Results 141 to 150 of about 24,787 (265)
Synthesis and reductive cleavage of 3-(2-flurophenyl) and 3-(4-flurophenyl)-cyclopent-5-en[d]isoxazolines by raney nickel in trifluroacetic acid [PDF]
, 2013 3-Fluoro arylcycloopent-5-en[d]isoxazolines have been obtained via the 1,3-dipolar cycloaddition of cyclopentadiene to aromatic nitrile oxides. The reductive cleavage of these isoxazolines by Raney nickel in trifluoroacetic acid led to corresponding ...
Antonevich, I. P. +2 more
core
Leveraging Noncovalent Interactions for the Binding of CO by a Weakly Lewis Acidic Borane
Angewandte Chemie, EarlyView.We report a carbonyl complex featuring a simple tri‐coordinate borane, characterized by a Lewis acidity which is only marginally higher than B(NMe2)3. Exposure of {(Ph2P)xanth}3B to carbon monoxide under mild conditions (1 bar, 25 °C) reversibly yields {(Ph2P)xanth}3B·CO.
Agamemnon E. Crumpton +2 more
wiley +2 more sources
Aggregate, EarlyView.The graphical abstract highlights the key concepts of this review, including chiral transfer and amplification mechanisms, macrocyclic compounds, circularly polarized luminescence (CPL) applications, chiral sensing, asymmetric catalysis, and stimuli‐responsive applications.
Wei Zhang, Mao‐Qin Liu, Yang Luo
wiley +1 more source
Supramolecular Gels as Active Tools for Reaction Engineering
Angewandte Chemie, EarlyView.The unique combination of environments within gels, self‐assembled from low‐molecular‐weight gelators, offers the ability to control reactivity in new ways, achieving unique reaction outcomes, leading to the emerging concept of supramolecular gels as nanoreactors. Smart chemical engineering methods enable the use of such gels to fabricate materials and
David K. Smith
wiley +2 more sources
Angewandte Chemie, EarlyView.By employing complex arylthianthrenium salts and readily available (hetero)aryl (pseudo)halides as starting materials, in conjunction with hypoboric acid as a reductant, structurally diverse (hetero)biaryl motifs can be rapidly synthesized via palladium‐catalyzed cross‐coupling reaction.
Yuanhao Xie, Li Zhang, Tobias Ritter
wiley +2 more sources
1,3-Dipolar cycloadditions of acridine with nitrile oxides
ARKIVOC, 2002 Antonino Corsaro +5 more
doaj +1 more source
A Surface Hydrothermal Source of Nitriles and Isonitriles [PDF]
arXivGiant impacts can generate transient hydrogen-rich atmospheres, reducing atmospheric carbon. The reduced carbon will form hazes that rain out onto the surface and can become incorporated into the crust. Once heated, a large fraction of the carbon would be converted into graphite.
arxiv
Angewandte Chemie, EarlyView.The synthesis of cyanocyclopropanes is achieved via asymmetric nitrogen insertion into prochiral cyclobutanones. Key mechanistic steps involve an organocatalyzed asymmetric condensation followed by chirality transfer via an intercepted Neber rearrangement.
Marlene Arnold +4 more
wiley +2 more sources
Reaction of pyrroles with ethyl 2-nitroso- and 2-azo-propenoates, and with ethyl cyanoformate N-oxide: a comparison of the reaction pathways [PDF]
, 2012 The reaction of ethyl 2-nitrosopropenoate 2a with 1 -methylpyrrole, 2.5-dimethylpyrrole and 2.5- diphenylpyrrole has been investigated. In every case the products result from highly regioselective attack at C-2 of the pyrrole by the electrophile.
Gilchrist, Thomas L., Lemos, A.
core
Enantioconvergent Deacylative Functionalization toward α‐Quaternary Nitriles
Angewandte Chemie, EarlyView.An enantioconvergent quaternary‐to‐quaternary synthesis of α‐chiral nitriles has been enabled. By replacing the acyl group with a variety of allyl, propargyl, and benzyl motifs, the functional group swap can convert easily available β‐ketonitriles to assorted quaternary stereocenters en route to bioactive molecules of broad interests.
Minghao Zhang, Zhongxing Huang
wiley +2 more sources