Results 51 to 60 of about 9,019 (233)

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

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, Kyriakos D. Nikopoulos, Ioannis N. Lykakis   +2 more
wiley   +1 more source

Donor-Acceptor Cyclopropanes with an Amino Group as Donor

Over the last two decades, a renaissance has been witnessed in the research field of donor-acceptor (DA) cyclopropanes. Among all the subclasses of DA cyclopropanes, DA cyclopropanes with an amino group as donor (DA aminocyclopropanes) have drawn ...
Waser, Jerome, Wang, Ming Ming
core   +1 more source

(2R,1'S,2'R)- and (2S,1'S,2'R)-3-[2-Mono(di,tri)fluoromethylcyclopropyl]alanines and their incorporation into hormaomycin analogues

Beilstein Journal of Organic Chemistry, 2014
Efficient and scalable syntheses of enantiomerically pure (2R,1'S,2'R)- and (2S,1'S,2'R)-3-[2-mono(di,tri)fluoromethylcyclopropyl]alanines 9a–c, as well as allo-D-threonine (4) and (2S,3R)-β-methylphenylalanine (3), using the Belokon' approach with (S ...
Armin de Meijere, Sergei I. Kozhushkov, Dmitrii S. Yufit, Christian Grosse, Marcel Kaiser, Vitaly A. Raev   +5 more
doaj   +1 more source

Studien zur Biidung von Cyclopropan- und Oxiran-Derivaten in der Dreikomponentenreaktion von Basen, α-Halogen-acrylsäure-derivaten und Carbonylverbindungen

CHIMIA, 1975
The competitive formation of oxiranes 1 and cyclopropanes 2 in the reaction of 2-halogeno-acrylic acid-derivatives, carbonyl-compounds and bases is discussed.
R. Scheffold, P. Bissig, K.L. Ghatak, B. Granwehr, B. Patwardhan   +4 more
doaj   +1 more source

Catalytic Generation of Cationic Gold Carbene Complexes From 7‐Alkynylnorbornadienes and Their Intermolecular Cyclopropanation With Alkenes

Chemistry – A European Journal, EarlyView.
Efficient cationic gold(I)‐catalyzed intermolecular cyclopropanation of 7‐alkynylnorbornadiene derivatives has been developed. This methodology offers the synthesis of a new class of norbornene derivatives in high yield with excellent diastereoselectivity.
Kento Ishida, Kenta Toei, Fumiaki Tomi, Norio Sakai   +3 more
wiley   +1 more source

Studies on the Diastereoselective Preparation of Bis-cyclopropanes

, 2016
The identification of two natural products, FR-900848 and U-106305, has stimulated interest concerning the relationship between configurational isomerism, conformational isomerism, and biological activity of polycyclopropanes.
Christopher A. Verbicky (3025374), Cory R. Theberge (1514743), Charles K. Zercher (2032786)   +2 more
core   +2 more sources

Oxidative Generation and Reactivity of the Cyclopropyl Radical From a Martin Silicate

Chemistry – A European Journal, EarlyView.
A photoredox strategy employing Martin silicates enables the oxidative generation and controlled capture of cyclopropyl radicals, including the naked one, long considered challenging intermediates. The method affords functionalized cyclopropanes through both Giese‐type additions and dual nickel/photoredox C(sp3)−C(sp2) cross‐couplings.
Amal Lakhal, Alexandre Millanvois, Louis Fensterbank, Cyril Ollivier   +3 more
wiley   +1 more source

New chemistry of donor-acceptor cyclopropanes [PDF]

, 2004
textDonor-Acceptor (DA) cyclopropanes are considered to be well-understood compounds with predictable chemistry. This dissertation focuses on our recent advances and synthetic applications of DA cyclopropanes principally involving 1,3-dipole ...
Yu, Ming
core  

Synthetic Applications of Carbohydrate-derived Donor-Acceptor Cyclopropanes

, 2016
In this account, we elaborate our group's contribution towards understanding the chemistry of carbohydrate-derived donor-acceptor (DA) cyclopropanes. Our work was mainly focused on the ring opening of these versatile chiral synthons under the influence ...
Sridhar, Perali Ramu, Chandrasekaran, Srinivasan, Ganesh, Venkataraman   +2 more
core   +1 more source

Clathrate hydrate crystallization

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley   +1 more source