Results 51 to 60 of about 12,893 (216)

Catalytic Asymmetric Defluorinative Allylation of Silyl Enol Ethers [PDF]

, 2023
The stereocontrolled installation of alkyl fragments at the alpha position of ketones is a fundamental yet unresolved transformation in organic chemistry.
Albert, Moyano, Javier, Mateos, Xavier, Companyó, Jordi, Duran, Jordi Duran, Xavier Companyó, Albert Moyano, Javier Mateos   +7 more
core   +2 more sources

Conversion of α-Diazoketones into 1-Bromo-2-alkyl- or 2-arylpent-4-en-2-ols using Tin-Mediated Allylation/Propargylation

SynOpen, 2023
High-yielding and mild conditions are used to prepare of 1-bromo-2-alkyl- or 2-arylpent-4-en-2-ols/1-bromo-2-alkyl- or 2-arylpent-4-yn-2-ols from α-diazoketones.
Swapan Kumar Biswas, Sipak Joyasawal
doaj   +1 more source

Design and synthesis of propellane derivatives and oxa-bowls via ring-rearrangement metathesis as a key step

Beilstein Journal of Organic Chemistry, 2015
Various intricate propellane derivatives and oxa-bowls have been synthesized via a ring-rearrangement metathesis (RRM) as a key step starting from readily accessible starting materials such as p-benzoquinone, 1,4-naphthoquinone and 1,4-anthraquinone.
Sambasivarao Kotha, Rama Gunta
doaj   +1 more source

Chiral Diol-Based Organocatalysts in Enantioselective Reactions

Molecules, 2018
Organocatalysis has emerged as a powerful synthetic tool in organic chemistry in the last few decades. Among various classes of organocatalysis, chiral diol-based scaffolds, such as BINOLs, VANOLs, and tartaric acid derivatives, have been widely used to ...
Truong N. Nguyen, Po-An Chen, Krit Setthakarn, Jeremy A. May   +3 more
doaj   +1 more source

C‐Terminal Functionalization Methods of Amino Acids, Peptides, and Proteins

Chemistry – A European Journal, EarlyView.
C‐terminal functionalization offers powerful routes to peptide and protein diversification, yet epimerization, hydrolysis, and selectivity remain key challenges. This Review surveys enzymatic, decarboxylative, and condensation strategies, highlighting advances toward chemo‐ and regioselective, protecting‐group‐free, atom‐efficient methods applicable to
Jay Hanssens, Mark Lambers, Romano V. A. Orru, Jordy M. Saya   +3 more
wiley   +1 more source

Palladium-catalyzed allylation of norbornadiene: Experimental and quantum chemical research

Тонкие химические технологии, 2023
Objectives. Catalytic processes involving norbornadiene (NBD) and norbornene (NBN) derivatives provide exceptional opportunities for the synthesis of a wide range of carbocyclic hydrocarbons.
S. A. Durakov, K. T. Egiazaryan, R. S. Shamsiev, V. R. Flid   +3 more
doaj   +1 more source

Copper-Catalyzed Enantioselective Allyl–Allyl Cross-Coupling [PDF]

Journal of the American Chemical Society, 2013
A Cu(I)-phosphoramidite-based catalytic system that allows asymmetric allyl-allyl cross-coupling with high enantioselectivity is reported. This transformation tolerates a large variety of functionalized substrates. The versatility of this new reaction is illustrated in the catalytic asymmetric synthesis of the Martinelline alkaloids chromene derivative
Hornillos, Valentin, Perez, Manuel, Fananas-Mastral, Martin, Feringa, Ben L.   +3 more
openaire   +2 more sources

Lignocellulosic Triboelectric Materials for Energy Harvesting and Emerging Applications: A Review on Lignin‐Molecular Engineering toward Improved Performance

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Contrasting sustainable biomass with depleting petroleum resources, this review charts the evolutionary timeline of lignin‐based TENGs. We systematically evaluate their fundamental mechanisms, enhancement strategies, and applications in green self‐powered electronics.
Yuxin Yang, Boyu Du, Yuwen Wang, Tian Tang, Yuxuan Xie, Jiajun Zhang, Yajun Zhang, Jingyu Xu, Xing Wang, Chuanyin Xiong   +9 more
wiley   +1 more source

Organophotoredox/Ni-Cocatalyzed Allylation of Allenes: Regio-, and Diastereoselective Access to Homoallylic Alcohols [PDF]

, 2021
A dual organophotoredox/nickel-catalyzed reductive coupling of allenes with aldehydes has been developed for the rapid assembly of anti-homoallylic alcohols with high levels of regioselectivities (>20:1), and diastereoselectivities (up to >20:1) and ...
Hui, Xie, Bernhard, Breit
core   +1 more source

Carbon‐Supported Catalytic Systems Assembled by π–π Interactions

European Journal of Organic Chemistry, EarlyView.
This review explores the noncovalent immobilization of organic and organometallic catalysts on carbonaceous supports through π–π interactions, highlighting its potential to enhance catalyst recovery, recyclability, and the sustainability of organic synthesis.
Chloé Jamalkhan, Léa Ibos, Sarah Bouery, Veronika Myronova, Anaïs Scuiller, Mohamed Mellah, David Kreher, Emmanuelle Schulz, Olivier R. P. David   +8 more
wiley   +1 more source