scholarly journals Cross-strand disulfides in the hydrogen bonding site of antiparallel β-sheet (aCSDhs): Forbidden disulfides that are highly strained, easily broken

2018 ◽  
Vol 28 (1) ◽  
pp. 239-256
Author(s):  
Naomi L. Haworth ◽  
Michael J. Wouters ◽  
Morgan O. Hunter ◽  
Lixia Ma ◽  
Merridee A. Wouters
Keyword(s):  
Hydrogen Bonding ◽  
Highly Strained ◽  
Β Sheet ◽  
Hydrogen Bonding Site ◽  
Bonding Site

scholarly journals Cross-strand disulfides in the non-hydrogen bonding site of antiparallel β-sheet (aCSDns): poised for biological switching

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86303-86321 ◽  
Author(s):  
Naomi L. Haworth ◽  
Merridee A. Wouters
Keyword(s):  
Hydrogen Bonding ◽  
Disulfide Bonds ◽  
Structural Motif ◽  
Redox Activity ◽  
Β Sheet ◽  
Hydrogen Bonding Site ◽  
Bonding Site

aCSDns are forbidden disulfides with protein redox-activity. Within the aCSDn structural motif, a cognate substrate of Trx-like enzymes, the disulfide bonds are strained and metastable, facilitating their role as redox-regulated protein switches.

scholarly journals Taming the Reactivity of Alkyl Azides by Intramolecular Hydrogen Bonding: Site-Selective Conjugation of Unhindered Diazides

2021 ◽  
Author(s):  
Koshiro Maegawa ◽  
Hiroki Tanimoto ◽  
Seiji Onishi ◽  
Takenori Tomohiro ◽  
Tsumoru Morimoto ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Click Chemistry ◽  
Intramolecular Hydrogen Bonding ◽  
Alkyl Azides ◽  
Organic Azides ◽  
Intramolecular Hydrogen ◽  
Site Selective ◽  
Hydrogen Bonding Site ◽  
Bonding Site

Organic azides are still in the center of click chemistry connecting two molecules. However, taming the conjugation selectivity of azides is difficult without the help of the bulky groups. We...

SOD activities of the copper complexes with tripodal polypyridylamine ligands having a hydrogen bonding site

2001 ◽  
Vol 324 (1-2) ◽  
pp. 108-116 ◽  
Author(s):  
Koichiro Jitsukawa ◽  
Manabu Harata ◽  
Hidekazu Arii ◽  
Hiromu Sakurai ◽  
Hideki Masuda
Keyword(s):  
Hydrogen Bonding ◽  
Copper Complexes ◽  
Hydrogen Bonding Site ◽  
Bonding Site

Infrared study of the hydrogen bonding site in a poly-functional schiff base: N(sp2) or N(sp)?

1987 ◽  
Vol 158 ◽  
pp. 301-307 ◽  
Author(s):  
C. Laureys ◽  
Th. Zeegers-Huyskens
Keyword(s):  
Hydrogen Bonding ◽  
Schiff Base ◽  
Infrared Study ◽  
Hydrogen Bonding Site ◽  
Bonding Site

Photochemical Deracemization of Chiral Sulfoxides Catalyzed by a Hydrogen-Bonding Xanthone Sensitizer

Synthesis ◽  
2019 ◽  
Vol 51 (23) ◽  
pp. 4417-4416 ◽  
Author(s):  
Laura Wimberger ◽  
Thilo Kratz ◽  
Thorsten Bach
Keyword(s):  
Hydrogen Bonding ◽  
Sulfur Atom ◽  
Acetonitrile Solution ◽  
Photochemical Behavior ◽  
Chiral Sulfoxides ◽  
Hydrogen Bonding Site ◽  
Bonding Site

Several chiral sulfoxides with a lactam hydrogen-bonding site were prepared and their photochemical behavior was studied in the presence of xanthone and thioxanthone sensitizers. While acyclic sulfoxides showed only decomposition, chiral benzothiazinone-1-oxides with a stereogenic sulfur atom underwent a stereomutation upon irradiation at λ = 366 nm in the presence of catalytic quantities of a xanthone sensitizer. A chiral xanthone with a 1,5,7-trimethyl-3-azabicyclo-[3.3.1]nonan-2-one backbone was employed in catalytic quantities (5 mol%) to achieve a deracemization reaction of racemic benzothiazinone-1-oxides in acetonitrile solution. Five substrates could be successfully deracemized in good yields and with up to 55% ee.

A Chiral Phenanthroline Ligand with a Hydrogen-Bonding Site: Application to the Enantioselective Amination of Methylene Groups

2020 ◽  
Vol 142 (16) ◽  
pp. 7374-7378 ◽  
Author(s):  
Rajasekar Reddy Annapureddy ◽  
Christian Jandl ◽  
Thorsten Bach
Keyword(s):  
Hydrogen Bonding ◽  
Methylene Groups ◽  
Phenanthroline Ligand ◽  
Hydrogen Bonding Site ◽  
Bonding Site

scholarly journals Site-selective nitrenoid insertions utilizing postfunctionalized bifunctional rhodium(ii) catalysts

2019 ◽  
Vol 10 (11) ◽  
pp. 3324-3329 ◽  
Author(s):  
Jan-Philipp Berndt ◽  
Yevhenii Radchenko ◽  
Jonathan Becker ◽  
Christian Logemann ◽  
Dhaka R. Bhandari ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Site Selective ◽  
Hydrogen Bonding Site ◽  
Bonding Site

Site-selective nitrenoid insertions are made possible with a postfunctionalized dirhodium(ii)-catalyst equipped with a remote hydrogen bonding site.

ChemInform Abstract: IR Study of the Hydrogen Bonding Site in a Poly-Functional Schiff Base: N(sp2) or N(sp)?

ChemInform ◽  
1987 ◽  
Vol 18 (37) ◽  
Author(s):  
C. LAUREYS ◽  
TH. ZEEGERS-HUYSKENS
Keyword(s):  
Hydrogen Bonding ◽  
Schiff Base ◽  
Ir Study ◽  
Hydrogen Bonding Site ◽  
Bonding Site

Hydrophobic fluorine mediated switching of the hydrogen bonding site as well as orientation of water molecules in the aqueous mixture of monofluoroethanol: IR, molecular dynamics and quantum chemical studies

2017 ◽  
Vol 19 (36) ◽  
pp. 24667-24677 ◽  
Author(s):  
Saptarsi Mondal ◽  
Biswajit Biswas ◽  
Tonima Nandy ◽  
Prashant Chandra Singh
Keyword(s):  
Molecular Dynamics ◽  
Hydrogen Bonding ◽  
Quantum Chemical ◽  
Water Molecules ◽  
Chemical Studies ◽  
Quantum Chemical Studies ◽  
Aqueous Mixture ◽  
Hydrogen Bonding Site ◽  
Bonding Site

Fluorination of ethanol changes orientation of water in its aqueous mixture.

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