68763-06-4Relevant articles and documents
Suzuki-Miyaura cross-coupling reactions of potassium alkenyltrifluoroborates
Molander, Gary A.,Bernardi, Carmem R.
, p. 8424 - 8429 (2002)
We have previously reported that the palladium-catalyzed cross-coupling reaction of air-stable potassium alkenyltrifluoroborates with aryl halides and triflates proceeds readily with good yields. Recent progress in outlining the scope and limitations of s
2,4-Distyryl- and 2,4,6-Tristyrylpyrimidines: Synthesis and Photophysical Properties
Fecková, Michaela,Le Poul, Pascal,Guen, Fran?oise Robin-Le,Roisnel, Thierry,Pytela, Old?ich,Klikar, Milan,Bure?, Filip,Achelle, Sylvain
, p. 11712 - 11726 (2018/09/25)
The synthesis of a series of 20 new 2,4,6-tristyrylpyrimidines and three new 2,4-distyrylpyrimidines by means of combination of Knoevenagel condensation and Suzuki-Miyaura cross-coupling reaction is reported. This methodology enables us to obtain chromophores with identical or different substituent on each arm. The photophysical properties of the compounds are described. Optical properties and time-dependent density functional theory calculations indicate that photophysical properties of target compounds are mainly affected by the nature of the electron-donating group in C4/C6 positions, except when the C2 substituent is a significantly stronger electron-donating group. However, the C2 substituent has a strong influence on emission quantum yield: addition of a strong electron-donating group tends to decrease the fluorescence quantum yield, whereas a moderate electron-withdrawing group results in a significant increase of fluorescence quantum yield.
Studies on Pyrimidine Derivatives. XVIII. Reaction of Active Methyl Groups on Pyrimidine N-Oxides
Yamanaka, Hiroshi,Ogawa, Shigeru,Konno, Shoetsu
, p. 1526 - 1533 (2007/10/02)
Knoevenagel-type condensation and the Mannich reaction were investigated with various pyridine N-oxides having an active methyl group.For example, 6-methyl-4-phenylpyrimidine 1-oxide (Va) readily reacted with benzaldehyde in an aqueous ethanolic solution