Results 101 to 110 of about 10,179 (225)

Advances in the Different Synthetic Routes of Fluorinated Hydrazines

The Chemical Record, EarlyView.
This review highlights the various routes to the preparation of fluorinated hydrazines, thereby promoting the exploration of innovative methods for the synthesis of new N‐fluorinated hydrazines. Their synthesis mainly involves synthetic routes such as organometallic, organocatalytic, and photocatalytic.
Dimitra Kyrko, Benoît Crousse
wiley   +1 more source

3,3'-Dibutanoyl-1,1'-(o-phenyl­ene)dithio­urea [PDF]

, 2010
The mol­ecular conformation of the title compound, C16H22N4O2S2, is stabilized by two intramolecular N—H ... O hydrogen bonds. The crystal packing shows N—H ... O and N—H ...
Aamer Saeed, Naeem Abbas, Hummera Rafique, Michael Bolte, Atia, Berkessel, Blessing, Hu, Moloto, Phetsuksiri, Sheldrick, Spek, Succaw   +12 more
core   +1 more source

Nucleophilic substitution of a phthalimidyl group with morpholine in an N1‐methyl‐1,2,3‐triazole: crystallographic evidence for migration of the methylene bridge

Acta Crystallographica Section C, EarlyView.
X‐ray crystallography revealed that the reaction of 2‐{[4‐(4‐bromophenyl)‐1H‐1,2,3‐triazol‐1‐yl]methyl}phthalimide with morpholine led to substitution of the phthalimide group, including migration of the substituent from N1 to N2 on the 1,2,3‐triazole ring.2‐{[4‐(4‐Bromophenyl)‐1H‐1,2,3‐triazol‐1‐yl]methyl}phthalimide, C17H11BrN4O, was synthesized by ...
Paul R. Palme, Richard Goddard, Markus Leutzsch, Adrian Richter, Peter Imming, Rüdiger W. Seidel   +5 more
wiley   +1 more source

Catalytic asymmetric formal synthesis of beraprost

Beilstein Journal of Organic Chemistry, 2015
The first catalytic asymmetric synthesis of the key intermediate for beraprost has been achieved through an enantioselective intramolecular oxa-Michael reaction of an α,β-unsaturated amide mediated by a newly developed benzothiadiazine catalyst.
Yusuke Kobayashi, Ryuta Kuramoto, Yoshiji Takemoto   +2 more
doaj   +1 more source

Perfluoroalkanesulfonamide Organocatalysts for Asymmetric Conjugate Additions of Branched Aldehydes to Vinyl Sulfones

Molecules, 2013
Asymmetric conjugate additions of branched aldehydes to vinyl sulfones promoted by sulfonamide organocatalyst 6 or 7 have been developed, allowing facile synthesis of the corresponding adducts with all-carbon quaternary stereocenters in excellent yields ...
Kosuke Nakashima, Miho Murahashi, Hiroki Yuasa, Mariko Ina, Norihiro Tada, Akichika Itoh, Shin-ichi Hirashima, Yuji Koseki, Tsuyoshi Miura   +8 more
doaj   +1 more source

A Scalable and Resource‐Saving Synthesis of Dipyrromethanes and Tetrapyrroles via Geminal Diethers: Minimal Polymer Formation and Facile Purification

Advanced Synthesis &Catalysis, Volume 368, Issue 7, 1 April 2026.
Geminal dimethoxyethers react with pyrrolic nucleophiles in an efficient and clean reaction under anhydrous, mild conditions, which contrasts with the reactivity of the respective carbonyl compounds. Polymerization is effectively inhibited, providing access to dipyrromethanes, porphyrins, and calix[4]pyrroles that are easily purified.
Janos Wasternack, Clara Schritt, Luca Steiner, Ole Specht, Friedrich Braune, Marius Balizs, Sebastian Müller, Anja Wiesner, Beate Paulus, Siegfried Eigler, Christoph A. Schalley   +10 more
wiley   +1 more source

6,7-Dimethoxy-3-methoxycarbonyl-1-(2-methoxyphenyl)-3,4-dihydroisoquinoline 2-oxide

Acta Crystallographica Section E, 2011
In the title compound, C20H21NO6, an N-oxide-based organocatalyst, the N-containing six-membered ring adopts a twisted half-chair conformation. No hydrogen bonding or π–π stacking was found within the crystal structure.
Tricia Naicker, Thavendran Govender, Hendrik G. Kruger, Glenn E. M. Maguire   +3 more
doaj   +1 more source

Asymmetric synthesis of Rauhut-Currier-type esters via Mukaiyama-Michael reaction to acylphosphonates under bifunctional catalysis [PDF]

, 2018
A highly enantioselective organocatalytic Mukaiyama-Michael reaction of silyloxy dienes and α,β-unsaturated acyl phosphonates under bifunctional organocatalysis is presented.
Alemán, José, Del Río-Rodríguez, Roberto, Díaz-Tendero, Sergio, Fernández-Salas, Jose A., Laina-Martín, Víctor   +4 more
core   +2 more sources

Non‐redox Lewis Acids Supported Pd‐Catalyzed C—C /C—H Activation and Accession to Produce Pharmaceutical Intermediates

ChemistryOpen, Volume 15, Issue 4, April 2026.
Palladium is a simple and versatile redox‐active metal that plays a crucial role in the oxidation reactions for organic synthesis and production of pharmaceutical intermediates. Notably, there has been significant progress with Lewis acids (LAs), which are non‐redox metal ions promoting Pd(II)‐catalyzed oxidation via C—H and C—C bond activation.
Ahmed M. Senan, Senem Akkoc, A. M. Abdulkarem, Sadeq K. Alhag   +3 more
wiley   +1 more source

Mechanistic investigations of polyaza[7]helicene in photoredox and energy transfer catalysis

Beilstein Journal of Organic Chemistry
Organic photocatalysts frequently possess dual singlet and triplet photoreactivity and a thorough photochemical characterization is essential for efficient light-driven applications.
Johannes Rocker, Till J. B. Zähringer, Matthias Schmitz, Till Opatz, Christoph Kerzig   +4 more
doaj   +1 more source