Results 81 to 90 of about 8,323 (256)

Synthesis of azetidines by aza Paternò–Büchi reactions

open access: yesChemical Science, 2020
This review discusses the current scope and limitations of the [2 + 2] photocycloaddition reaction between an imine and an alkene component, the aza Paternò–Büchi reaction, and highlights recent improvements within this area of research.
Alistair D Richardson   +2 more
semanticscholar   +1 more source

Palladium-Catalyzed Oxidation of β-C(sp3)-H Bonds of Primary Alkylamines through a Rare Four-Membered Palladacycle Intermediate. [PDF]

open access: yes, 2020
Site-selective functionalizations of C-H bonds are often achieved with a directing group that leads to five- or six-membered metallacyclic intermediates. Analogous reactions that occur through four-membered metallacycles are rare. We report a challenging
Bunescu, Ala   +5 more
core   +1 more source

Synthesis of 3-Aryl-1-aminopropane Derivatives:Lithiation-Borylation-Ring-Opening of Azetidinium Ions [PDF]

open access: yes, 2016
In situ generated 2-phenyl-azetidinium ylides react with boronic esters to form acyclic γ-dimethylamino tertiary boronic esters. The transformation is believed to involve the formation of a zwitterionic boronate, which subsequently undergoes ring-opening
Aggarwal, Varinder K   +2 more
core   +2 more sources

Aziridines and azetidines: Building blocks for polyamines by anionic and cationic ring-opening polymerization

open access: yesPolymer Chemistry, 2019
The synthesis of aziridine and azetidine monomers and their ring-opening polymerization via different mechanisms is reviewed.
Gleede, T.   +5 more
core   +2 more sources

Synthesis and antiviral activity of novel spirocyclic nucleosides [PDF]

open access: yes, 2018
The synthesis of a number of spirocyclic ribonucleosides containing either a triazolic or azetidinic system is described, along with two analogous phosphonate derivatives of the former.
Abdulsattar, Ban O.   +9 more
core   +1 more source

Cobalt‐Salen Catalysed Hydration of Alkenes With Water: A Complementary Ionic Approach to the Mukaiyama Hydration

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 5, 3 March 2026.
A cobalt‐salen catalysed hydration of olefins with water is reported, resulting in Markovnikov alcohol products. The reaction proceeds rapidly under mild conditions and exhibits excellent functional group tolerance, supporting a wide range of styrenyl and non‐activated alkenes.
David G. Groves   +3 more
wiley   +1 more source

Pyrolysis of azetidinone derivatives: a versatile route towards electron-rich alkenes, C-1 allylation and/or homologation of aldehydes [PDF]

open access: yes, 2014
Pyrolysis of beta-lactams and beta-thiolactams led essentially to stereoselective synthesis of the high energy electron-rich Z-alkenes. Extension of this methodology to the pyrolysis of 3-allyloxy derivatives gave a simple direct route to the ...
Al-Awadi, Nouria A.   +4 more
core   +2 more sources

Use of functionalized β-lactams as building blocks in heterocyclic chemistry [PDF]

open access: yes, 2010
beta-Lactams represent flexible building blocks suitable for the preparation of a large variety of nitrogen-containing target compounds. In the present study, the formerly neglected synthetic potential of 4-haloalkyl-beta-lactams has been elaborated in ...
D'hooghe, Matthias   +3 more
core   +2 more sources

Sulfur Ylides in Skeletal‐Editing—Ring Expansion Reactions

open access: yesHelvetica Chimica Acta, Volume 109, Issue 3, March 2026.
Sulfur ylides (S‐ylides) are emergent diazo surrogates that enable skeletal editing and ring expansion with safer handling and broad functional group tolerance. This perspective covers pioneer works and highlights recent advances in the field, while outlining key challenges and future directions that may redefine the role of S‐ylides in modern ...
Arsala Kamal   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy