Soyoung Park

Stereoselective hybrid systems based on metal-assisted catalysis with a chiral biomacromolecule form an attractive research area for the synthesis of enantiomerically pure compounds. Although various methods are available for this purpose, most rely on the use of enzymes, proteins, or RNA. The application of DNA-based hybrid catalysts for enantioselective synthesis emerged only a few years ago. DNA-based hybrid catalysts have been self-assembled from DNA and a metal complex with a specific ligan

Wilkinson's complex has been found to catalyze the one-pot transformation of aldoximes to the corresponding amides with high selectivity and efficiency under essentially neutral conditions.

Abstract It has been found that a new and practical catalyst system of ruthenium‐supported on alumina carries out copper‐free Sonogashira coupling reactions with high efficiency over a wide range of substrates under mild and convenient conditions.

We describe asymmetric intramolecular Friedel-Crafts alkylations with a DNA-based hybrid catalyst and propose a plausible binding model. This study shows promise for studying relationships between the helical chirality of DNA and enantioselectivity of the chemical reaction.

A 2-aminothieno[3,4-d]pyrimidine G-mimic deoxyribonucleoside, (th)dG, was synthesized and incorporated readily into oligonucleotides as a versatile fluorescent guanine analogue. We demonstrate that (th)dG enables the visual detection of Z-DNA successfully based on different π-stacking of B- and Z-DNA.

We have developed a DNA-based hybrid catalyst containing an intrastrand bipyridine ligand through direct ligand incorporation and successfully performed asymmetric intramolecular Friedel–Crafts alkylations. This is the first report on the DNA hybrid catalyst system where an intrastrand ligand is covalently introduced into the phosphate backbone. We have generated a series of active site to investigate the structural details of DNA hybrid catalysts and demonstrated that catalytic properties of DN

We report here DNA metalloenzymes that catalyzed the asymmetric Diels–Alder reactions with high conversion, excellent endo/exo selectivities, and enantioselectivities up to −97% ee. Their catalytic-pocket architectures were organized using a rational design strategy based on the Cu(II) ion, the composition of nucleobases, and the incorporation of flexible linkers. Without using the mirror image of B-DNA, DNA metalloenzymes afforded the opposite enantiomer of the Diels–Alder product compared with

The application of DNA-based hybrid catalysts for enantioselective synthesis has recently emerged. These catalysts, self-assembled from DNA and a metal complex with a specific ligand through supramolecular or covalent anchoring strategies, have demonstrated high enantioselectivity in a variety of carbon-carbon or carbon-heteroatom bond-forming reactions and have expanded their role in asymmetric catalysis. In this review, we summarize the advent and significant progress of DNA-based asymmetric c

DNA is receiving attention as a useful biomaterial in a broad range of research fields beyond its classical role as a biopolymer for storage and delivery of genetic information. Based on its chemical and thermal stability and easy accessibility, a series of DNA-based hybrid catalysts have been developed and successfully applied to various asymmetric reactions in water. Besides the canonical Watson-Crick duplex, the G-quadruplex structure has been actively exploited as horseradish-peroxidase (HRP

In cells, segregation allows for diverse biochemical reactions to take place simultaneously. Such intricate regulation of cellular processes is achieved through the dynamic formation and disassembly of membraneless organelles via liquid-liquid phase separation (LLPS). Herein, we demonstrate the light-controlled formation and disassembly of liquid droplets formed from a complex of polylysine (pLys) and arylazopyrazole (AAP)-conjugated single-stranded DNA. Photoswitchablility of droplet formation

Abstract A palladium-catalyzed decarboxylative cyclization of γ-methylidene-δ-valerolactones with isocyanides has been developed to afford conjugated cyclopentenimines under mild conditions. Some preliminary results toward the development of an asymmetric variant have also been described.

Case studies were performed in two high schools (designated K and J) in Seoul, Korea in order to examine how in-class plantscapes consisting of ornamental plants affected the indoor environment and the stress level of students. Forty-two healthy female students, 16 to 17 years old, were assigned to classrooms with or without plantscapes. Although the differences were small, plants lowered the temperature, raised the relative humidity in the classrooms, and reduced the amount of airborne fine par

A new type of Förster Resonance Energy Transfer (FRET) system using highly emissive isomorphic nucleobase analogues is reported. The FRET pair consists of 2-aminothieno[3,4-d]pyrimidine G-mimic deoxyribonucleoside (^th dG) as an energy donor and 1,3-diaza-2-oxophenothiazine (tC) as an energy acceptor. The distance and orientation between donor and acceptor was controlled by systematic incorporation of ^th dG and tC into DNA sequences to investigate the FRET efficiencies. This