Results 41 to 50 of about 1,875 (207)

A NOVEL RING TRANSFORMATION OF NITROPYRIMIDINONE LEADING TO POLYFUNCTIONALIZED PYRIDONES

, 2007
Polyfunctionalized 2-pyridones are readily prepared by the ring transformation using 3-methyl-5-nitropyrimidin-4(3H)-one with active methylene compounds in the presence of ...
NISHIWAKI, Nagatoshi, MATSUSHIMA, Kazuo, MORIMURA, Hiromi, TAMURA, Mina, ARIGA, Masahiro   +4 more
core   +1 more source

Efficient synthesis of polyfunctionalized carbazoles and pyrrolo[3,4-c]carbazoles via domino Diels–Alder reaction

Beilstein Journal of Organic Chemistry, 2021
The p-TsOH-catalyzed Diels–Alder reaction of 3-(indol-3-yl)maleimides with chalcone in toluene at 60 °C afforded two diastereoisomers of tetrahydropyrrolo[3,4-c]carbazoles, which can be dehydrogenated by DDQ oxidation in acetonitrile at room temperature ...
Ren-Jie Fang, Chen Yan, Jing Sun, Ying Han, Chao-Guo Yan   +4 more
doaj   +1 more source

Acridine yellow G as a photo-induced electron transfer catalyzed radical [4 + 2] aza-Diels-Alder annulation of imines

Results in Chemistry
For the preparation of polyfunctionalized piperidine scaffolds, a radical tandem five-condensation domino Knoevenagel-intramolecular [4 + 2] aza-Diels-Alder imin-based reaction was used.
Farzaneh Mohamadpour
doaj   +1 more source

Novel tetronamides derived from mucobromic acid: synthesis, structural elucidation, DFT calculations and phytotoxic activity

Pest Management Science, EarlyView.
The acyclic mucobromic acid, activated by (1S)‐(+)‐10‐camphorsulfonic acid, afforded the chiral compound 1b, precursor for aza‐Michael addition/elimination on the butenolide yielding tetronamides 2b‐7b. Their relative SRSR configuration was confirmed by the spectrometric methods, DFT calculation and statistical methods.
Kamylla CF Faria, Vitor C Baia, Elson S Alvarenga   +2 more
wiley   +1 more source

One-Pot Synthesis of Polyfunctionalized Isoxazol(in)es¹

, 2016
One-Pot Synthesis of Polyfunctionalized Isoxazol(in ...
Yasuo Tohda (3046575), Masahiro Ariga (1837369), Noriko Asaka (3046566), Nagatoshi Nishiwaki (1662046), Tomoko Nogami (3046560), Takayasu Kawamura (3047496)   +5 more
core   +1 more source

Green approaches for the synthesis of poly-functionalized imidazole derivatives: A comprehensive review

Current Research in Green and Sustainable Chemistry, 2021
The naturally occurring five-member imidazole derivatives have shown interesting biological as well as physiochemical properties and consequently they have found several chemicals, optical, pharmaceutical, and other useful biological applications.
Geetika Patel, Devendra Kumar Dewangan, Nikita Bhakat, Subhash Banerjee   +3 more
doaj   +1 more source

Exploring the Fragmentation of Sodiated Species Involving Covalent‐Bond Cleavages for Metabolite Characterization

Rapid Communications in Mass Spectrometry, EarlyView.
ABSTRACT Rationale Electrospray (ESI), the most popular desorption/ionization technique used in mass spectrometry‐based metabolomics, generates both protonated and deprotonated molecules, as well as adduct ions, sodium being the most frequent monoatomic cation entering their composition.
Annelaure Damont, Ekaterina Darii, Chenqin Cao, Anaïs Legrand, Alain Perret, Sylvain Dechaumet, Amina S. Woods, Christophe Junot, Jean‐Claude Tabet, François Fenaille   +9 more
wiley   +1 more source

Gold(I)-Catalyzed Aromatization: Expeditious Synthesis of Polyfunctionalized Naphthalenes

iScience, 2019
Summary: A gold-catalyzed 6-endo-dig carbocyclization of alkyne with the pendent diazo group is reported. It provides an expeditious approach for the synthesis of multi-functionalized naphthalene derivatives under mild conditions.
Cheng Zhang, Kemiao Hong, Shanliang Dong, Chao Pei, Xiaolu Zhang, Ciwang He, Wenhao Hu, Xinfang Xu   +7 more
doaj   +1 more source

Stereoselective Synthesis of Bridged Azepine Derivatives via Polyfunctionalized Spiroannulated Thiophene. Novel Rearrangement of Oxime Esters

, 2016
Stereoselective Synthesis of Bridged Azepine Derivatives via Polyfunctionalized Spiroannulated Thiophene.
Jacek Grochowski (3028836), Agnieszka Obara (3028839), Barbara Rys (1528537), Krystyna Bogdanowicz-Szwed (3028842), Paweł Serda (2028958)   +4 more
core   +1 more source

Synthesis of Polyfunctionalized Pyrroles by a PPh3-Promoted Condensation Reaction Between Ammonium Acetate, Dialkyl Acetylenedicarboxylate and Arylglyoxals [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2017
A simple and efficient synthesis of some polyfunctionalized pyrrole derivatives by a triphenylphosphine-promoted condensation reaction between dialkyl acetylenedicarboxylates, arylglyoxals, and ammonium acetate is described.
Hossein Anaraki-Ardakani, Parisa Nkomanesh   +1 more
doaj