Results 71 to 80 of about 31,425 (239)
Advances in Organic and Organic-Inorganic Hybrid Polymeric Supports for Catalytic Applications
Molecules, 2016 In this review, the most recent advances (2014–2016) on the synthesis of new polymer-supported catalysts are reported, focusing the attention on the synthetic strategies developed for their preparation.
Anna Maria Pia Salvo +2 more
doaj +1 more source
Asymmetric normed Baire space [PDF]
arXiv, 2021 We prove that an asymmetric normed space is never a Baire space if the topology induced by the asymmetric norm is not equivalent to the topology of a norm. More precisely, we show that a biBanach asymmetric normed space is a Baire space if and only if it is isomorphic to its associated normed space.
arxiv
Highly Enantioselective Organocatalysis with Bidentate Halogen Bond Donors
Angewandte Chemie International Edition, EarlyView.In a model Mukaiyama aldol reaction with unbiased substrates, high enantioselectivity was achieved with a modifiable bidentate iodine(I)‐based halogen bonding organocatalyst. The crucial role of halogen bonding was confirmed by the low performance of the corresponding hydrogen bond donor and via DFT calculations.
Julian Wolf +6 more
wiley +1 more source
Angewandte Chemie International Edition, Accepted Article.The development of synthetic methods for the catalytic enantioselective preparation of planar chiral paracyclophane derivaties is of considerable interest to the synthetic community. To date, relatively few successful and effective organocatalytic approaches to this molecular class have been reported.
Andrew David Smith +4 more
wiley +1 more source
Para-quinone methide: A new player in asymmetric catalysis [PDF]
, 2015 This is the accepted version of the following article: Parra, A. and Tortosa, M. (2015), para-Quinone Methide: a New Player in Asymmetric Catalysis.
Parra, Alejandro +1 more
core +2 more sources
On asymmetric hypergraphs [PDF]
arXiv, 2021 In this paper, we prove that for any $k\ge 3$, there exist infinitely many minimal asymmetric $k$-uniform hypergraphs. This is in a striking contrast to $k=2$, where it has been proved recently that there are exactly $18$ minimal asymmetric graphs. We also determine, for every $k\ge 1$, the minimum size of an asymmetric $k$-uniform hypergraph.
arxiv
ChemInform Abstract: Asymmetric Organocatalysis in Total Synthesis — A Trial by Fire [PDF]
ChemInform, 2010 AbstractReview: about 200 refs.
Raquel P. Herrera +3 more
openaire +4 more sources
Catalytic Asymmetric Amino Acid and Its Derivatives by Chiral Aldehyde Catalysis
Frontiers in Chemistry, 2021 Amine acid transformation is an important chemical process in biological systems. As a well-developed and acknowledged tool, chiral aldehyde catalysis provides good catalytic activation and stereoselective control abilities in the asymmetric reaction of ...
Kaijin Lin +4 more
doaj +1 more source
Dynamics of Public Opinion Evolution with Asymmetric Cognitive Bias [PDF]
arXiv, 2021 In this paper, we propose a pubic opinion model with incorporation of asymmetric cognitive bias: confirmation bias and negativity bias. We then investigate the generic modeling guidance of capturing asymmetric confirmation bias and negativity bias. A numerical examples is provided to demonstrate the correctness of asymmetric cognitive bias model.
arxiv
Angewandte Chemie International Edition, Accepted Article.Disclosed here is the first catalytic enantioselective electrochemical oxidative rearrangement of indoles for the efficient synthesis of highly enantioenriched spirooxindoles. The in‐situ generated HBr from substrate oxidation, known to be detrimental to the reaction itself, was perfectly consumed by cathode reduction.
Xuefeng Tan +3 more
wiley +1 more source