Results 91 to 100 of about 70,546 (390)
Angewandte Chemie, EarlyView.Tetra‐ortho‐Azobenzenes (TOABs) in broad daylight: in recent years, TOAB photoswitches became indispensable tools for all‐visible‐light manipulation of chemistry, biology and materials. This review explores their unique photochemical properties, design and synthetic approaches, offering support in choosing a TOAB for a given application.
Francesca Cardano +2 more
wiley +2 more sources
Acta Crystallographica Section E: Crystallographic Communications, 2019 The title compounds, 6-(naphthalen-1-yl)-6a-nitro-6,6a,6 b,7,9,11a-hexahydrospiro[chromeno[3′,4′:3,4]pyrrolo[1,2-c]thiazole-11,11′-indeno[1,2-b]quinoxaline], C37H26N4O3S, (I), and 6′-(naphthalen-1-yl)-6a′-nitro-6′,6a′,6b′,7′,8′,9′,10′,12a′-octahydro-2H ...
G. Foize Ahmad +4 more
doaj +1 more source
Synthesis of pyrrolizines by intramolecular capture of 1,4-dipolar intermediates in reactions of enamines with dimethyl acetylenedicarboxylate [PDF]
, 1981 Solvent polarity and reaction temperature strongly influence the reactions of dimethyl acetylenedicar-boxylate (DMAD) with 1-pyrrolidinyl enamines of acyclic and cyclic ketones. Whereas DMAD and 1-[1-phenyl-2-(phenylthio)ethenyl]pyrrolidine (3) give only
Harkema, S. +5 more
core +3 more sources
Removal of the Pyrrolidine Group by Dehydrogenation of a 4‐Pyrrolidin‐2‐yl‐tetrahydroisoquinoline [PDF]
Archiv der Pharmazie, 1992 AbstractDehydrogenation of 6,7‐dimethoxy‐1‐methyl‐4‐(N‐methyl‐pyrrolidin‐2‐yl)‐3,4‐dihydroisoquinoline (9) by Pd/C in tetraline leads to dehydrogenated products, rearrangement, and elimination of the pyrrolidine group mainly as N‐methylpyrrolidine (Scheme 3).
Engelbert Seidl +2 more
openaire +2 more sources
Recent Developments in Radical Mediated Synthesis of Organostannanes.
Advanced Synthesis &Catalysis, EarlyView.Abstract The present review aims to provide an overview of the recent developments in the preparation of aryl‐ or alkenyl stannanes via carbon‐ and tin‐centered radicals enabling chemists to synthesize organostannyl derivatives with high efficiency and under mild conditions.
Qianhang Ren +4 more
wiley +1 more source
Borohydride Oxidation as Counter Reaction in Reductive Electrosynthesis
Angewandte Chemie, EarlyView.Herein, anodic borohydride oxidation is demonstrated to have great potential for successfully replacing sacrificial metal anodes in a variety of electroreductive organic transformations. This anodic counter reaction effectively serves as the inverse of cathodic proton reduction, producing H2 at inert carbon‐based electrode materials.
Julius Kuzmin +6 more
wiley +2 more sources
Acta Crystallographica Section E: Crystallographic Communications, 2015 In the title compound, C27H24N2O3, the dihedral angle between the mean planes of the dihydrofuran and 3,4-dihydroquinoline ring systems is 70.65 (9)°. The dihydrofuran ring adopts an envelope conformation with the C atom adjacent to the methylene C atom ...
M. P. Savithri +4 more
doaj +1 more source
Novel sulfur and selenium containing bis-α-amino acids from 4-hydroxyproline [PDF]
, 2010 The synthesis of new substituted prolines carrying at C-4 a second α-amino acid residue is reported. The amino acid, l-cysteine or l-selenocysteine, is linked to the proline ring through the sulfur or the selenium atom, respectively.
CAPUTO, ROMUALDO +4 more
core +1 more source
Advanced Science, EarlyView.The biosynthetic mechanism of novel natural tetramic acid S‐TeA in Alternaria alternata is elucidated. Threonine acts as a precursor for 2‐amino‐3‐methylhexanoic acid (AMHA) synthesis via eight key enzymes from the branched‐chain amino acid biosynthetic pathway in the mitochondrion, wherein three unique enzymes (IPMS, IPMDH, and ISMD) play critical ...
He Wang +9 more
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