Accessibility of the Lone Pair and Hydrogen Bonding Site in Biological Systems

1987 ◽  
pp. 275-278
Author(s):  
S. Toppet ◽  
J. De Taeye ◽  
M. Ruyssen ◽  
C. Laureys ◽  
Th. Zeegers-Huyskens
Keyword(s):  
Hydrogen Bonding ◽  
Biological Systems ◽  
Lone Pair ◽  
Hydrogen Bonding Site ◽  
Bonding Site

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

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.

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.

Hydrogen Bonding Site Number Predicts Dicamba Volatilization from Amine Salts

2020 ◽  
Vol 54 (21) ◽  
pp. 13630-13637
Author(s):  
Stephen M. Sharkey ◽  
Adam Stein ◽  
Kimberly M. Parker
Keyword(s):  
Hydrogen Bonding ◽  
Site Number ◽  
Hydrogen Bonding Site ◽  
Bonding Site ◽  
Amine Salts
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