Results 31 to 40 of about 12,701 (222)

Mechanistic Paths for the Gold(I)‐Catalyzed Heteroannulation of Salicylic Amides With Apolar Alkynes Explored With Density Functional Theory Calculations

European Journal of Organic Chemistry, EarlyView.
A manifold of catalytic reaction paths can operate in the Au(I)‐catalyzed heteroannulation of salicylic amides and alkynes. However, a subtle initial nucleophilic advantage of N versus O and a kinetic bottleneck at an advanced stage of the mechanistic machinery seems to suffice for the reaction to run on a single path and with exquisite selectivity. We
Ioannis Stylianakis, Evaggelia Vlachou, Carlos Silva López, Antonios Kolocouris   +3 more
wiley   +1 more source

alicyclic compounds [PDF]

, 2014
Citation: 'alicyclic compounds' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.A00216 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Examining the PM6 semiempirical method for pKa prediction across a wide range of oxyacids [PDF]

, 2009
The pK~a~ estimation ability of the semiempirical PM6 method was evaluated across a broad range of oxyacids and compared to results obtained using the SPARC software program.
Kaya Forest, Ken J. Friesen, Sierra Rayne   +2 more
core   +1 more source

Aminolysis Reaction of Glycerol Carbonate in Organic and Hydroorganic Medium [PDF]

, 2012
Aminolysis reaction of glycerol carbonate with primary amine in organic and hydroorganic media leads to the formation of two hydroxyurethane isomers and a partial decomposition of glycerol carbonate into glycerol.
Aresta, Baizer, Bassam Nohra, Burgel, Couvret, Darensbourg, Figovsky, Garipov, Jean-François Blanco, Kihara, Kihara, Laure Candy, Meier-Westhues, Mikheev, Mouloungui, Ochiai, Ochiai, Oertel, Rokicki, Rousseau, Takagaki, Thomson, Tomita, Tomita, Tomita, Tomita, Ubaghs, Vieville, Webster, Yann Raoul, Zephirin Mouloungui   +30 more
core   +2 more sources

Chemical Ionization Mass Spectrometry: Fundamental Principles, Diverse Applications, and the Latest Technological Frontiers

Mass Spectrometry Reviews, EarlyView.
ABSTRACT The review examines the evolution of chemical ionization mass spectrometry (CI‐MS), a technique developed in 1966 by Field and Munson. CI is a soft‐ionization method that produces more intense molecular ions with less fragmentation than electron ionization (EI).
Malvika Dutt, Adriana Arigò, Giorgio Famiglini, Pierangela Palma, Achille Cappiello   +4 more
wiley   +1 more source

Scientific Opinion on Flavouring Group Evaluation 18, Revision 3 (FGE.18Rev3): Aliphatic, alicyclic and aromatic saturated and unsaturated tertiary alcohols, aromatic tertiary alcohols and their esters from chemical groups 6 and 8

EFSA Journal, 2015
The Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids of the European Food Safety Authority was requested to evaluate 29 flavouring substances in the Flavouring Group Evaluation 18, as laid down in Commission Regulation (EC) No ...
EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF)
doaj   +1 more source

Electrospun polyimide ultrafine non-woven fabrics with high whiteness and good thermal stability from organo-soluble semi-alicyclic polyimides: Preparation and properties

eXPRESS Polymer Letters, 2019
A series of organo-soluble polyimide (PI) resins were synthesized by a two-step chemical imidization reaction from two semi-alicyclic dianhydrides, 1,4-dihydroxyphenyl-dicyclohexanecarboxylate-3,3′,4,4′-tetracarboxylic acid dianhydride (HTA-HQ, I) and 4 ...
C. Y. Guo, Q. W. Wang, J. G. Liu, L. Qi, M. G. Huangfu, X. Wu, Y. Zhang, X. M. Zhang   +7 more
doaj   +1 more source

Formamidines with antinociceptive and antiinflammatory activities [PDF]

, 1991
Pursuing our investigations on 7-amino-2,3-polymethyleneindole derivatives, a set of 7-(dimethylaminomethylene)-amino-2,3-polymethyleneindoles, together with some other aryl or cycloalkyl substituted formamidines, were prepared and tested for analgesic ...
Boatto, Gianpiero, Carrara, Maria, Cerri, Riccardo, Cima, Lorenzo, Pau, Amedeo, Satta, Margherita, Sparatore, Fabio   +6 more
core  

Scientific Opinion on the safety and efficacy of aliphatic, alicyclic and aromatic saturated and unsaturated tertiary alcohols and esters with esters containing tertiary alcohols ethers (chemical group 6) when used as flavourings for all animal species [PDF]

, 2012
Chemical group 6 consists of aliphatic, alicyclic and aromatic saturated and unsaturated tertiary alcohols and esters with esters containing tertiary alcohols ethers, of which 13 are currently authorised for use as flavours in food.
Buck, Chadha, Court, Crockett, Di Giulio, EFSA (European Food Safety Authority), EFSA (European Food Safety Authority), EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF), EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF), Gupta, Heymann, Hill, Jobling, Madyastha, Pan, Rahman, Sanz, Serota, Tocher, Wright   +20 more
core   +1 more source

Arenophile-Mediated Photochemical Dearomatization of Nonactivated Arenes

CHIMIA, 2020
Aromatic compounds are one of the most abundant classes of organic molecules and find utility as precursors for alicyclic hydrocarbon building blocks.
Mikiko Okumura, David Sarlah
doaj   +1 more source