Results 111 to 120 of about 10,179 (225)

a structure-activity correlation [PDF]

, 2015
The polymerization of octamethylcyclotetrasiloxane (D4) is investigated using several five-, six- and seven-membered N-heterocyclic carbenes (NHCs). The catalysts are delivered in situ from thermally susceptible CO2 adducts.
Buchmeiser, Michael R., Klein, Johannes, Naumann, Stefan, Wang, Dongren   +3 more
core   +1 more source

Transaminase and Norcoclaurine Synthase One‐Pot Cascades Towards (1S)‐Tetrahydroisoquinolines

ChemBioChem, Volume 27, Issue 6, 27 March 2026.
A TAm‐NCS cascade towards THIQs has been established, starting from amines with the in situ production of aldehydes. The cascade was used with a variety of nonfunctionalized and functionalized amines, and reaction conditions modified to enhance formation of the desired cross‐products.
Jianxiong Zhao, Yeke Ni, Yu Wang, John M. Ward, Jack W. E. Jeffries, Helen C. Hailes   +5 more
wiley   +1 more source

Dynamic Covalent Polymeric Foams: En Route to a Sustainable Lightness

ChemSusChem, Volume 19, Issue 5, 13 March 2026.
Dynamic covalent polymer foams (DCPFs) combine lightweight cellular structures with adaptive polymer networks, enabling self‐healing, reprocessability, and recyclability. By integrating reversible covalent bonds into foam architectures, these materials open new pathways toward sustainable porous polymers within a circular materials economy.
Antoine Adjaoud, Anaë Girault‐Fodil, Farida Baraka, Pierre Verge   +3 more
wiley   +1 more source

Use of Novel Homochiral Thioureas Camphor Derived as Asymmetric Organocatalysts in the Stereoselective Formation of Glycosidic Bonds

Molecules
We synthesized six new camphor-derived homochiral thioureas 1–6, from commercially available (1R)-(−)-camphorquinone. These new compounds 1–6 were evaluated as asymmetric organocatalysts in the stereoselective formation of glycosidic bonds, with 2,3,4,6 ...
Mildred López, Gabriela Huelgas, Mario Sánchez, Adalid Armenta, Angel Mendoza, José Daniel Lozada-Ramírez, Cecilia Anaya de Parrodi   +6 more
doaj   +1 more source

One‐Pot Transition‐Metal‐Free Methods for the Synthesis of All Three Bonds of the Alkyne's Triple Bond

Chemistry – A European Journal, Volume 32, Issue 10, 9 March 2026.
One‐pot transition‐metal‐free methods for the synthesis of all three bonds of the alkyne's triple bond are reviewed. After analysis of several named reactions and discussion of improvements, recent advances in the synthesis of alkynes are discussed. Each section contains a proposed reaction mechanism and analysis of the strengths and weaknesses of the ...
Eugene Kim, Yu Wu, Judith N. Currano, Jianyou Mao, Patrick J. Walsh   +4 more
wiley   +1 more source

Design and Synthesis of Oxazoline-Based Scaffolds for Hybrid Lewis Acid/Lewis Base Catalysis of Carbon–Carbon Bond Formation [PDF]

, 2016
A new class of hybrid Lewis acid/Lewis base catalysts has been designed and prepared with an initial objective of promoting stereoselective direct aldol reactions.
Benoit, Adam R., Dockendorff, Chris, Porter, Jacob D., Shanaa, Alaa, Virdi, Rajdeep S., Wiedenhoeft, Dennis, Wu, Yibiao   +6 more
core   +1 more source

Chiral Potassium Brønsted Base‐Catalyzed Stereoselective Synthesis of 1,3‐Diols via a Tandem Allylic Isomerization/Asymmetric Aldol–Tishchenko Reaction

Advanced Synthesis &Catalysis, Volume 368, Issue 5, 3 March 2026.
Chiral potassium base catalysts featuring 1,1´‐bi‐2‐naphthol‐derived chiral crown ethers as ligands promote a tandem allylic isomerization/asymmetric aldol‐Tishchenko reaction of allylic alcohols and aldehydes. This method provides enantioenriched 1,3‐diols with excellent diastereoselectivity and high enantioselectivity, thereby expanding the synthetic
Hiroki Ishikawa, Masahiro Sai
wiley   +1 more source

Catalytic Asymmetric Synthesis of gem‐Dicyano‐Spirocyclopropyl Oxindoles by N‐9‐Anth‐PyBidine‐Co(OAc)2: Advantage of Three‐Component Coupling Approach

ChemistryEurope, Volume 4, Issue 3, March 2026.
Chiral gem‐dicyano‐spirocyclopropyl oxindoles are obtained by a chiral N‐9‐Anth‐PyBidine‐Co(OAc)2‐catalyzed asymmetric Michael/alkylation reaction of 3‐chlorooxindoles with alkylidenemalononitriles. The three‐component coupling reaction of 3‐chlorooxindoles, aldehydes, and malononitrile shows the advantage of not requiring the preparation of ...
Takaaki Saito, Ren Miyasaka, Kazumasa Kon, Yuri Takagi, Takayoshi Arai   +4 more
wiley   +1 more source

SPECIFIC “IONIC LIQUIDS” AS NEW ORGANOCATALYSTS OF BIGINELLI REACTION [PDF]

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2008
New ionic liquids bearing an imidazolium core with a carboxy group have been prepared in an attempt to design new organocatalysts of Biginelli reaction. Trends in the properties of these compounds are discussed.
Viorica Sargarovschi, Eugenia Styngach, Fliur Macaev   +2 more
doaj  

An ultra-low thiourea catalyzed strain-release glycosylation and a multicatalytic diversification strategy

Nature Communications, 2018
Non-covalent glycosyl donor activation often requires high organocatalyst loadings. Here, the authors demonstrate that strain-release glycosylations can take place at very low thiourea catalyst loadings.
Chunfa Xu, Charles C. J. Loh
doaj   +1 more source