Pyridazine, pyrimidine and pyrazine ethyne compounds
申请人:Cosford D. Nicholas
公开号:US20050245542A1
公开(公告)日:2005-11-03
In accordance with the present invention, there is provided a novel class of heterocyclic compounds. Compounds of the invention contain a substituted or unsubstituted six membered heterocyclic ring that includes at least two nitrogen atoms. The ring additionally includes four carbon atoms. The heterocyclic ring has at least one substituent located at a ring position adjacent to a ring nitrogen atom. This mandatory substituent of the ring includes a moiety (B), linked to the heterocyclic ring via a carbon-carbon triple bond. The mandatory substituent is positioned adjacent to the ring nitrogen atom. Invention compounds are capable of a wide variety of uses. For example heterocyclic compounds can act to modulate physiological processes by functioning as agonists and antagonists of receptors in the nervous system. Invention compounds may also act as insecticides, and as fungicides. Pharmaceutical compositions containing invention compounds also have wide utility.
ruthenole 10b. All compounds have been fully characterized by FT-IR and 1H NMR spectroscopy and ESI-MS, and most of them additionally by single-crystal X-ray diffraction. Each of the structures of 1a–4a, 7a–9a, 7b–8b and 10a has a triruthenium triangular skeleton containing a metallacyclopentadienyl framework formed by one ligand or two coupled ligands coordinating to two ruthenium atoms of the Ru3 moiety
Extremely high enantioselectivity (>99.5% ee) and chemical yield (>99%) are achieved in an asymmetric autocatalytic reaction. A (5-pyrimidyl)alkanol with a tert-butylethynyl group at its 2-position (1) is a very efficient asymmetric autocatalyst in the enantioselective alkylation in Equation (1).
US7462619B2
申请人:——
公开号:US7462619B2
公开(公告)日:2008-12-09
A New Series of Pyrimidine-Containing Linear Molecules: Their Elegant Crystal Structures and Intriguing Photophysical Properties
作者:Ken-Tsung Wong、Fu-Chuan Fang、Yi-Ming Cheng、Pi-Tai Chou、Gene-Hsiang Lee、Yu Wang
DOI:10.1021/jo048914h
日期:2004.11.1
A new series of aza-substituted analogues 3−5 based on the 1,4-bis(phenylethynyl)benzene moiety have been synthesized by the selective Pd-catalyzed Sonogashira coupling reaction from 5-bromo-2-iodopyrimidine (1). In these linear molecules, the dipolar pyrimidine moiety is introduced as a probe to investigate factors that control the intermolecularinteractions over the crystalengineering. The results