A new approach to the total synthesis of (-)-epimyrtine has been developed from D-alanine. The key step to access the enantiopure pyridone intermediate was achieved by a gold-mediated cyclization. Finally, various transformations afforded the natural product in a few steps and good overall yield.

Aldehyde oxidase (AO) plays an important role in metabolizing antitumor and antiviral drugs, including methotrexate, cyclophosphamide and acyclovir. Green tea and its catechins have been shown to modulate the activities of various xenobiotic-metabolizing cytochrome P450 species, both in vivo and in vitro, but their effect on AO has not been studied. Therefore, we evaluated the effect of tea bev...

Empirical valence bond (EVB) surfaces have been constructed for 2-pyridone-2hydroxypyridine proton transfer and for the Claisen rearrangement of allyl vinyl ether at the MP2/6-311þG(d,p) level of theory. A distributed Gaussian approach is used to approximate the interaction matrix elements. Parameters for the distributed Gaussians are determined by fitting to energy, gradient and Hessian data o...

The phenyltetrel pyridine-2-olates PhE(pyO)3 (E = Si, Ge, Sn; pyO pyridine-2-olate) were synthesized from the respective chlorides PhECl3 and 2-hydroxypyridine (2-pyridone) with aid of a sacrificial base (triethylamine). Their solid-state structures determined by single-crystal X-ray diffraction. PhSi(pyO)3 exhibits three-fold capped tetrahedral Si coordination sphere ([4+3]-coordination, Si···...

Urinary excretion of ultraviolet-light-absorbing end products of metabolism was studied in mentally retarded children and schizophrenic adults. Excretion of the major end product of pyrimidine metabolism, pseudouridine (5-ribosyluracil), and one of the catabolic derivatives of nicotinic acid, N -methyl-2-pyridone-5-carboxamide, were both found to be depressedin more than half the mentally retar...

Herein we report an improved self-assembling phosphorus ligand based on hydrogen bonding between pyridone/hydroxypyridine in the backbone. The N-pyrrolyl substituents significantly improve π-backbonding properties of ligand. Rhodium, iridium and platinum complexes were prepared analyzed by NMR spectroscopy x-ray crystal structure analysis. A catalyst this showed very high catalytic activity lin...

In the title compound, C(20)H(20)ClFN(4)O(3), the tetra-hydro-pyridone ring adopts a skew boat conformation. The dihedral angle between the mean planes of the benzene and pyridine rings is 80.7 (3)°. In the crystal, weak C-H⋯O inter-actions are observed.