Amido−Imidol Tautomerization by Acid-Catalyzed Addition of Nitriles to 16-Hydroxyhexadec-cis-9-enoic Acid:  A Novel Route for 9-[Substituted Amido]-16-ol-hexadecanoic Acids, and Their Biological Importance and Possible Industrial Utilization

2005 ◽  
Vol 44 (2) ◽  
pp. 254-260 ◽  
Author(s):  
Kallappa M. Hosamani ◽  
Raghavendra M. Sattigeri
Keyword(s):  
Enoic Acid ◽  
Biological Importance ◽  
Industrial Utilization ◽  
Acid Catalyzed

Formic acid catalyzed isomerization of protonated cytosine: a lower barrier reaction for tautomer production of potential biological importance

2017 ◽  
Vol 19 (21) ◽  
pp. 13515-13523 ◽  
Author(s):  
Lingxia Jin ◽  
Mengdan Lv ◽  
Mengting Zhao ◽  
Rui Wang ◽  
Caibin Zhao ◽  
...  
Keyword(s):  
Formic Acid ◽  
Unimolecular Reaction ◽  
Small Reduction ◽  
Biological Importance ◽  
Acid Catalyzed ◽  
Protonated Cytosine

Isomerization barrier for isolated unimolecular reaction is quite high, and its probability may be very small. Reduction of isomerization barrier is over 36 kJ mol−1 in going from H2O to HCOOH⋯H2O group catalysts.

scholarly journals Correction: Formic acid catalyzed isomerization of protonated cytosine: a lower barrier reaction for tautomer production of potential biological importance

2017 ◽  
Vol 19 (48) ◽  
pp. 32741-32741
Author(s):  
Lingxia Jin ◽  
Mengdan Lv ◽  
Mengting Zhao ◽  
Rui Wang ◽  
Caibin Zhao ◽  
...  
Keyword(s):  
Formic Acid ◽  
Chem Phys ◽  
Biological Importance ◽  
Acid Catalyzed ◽  
Protonated Cytosine ◽  
Phys Chem Chem Phys

Correction for ‘Formic acid catalyzed isomerization of protonated cytosine: a lower barrier reaction for tautomer production of potential biological importance’ by Lingxia Jin et al., Phys. Chem. Chem. Phys., 2017, 19, 13515–13523.

Acid Catalyzed Furan Ring Transposition

10.1039/sp768 ◽  
2014 ◽  
Author(s):  
Jamsheena V. ◽  
Ravindra Phatake
Keyword(s):  
Furan Ring ◽  
Acid Catalyzed

The Biological Importance of Bile Salts

1979 ◽  
Vol 7 (6) ◽  
pp. 1323-1323
Author(s):  
H. DANIELSSON
Keyword(s):  
Bile Salts ◽  
Biological Importance

Catalytic Carbonyl-Olefin Metathesis of Aliphatic Ketones: Iron(III) HomoDimers as Lewis Acidic Superelectrophiles

2018 ◽  
Author(s):  
Haley Albright ◽  
Paul S. Riehl ◽  
Christopher C. McAtee ◽  
Jolene P. Reid ◽  
Jacob R. Ludwig ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Olefin Metathesis ◽  
Acid Activation ◽  
Lewis Acid Catalysts ◽  
Distinct Mode ◽  
Aliphatic Ketones ◽  
Carbon Carbon Bond ◽  
Metathesis Reactions ◽  
Acid Catalyzed

<div>Catalytic carbonyl-olefin metathesis reactions have recently been developed as a powerful tool for carbon-carbon bond</div><div>formation. However, currently available synthetic protocols rely exclusively on aryl ketone substrates while the corresponding aliphatic analogs remain elusive. We herein report the development of Lewis acid-catalyzed carbonyl-olefin ring-closing metathesis reactions for aliphatic ketones. Mechanistic investigations are consistent with a distinct mode of activation relying on the in situ formation of a homobimetallic singly-bridged iron(III)-dimer as the active catalytic species. These “superelectrophiles” function as more powerful Lewis acid catalysts that form upon association of individual iron(III)-monomers. While this mode of Lewis acid activation has previously been postulated to exist, it has not yet been applied in a catalytic setting. The insights presented are expected to enable further advancement in Lewis acid catalysis by building upon the activation principle of “superelectrophiles” and broaden the current scope of catalytic carbonyl-olefin metathesis reactions.</div>

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