Results 121 to 130 of about 9,389 (255)
Chemistry – A European Journal, EarlyView.Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis +2 more
wiley +1 more source
, 2016 Domino metathesis involving ring-opening metathesis–ring-closing metathesis (ROM–RCM) of a bicyclo[2.2.2]octene derivative having an appropriate alkene chain, expected to produce a 7/6 fused bicyclic system, provided a decalin system in contrast to ROM ...
Manju Ghosh (2062648) +2 more
core +1 more source
Chemistry – A European Journal, EarlyView.A new iminophosphorane‐based scorpionate ligand enabled the characterization of a head‐to‐head silylene dimer with unsupported Si─Si bonding, whereas the tetrylene species of Sn and Pb afforded head‐to‐tail coordination polymers in the solid state. ABSTRACT N,N‐chelating ligands disfavor element–element bonding in heavier alkene analogs of group 13 and
Huanhuan Dong +10 more
wiley +1 more source
Alkali‐Metal Base Catalyzed Electrocyclization of Isoprene Derivatives
Chemistry – A European Journal, EarlyView.Simple and abundant alkali‐metal base catalysis in combination with Lewis basic polyamines enables the electrocyclization of isoprene‐derived trienes to cycloheptadienes under neat conditions. Mechanistic insight supported by DFT guides a scalable route to seven‐membered carbocycles which, after reduction, give saturated cycloalkanes relevant as ...
Mikaël Le Roch +3 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.A 9,10‐dihydro‐9,10‐disilaanthracene platform was efficiently synthesized and features intrinsically electrophilic Si sites. Upon stepwise reductive Si─H bond cleavage, these Si sites are converted into nucleophilic centers. This controlled polarity switching also enables ambiphilic reactivity within a homo‐heteroelement framework.
Moritz Schmidt +4 more
wiley +1 more source
Spiro-annulation via ring closing metathesis reaction
, 1999 Various spiro cyclic systems are prepared from beta-di-carbonyl compounds and active methylene substrates via palladium catalyzed allylation and ring-closing metathesis (RCM) reaction as key ...
GANESH, T +4 more
core
Synthesis of cyclic proline-containing peptides via ring-closing metathesis
, 2003 Several dienes embedded in di- and tripeptides which incorporate proline have been prepared and subjected to ring-closing metathesis. Bicyclic peptides of well-defined amide geometry and of varying ring sizes were prepared.
Brimble, MA +5 more
core +1 more source
Breaking the Mold: Electrophilic Hydrophosphanation Emerges
Chemistry – A European Journal, EarlyView.Electrophilic hydride attack on the olefin, instead of the classical nucleophilic addition by a phosphanido ligand, is unveiled in rhodium‐catalyzed olefin hydrophosphanation. This hydride‐driven pathway operates for both activated and inactivated olefins, with transition states characterized by elongated Rh─H bonds and nascent C─H bond formation ...
Víctor Varela‐Izquierdo +4 more
wiley +1 more source
Design, synthesis and photophysical properties of novel star-shaped truxene-based heterocycles utilizing ring-closing metathesis, Clauson-Kaas, Van Leusen and Ullmann-type reactions as key tools. [PDF]
Beilstein J Org Chem, 2021 Alvi S, Ali R.
europepmc +1 more source