17749-82-5Relevant academic research and scientific papers
Synthesis of a novel bipyrimidine dicarboxylic acid ligand for the preparation of panchromatic ruthenium dyes
da Silva, Maria Rosana E.,Auvray, Thomas,Hanan, Garry S.
, (2020)
A novel ruthenium complex with a new 4,4′-bipyrimidine-6,6′-dicarboxylic acid ligand (H2dcbpm) has been synthesized and its properties were investigated for application in dye-sensitized solar cells. The new dye shows a wide range of absorption of the solar spectrum with maximum of absorption at 665 nm corresponding to a 100 nm redshift compared to the precursor complex ([Ru(dcbpyH2)2(Cl)2]) of the commercial N719 dye. The energies of HOMO-LUMO obtained by voltammetry and DFT calculations show an overall stabilization of the orbitals of the bipyrimidine complex compared to the bipyridine one. Despite having promising absorption properties, the redox potentials of this complex make it unsuitable for charge injection into the conduction band on TiO2. Nevertheless, the newly prepared ligand provides an additional tuning path to adjust the energy levels of the complex in order to benefit from the red-shifted absorption it offers.
Direct access to pyrimidines through organocatalytic inverse-electron-demand Diels-Alder reaction of ketones with 1,3,5-triazine
Yang, Gongming,Jia, Qianfa,Chen, Lei,Du, Zhiyun,Wang, Jian
, p. 76759 - 76763 (2015/09/28)
An organocatalytic inverse-electron-demand Diels-Alder reaction of ketones with 1,3,5-triazine through enamine catalysis has been developed. This method could furnish 4,5-disubstituted pyrimidines in good yields and high levels of regioselectivities.
Fast and green one-pot multicomponent synthesis of a library of pyrrolo[1,2-c] pyrimidines under microwave irradiation
Georgescu, Emilian,Georgescu, Florentina,Draghici, Constantin,Cristian, Liliana,Popa, Marcel Mirel,Dumitrascu, Florea
, p. 851 - 857 (2014/03/21)
A simple, clean and rapid one-pot three component, microwave-assisted synthesis of pyrrolo[1,2-c]pyrimidine derivatives starting from various substituted pyrimidines, 2-bromoacetophenones and nonsymmetrical, electron deficient alkynes in 1,2-epoxybutane which acts both as solvent and acid scavenger is reported. This one-pot three component synthesis implies short reaction times being at the same time highly cost-effective and environmental friendly.
Synthesis of pyrimidines from ketones using microwave irradiation
Tyagarajan, Sriram,Chakravarty, Prasun K.
, p. 7889 - 7891 (2007/10/03)
A simple, high yielding synthesis of pyrimidines from ketones in the presence of HMDS and formamide is described. Under microwave irradiation, heteroaromatic, aryl, aliphatic, and cyclic ketones cyclized to give pyrimidines in good yields.
Novel synthesis of bihetaryl compounds
Nishiwaki, Nagatoshi,Yamashita, Keiko,Azuma, Mayumi,Adachi, Tomoko,Tamura, Mina,Ariga, Masahiro
, p. 1996 - 2000 (2007/10/03)
The ring transformation of nitropyrimidinone 1 with acetophenone derivatives 2 affords two kinds of azaheterocyclic compounds, 4-phenylpyrimidines 3 and 3-nitro-6-phenyl-2-pyridones 4. On the basis of the relationship between electronic properties of the substituent and ratios of products, a plausible reaction mechanism is provided. Furthermore, the present reaction could be applied to heterocyclic ketones giving bihetaryl compounds.
Pyrimidinium ylides. IX: The synthesis and the stability of some new pyrimidinium ylides
Iuhas, Paula Cristina,Georgescu, Emilian,Georgescu, Florentina,Drǎghici, Constantin,Cǎproiu, Miron Teodor
, p. 55 - 62 (2007/10/03)
The paper deals with the synthesis of 4-(2-furyl)- and 4-(2-thienyl)pyrimidines, their quaternization reactions with 2-bromoacetophenones, 2-bromoacetonaphthone and ethyl bromoacetate and the obtaining of 4-(2-furyl)- and 4-(2-thienyl)pyrimidinium ylides, by treating the corresponding quaternary salts with bases. The dipyrimidino-pyrazinic dimmers were obtained as inactivation products of 4-(2-furyl)- and 4-(2-thienyl)pyrimidinium ylides.
