Combinatorial discovery of novel fluorescent dyes based on Dapoxyl™
摘要:
We have developed a combinatorial method for the fast and effective synthesis of a library based on a known fluorescent dye, Dapoxyl(TM) using parallel solution-phase chemistry. By screening the 140 new compounds using fluorescence-based assays, we identified three new fluorescent dyes with novel properties. (C) 2002 Elsevier Science Ltd. All rights reserved.
<scp>Rh‐Catalyzed</scp>
Formal [3+2] Cyclization for the Synthesis of
<scp>5‐Aryl</scp>
‐2‐(quinolin‐2‐yl)oxazoles and Its Applications in Metal Ions Probes
efficient strategy for the synthesis of 5‐aryl‐2‐(quinolin‐2‐yl)oxazoles via rhodium‐catalyzed formal [3+2] cyclization of 4‐aryl‐1‐tosyl‐1H‐1,2,3‐triazoles with quinoline‐2‐carbaldehydes has been described. The protocol employs mild conditions and offers good yields of diverse 2,5‐aryloxazole derivatives with a broad reaction scope. It is amenable to gram‐scale synthesis and easily transformation.
通过铑催化4-芳基-1-甲苯磺酰基-1 H 1,2的正式[3 + 2]环化反应,合成5-芳基-2-(喹啉-2-基)恶唑的简便有效方法,已经描述了3-三唑与喹啉-2-甲醛。该方案采用温和的条件,并具有良好的反应范围,可提供各种2,5-芳基恶唑衍生物的良好收率。它适用于克级合成和轻松转换。此外,这种5-芳基-2-(喹啉-2-基)恶唑骨架确实是一种新的荧光团,并且还研究了其在金属离子探针中的应用,并显示了对汞离子的荧光响应。
Nickel-Catalyzed Coupling of Azoles with Aromatic Nitriles
作者:Mckenna G. Hanson、Noelle M. Olson、Zubaoyi Yi、Grace Wilson、Dipannita Kalyani
DOI:10.1021/acs.orglett.7b01938
日期:2017.8.18
This manuscript describes the Ni-catalyzed coupling of azoles with aromaticnitriles. The use of BPh3 promotes these arylations with electronically diverse azoles and benzonitriles. While the nickel catalyst is necessary for the arylations of phenyl oxazoles, arylation of benzoxazoles with some nitriles affords the arylated products even in the absence of the Ni catalyst albeit in lower yield than
Liquid Scintillators. V. Absorption and Fluorescence Spectra of 2,5-Diaryloxazoles and Related Compounds<sup>1</sup>
作者:Donald G. Ott、F. Newton Hayes、Elizabeth Hansbury、Vernon N. Kerr
DOI:10.1021/ja01577a032
日期:1957.10
Ultraviolet absorption data and wave lengths of maximum emission and mean wave lengths of fluorescence are presented. The synthesis and evaluation as scintillator solutes of previously unreported compounds are given.
the synthesis of 2,5-disubstitutedoxazolesvia iodine-promoted oxidative domino cyclization. These reactions were performed with readily available methyl azaarenes and α-amino ketones under metal-free conditions. This protocol is a simple method with high functional group compatibility, a wide range of substrates, and excellent yield, providing a new way to synthesize azaarene-attached oxazoles.