318968-39-7Relevant academic research and scientific papers
Designing Homogeneous Copper-Free Sonogashira Reaction through a Prism of Pd-Pd Transmetalation
Martek, Bruno A.,Gazvoda, Martin,Urankar, Damijana,Ko?mrlj, Janez
, p. 4938 - 4943 (2020)
Simultaneous introduction of two different palladium (pre)catalysts, one tuned to promote oxidative addition to (hetero)aryl bromide and another to activate terminal alkyne substrate, leads to productive Pd-Pd transmetalation, subsequent reductive elimina
NOVEL COMPOUNDS EXHIBITING PHOTOPHYSICAL PROPERTIES UPON FORMATION OF LEWIS ACID-BASE ADDUCTS USING NON-CHELATING BORANES, METHOD FOR PRODUCING THE SAME AND DEVICES INCLUDING THE SAME
-
Page/Page column 24, (2017/02/24)
The present invention relates to novel compounds exhibiting photophysical properties upon formation of Lewis acid-base adducts using non-chelating boranes and methods for producing the same as well as devices that include such Lewis acid-base adducts of the following general formula (I).
B(C6F5)3: A lewis acid that brings the light to the solid state
Hansmann, Max M.,Lpez-Andarias, Alicia,Rettenmeier, Eva,Egler-Lucas, Carolina,Rominger, Frank,Hashmi, A. Stephen K.,Romero-Nieto, Carlos
supporting information, p. 1196 - 1199 (2016/01/20)
The straightforward coordination of the Lewis acid B(C6F5)3 to classical, non-emitting aldehydes results in solid-state photoluminescence. Variation of the electronic properties of the carbonyl moieties lead to the modulation of the solid-state emission colors, covering the entire visible spectrum with quantum yields up to 0.64. Steady-state spectroscopy in combination with X-ray diffraction analysis and DFT calculations confirm that intermolecular interactions between the Lewis adducts are responsible for the observed luminescence. Alteration of the latter interactions induces, moreover, remarkable solid-state phenomena such as piezochromism. The versatility and simplicity of our approach facilitate the future development of solid-state emitting materials. Turn on the light: A straightforward methodology can be used to "switch on" the solid-state fluorescence of non-emitting carbonyl compounds. Subtle electronic changes in the aldehyde moieties lead to a variety of emission colors that cover the entire visible spectrum. The materials also display pressure-dependent luminescent properties (piezochromism).
One-pot synthesis of unsymmetrical diarylacetylenes via Sonogashira/deacetonation/Sonogashira cross-coupling of two different aryl chlorides with 2-methyl-3-butyn-2-ol
Xu, Kai,Sun, Suyan,Zhang, Guodong,Yang, Fan,Wu, Yangjie
, p. 32643 - 32646 (2014/08/18)
With the assistance of PdCl2/X-Phos as the catalyst system, a green and efficient protocol for one-pot Sonogashira/Deacetonation/Sonogashira coupling reaction of two different aryl chlorides with 2-methyl-3-butyn-2-ol was developed, affording various unsymmetrical diarylacetylenes in mostly moderate to excellent yields. Note that the cheap and economically available aryl chlorides and 2-methyl-3-butyn-2-ol as the starting materials could be added to the catalyst system directly and simultaneously. Moreover, this tandem reaction could tolerate substrates bearing one or even two ortho-sterically hindered groups and was also applicable to the synthesis of symmetrical diarylacetylenes. In addition, the competitive reaction was performed and a possible mechanism was also proposed. This journal is the Partner Organisations 2014.
Substituent-dependent reactivity in aldehyde transformations: 4-(phenylethynyl)benzaldehydes versus simple benzaldehydes
Katsuyama, Isamu,Chouthaiwale, Pandurang V.,Cui, Hai-Lei,Ito, Yuji,Sando, Ayumi,Tokiwa, Hiroaki,Tanaka, Fujie
, p. 4098 - 4104 (2013/07/31)
Effects of substituents on transformations of 4-(phenylethynyl) benzaldehydes and related benzaldehydes were analyzed in aldol and thiazolidine formation reactions. The aldol reaction of 4-cyanobenzaldehyde was 54-fold faster than that of 4-methoxybenzald
