One-pot three component reaction involving cyclohexyl isocyanide for the synthesis of furo[3,4-b]chromenes

On stirring an equimolar mixture of 4-oxo-4H-chromene-3-carbaldehyde, ninhydrin and cyclohexyl isocyanide in CH(2)Cl(2)-MeOH (7: 1) at room temperature produces 3-cyclohexylimino-1-(2-hydroxy-1,3-dioxo-2,3-dihydro-1H-inden-2-yl)-1,3-dihydro-9H-furo[3,4-b]chromen-9-one which on hydrolysis produces 1-(2-hydroxy-1,3-dioxo-2,3-dihydro-1H-inden-2-yl)-1H-furo[3,4-b]chromene-3,9-dione. The structure of the latter compound was confirmed by single crystal X-ray diffraction

On (b,c)-system at finite temperature in thermo field approach

We construct the finite temperature field theory of the two-dimensional ghost-antighost system within the framework of thermo field theory. (C) 2000 Elsevier B.V. B.V. All rights reserved.

Improvement of the ferroelectric properties of ABO(3) (A= Pb, Ca, Ba; B=Ti, Zr) films

High-quality ABO(3)/LaNiO3 (A = Ph, Ca, Ba; B = Ti, Zr) hetero structures have been grown on LaAlO3 (1 0 0) substrate by the chemical solution deposition method and crystallized by a microwave oven technique. The structural, morphological and electric properties were characterized by means of X-ray diffraction (XRD), atomic force microscope (AFM), and dielectric and ferroelectric measurements. XRD patterns revealed single-phase polycrystalline and oriented thin films whose feature depends on the composition of the films. The AFM surface morphologies showed a smooth and crack-free surface with the average grain size ranging from 116 to 300 nm for both LaNiO3 electrode and the ferroelectric films. Dielectric measurements on these samples revealed dielectric constants as high as 1800 at frequency of 100 KHz. Such results showed that the combination of the chemical solution method with the microwave process provides a promising technique to grow high-quality thin films with good dielectric and ferroelectric properties. (c) 2005 Elsevier Ltd. All rights reserved.

Quartet no. 4 in C minor for two violins, viola and violoncello.

Pl. no. 111942.

Refranes, y modos de hablar castellanos : con los latinos que les corresponden, y la glosa, y explicación de los que tienen necesidad de ella : Con un indice de los adgios latinos, á los quales corresponden los castellanos, que van puestos en el libro por el órden de A. B. C. /

Palau,

One hundred lectures on the ancient and modern dramatic poets,... down to the 19th century, commencing with Thespic, 6th century B.C.

Each v. contains nine lectures.

Obras completas de Buffon : aumentadas con artículos suplementarios sobre diversos animales no conocidos de Buffon por Cuvier ; traducidas al castellano por P. A. B. C. L.

Retr. del aut. en v. 1.

Thesaurus for SOYA : computerized bibliographic database on soybean utilization, processing, marketing nutrition, production, and history, 1100 B.C. to the 1980s /

Mode of access: Internet.

セネカ論説集 全

Mode of access: Internet.