,9-diaminobenzo[a]phenoxazinium salts
摘要:
The efficient synthesis of a series of novel side-chain carboxylated 5,9-diaminobenzo[a]phenoxazinium salts is described. The ring system was prepared by the reaction of 5-alkylamino-2-nitrosophenol hydrochlorides with the appropriate N-alkylated-naphthylamine. Evaluation of the visible and fluorescence properties of the cationic dyes was carried out in ethanol and water at physiological pH. In both solvents they showed intense visible absorption maxima in the range 500-638 nm (ethanol) and 625-650 (water), and fluoresced strongly, with fluorescence maxima from 612 to 669 nm (ethanol) and from 654 to 685 nm (water). A wide variation in fluorescence quantum yields is observed, ranging from 0.051 to 0.50 and 0.065 to 0.32 in ethanol and water, respectively. (c) 2005 Elsevier Ltd. All rights reserved.
Rh
<sup>III</sup>
‐Catalyzed Double Dehydrogenative Coupling of Free 1‐Naphthylamines with α,β‐Unsaturated Esters
作者:Supriya Rej、Naoto Chatani
DOI:10.1002/chem.202000706
日期:2020.9
of free 1‐naphthylamine and α,β‐unsaturated esters through C−H/C−H and C−H/N−H bonds is reported. The one step reaction leads to the formation of biologically important alkylidene‐1,2‐dihydrobenzo[cd]indoles scaffolds. This efficient process is much more synthetically convenient and useful than others because the starting materials, such as 1‐naphthylamine derivatives are readily available and the free
据报道,Rh III催化游离的1-萘胺与α,β-不饱和酯通过CH / CH / CH和CH / NH键进行连续的CH-CH双氧化反应。一步反应导致形成生物学上重要的亚烷基-1,2-二氢苯并[ cd ]吲哚骨架。这种高效的方法在合成上比其他方法更加方便和有用,因为起始材料(例如1-萘胺衍生物)很容易获得,而游离胺充当引导基团。
KANO SHINZO; EBATA TSUTOMU; SHIBUYA SHIROSHI, J. CHEM. SOC. PERKIN TRANS., PART 1, 1980, NO 10, 2105-2111
作者:KANO SHINZO、 EBATA TSUTOMU、 SHIBUYA SHIROSHI
DOI:——
日期:——
MYLARI, BANAVARA L.;BEYER, THOMAS A.;SIEGEL, TODD W., J. MED. CHEM., 34,(1991) N, C. 1011-1018
作者:MYLARI, BANAVARA L.、BEYER, THOMAS A.、SIEGEL, TODD W.