Synthesis of a Novel Cysteine-Incorporated Anthraquinone Derivative and Its Structural Properties

A novel cysteine-incorporated anthraquinone derivative was synthesized, and its molecular structure was determined by X-ray crystal analysis. Each mercapto group was located separately and did not form a disulfide bond, and hydrogen bondings and π-π interaction were observed from the packing structure.

Fluorescence and phosphorescence study of germanium–acetylene polymers and germa[N]pericyclynes

Synthesis and optical properties of skipped polyynes comprising germanium–acetylene units are presented.

Accessible protocol for asymmetric hydroformylation of vinylarenes using formaldehyde

The rhodium(i)/chiral Ph-bpe-catalyzed reaction of vinylarenes with formaldehyde provides an accessible protocol for asymmetric hydroformylation to enantioenriched aldehydes in high yields.

Synthesis and characterization of germa[n]pericyclynes

The synthesis and characterization of novel pericyclynes comprising germanium atoms and acetylenes, germa[n]pericyclynes, are described. The prepared germa[4]-, [6]-, and [8]pericyclynes were compared by (13)C NMR spectroscopy, X-ray crystallography, cyclic voltammetry, UV-visible spectroscopy, fluorescence emission spectroscopy, Raman spectroscopy, and density functional theory calculation analyses.

Microflow photochemistry: UVC-induced [2 + 2]-photoadditions to furanone in a microcapillary reactor

[2 + 2]-Cycloadditions of cyclopentene and 2,3-dimethylbut-2-ene to furanone were investigated under continuous-flow conditions. Irradiations were conducted in a FEP-microcapillary module which was placed in a Rayonet chamber photoreactor equipped with low wattage UVC-lamps. Conversion rates and isolated yields were compared to analogue batch reactions in a quartz test tube. In all cases examined, the microcapillary reactor furnished faster conversions and improved product qualities.

Recent Applications and Developments of Organic Azides in Total Synthesis of Natural Products

Organic azides have been exploited since their discovery because of their high reactivities. Various organic reactions using azides have been synthetically applied in chemical biology pharmaceuticals medicinal and agricultural areas. In this review we present some recent applications and developments of organic azides in the total synthesis of natural products (mostly within five years) especially alkaloids. We focus not only on application examples of organic azides but also show their preparation methods including recently reported procedures concerning their decomposing and reducing methods in the syntheses of bioactive molecules.

Recent applications and developments of organic azides in total synthesis of natural products

Organic azides have been exploited since their discovery because of their high reactivities. Various organic reactions using azides have been synthetically applied in chemical biology, pharmaceuticals, medicinal, and agricultural areas. In this review, we present some recent applications and developments of organic azides in the total synthesis of natural products (mostly within five years), especially alkaloids. We focus not only on application examples of organic azides, but also show their preparation methods including recently reported procedures concerning their decomposing and reducing methods in the syntheses of bioactive molecules.

Image sensor pixel with on-chip high extinction ratio polarizer based on 65-nm standard CMOS technology

In this study, we demonstrate a polarization sensitive pixel for a complementary metal-oxide-semiconductor (CMOS) image sensor based on 65-nm standard CMOS technology. Using such a deep-submicron CMOS technology, it is possible to design fine metal patterns smaller than the wavelengths of visible light by using a metal wire layer. We designed and fabricated a metal wire grid polarizer on a 20 × 20 μm(2) pixel for image sensor. An extinction ratio of 19.7 dB was observed at a wavelength 750 nm.