ChemistryEurope, EarlyView.Hyperpolarization by parahydrogen‐induced polarization enhances the sensitivity of nuclear magnetic resonance spectroscopy of amino acids, peptides, mini‐proteins, and biopolymers using nonnatural amino acids with unsaturated side chains up to three orders of magnitude.
Gerd Buntkowsky
wiley +1 more source
cis-1,3,4,6-Tetranitrooctahydroimidazo-[4,5-d]imidazole (BCHMX) as a part of explosive mixtures
Defence Technology, 2018 cis-1,3,4,6-Tetranitrooctahydroimidazo-[4,5-d]imidazole (BCHMX) is a relatively available bicyclic nitramine in the present. Due to the high energetic content of its molecule (deformation of valence angles) it has heat of formation higher than β−1,3,5,7 ...
Svatopluk Zeman +3 more
doaj +1 more source
Generation of Molecular Complexity from Cyclooctatetraene: Preparation of Aminobicyclo[5.1.0]octitols [PDF]
, 2015 A series of eight stereoisomeric N-(tetrahydroxy bicyclo-[5.1.0]oct-2S*-yl)phthalimides were prepared in one to four steps from N-(bicyclo[5.1.0]octa-3,5-dien-2-yl)phthalimide (±)-7, which is readily available from cyclooctatetraene (62 % yield).
Donaldson, William +5 more
core +2 more sources
Molecules, 2020 The mechanism of reactions of silatranes and germatranes, and their bicyclic and monocyclic analogues with one molecule of methanol or ethanol, was studied at the Density Functional Theory (DFT) B3PW91/6-311++G(df,p) level of theory.
Denis Chachkov +2 more
doaj +1 more source
QM(DFT) and MD studies on formation mechanisms of C_(60) fullerenes [PDF]
, 2000 One of the most puzzling aspects of fullerenes is how such complicated symmetric molecules are formed from a gas of atomic carbons, namely, the atomistic or chemical mechanisms. Are the atoms added one by one or as molecules (C2, C3)? Is there a critical
Che, Jianwei +3 more
core
Preparation and structural analysis of (±)-cis-ethyl 2-sulfanylidenedecahydro-1,6-naphthyridine-6-carboxylate and (±)-trans-ethyl 2-oxooctahydro-1H-pyrrolo[3,2-c]pyridine-5-carboxylate [PDF]
, 2014 Bicycle ring closure on a mixture of (4aS,8aR)- and (4aR,8aS)-ethyl 2-oxodecahydro-1,6-naphthyridine-6-carboxylate, followed by conversion of the separated cis and trans isomers to the corresponding thioamide derivatives, gave (4aSR,8aRS)-ethyl 2 ...
Borne +15 more
core +2 more sources
2-Isobutyl-2-phosphabicyclo[3.3.1]nonane 2-selenide
Acta Crystallographica Section E, 2009 The title compound, C12H23PSe, represents the first structure of a phosphine containing the bicyclic 2-phosphabicyclo[3.3.1]nonane (VCH) unit.
doaj +1 more source
Chemical generation and modification of peptides containing multiple dehydroalanines [PDF]
, 2015 Chemical formation of dehydroalanine has been widely used for the post-translational modification of protein and peptides, however methods to incorporate multiple dehydroalanine residues into a single peptide have not been defined.
Foley, PJ +3 more
core +1 more source
Cross-class metallo-β-lactamase inhibition by bisthiazolidines reveals multiple binding modes [PDF]
, 2016 Metallo-β-lactamases (MBLs) hydrolyze almost all β-lactam antibiotics and are unaffected by clinically available β-lactamase inhibitors (βLIs). Active-site architecture divides MBLs into three classes (B1, B2, and B3), complicating development of βLIs ...
Bonomo, Robert A. +12 more
core +3 more sources
Influence of peat formation conditions on the transformation of peat deposit organic matter [PDF]
, 2015 The paper studies the individual composition of n-alkanes, polycycloaromatic hydrocarbons, steroids, bi-, tri-, and pentacyclic terpenoids of two peat deposits of rich fen Kirek located in Western Siberia.
Duchko, Mariya Aleksandrovna +3 more
core +1 more source