Nitrones Research Articles

Chemo-, regio-, and stereoselectivity in 1,3-dipolar cycloaddition of piperine with nitrones. A cycloadditive route to aminoalcohols

The chemoselective 1,3-dipolar cycloaddition between piperine and nitrones and further transformation of the cycloadducts to novel acyclic 1,3-amino alcohols.

Reaction of a Lappaconitine Nitrone with Acrylamides and N-Vinylpyrrolidone

Reaction of a Lappaconitine Nitrone with Acrylamides and N-Vinylpyrrolidone

Reaction of a Lappaconitine Nitrone with Allylamines

Reaction of a Lappaconitine Nitrone with Allylamines

Front Picture: α,β‐Unsaturated Amides as Dipolarophiles: Catalytic Asymmetric exo‐Selective 1,3‐Dipolar Cycloaddition with Nitrones (Chem. Eur. J. 51/2017)

Front Picture: α,β‐Unsaturated Amides as Dipolarophiles: Catalytic Asymmetric <i>exo</i>‐Selective 1,3‐Dipolar Cycloaddition with Nitrones (Chem. Eur. J. 51/2017)

Monomeric, dimeric and tetrameric triazoles which also include nitrones_esi

Monomeric, dimeric and tetrameric triazoles which also include nitrones_esi

ChemInform Abstract: Construction of 2,3,4,7‐Tetrahydro‐1,2,4,5‐oxatriazepines via [4 + 3] Cycloadditions of α‐Halogeno Hydrazones with Nitrones.

ChemInform Abstract: Construction of 2,3,4,7‐Tetrahydro‐1,2,4,5‐oxatriazepines via [4 + 3] Cycloadditions of α‐Halogeno Hydrazones with Nitrones.

Two new beta carboline type alkaloids from Dicorynia guianensisheartwood

The chemical investigations of Dicorynia guianensis heartwood led to the isolation of four new indole alkaloids for the first time in this plant. Compound (1) identified as spiroindolone 20,30,40,90-tetrahydrospiro [indoline-3,10pyrido[3,4-b]-indol]-2-one, and compound (3) described as nitrone 1-methyl-4,9-dihydro-3H-pyrido [3,4-b] indole 2-oxide and were isolated for the first time as natural products. ABTS antioxidant activity guided their isolation.

ChemInform Abstract: A Cycloaddition—Cyclization Combined Approach to Enantiopure 3‐Glycinyl‐4‐hydroxypyrrolidines and 3‐Substituted 4‐Hydroxyprolines.

Abstract1,3‐Dipolar cycloaddition of a (‐)‐menthone derived nitrone as glycine equivalent with (E)‐ or (Z)‐1,4‐dichloro‐2‐butene affords bis(chloromethyl) substituted isoxazolidine cycloadducts.

ChemInform Abstract: 1,3‐Dipolar Cycloadditions of Fluorinated Nitrones with Thioketones.

AbstractReadily available fluorinated nitrones (IV) and (XIV) are used in 1,3‐dipolar cycloadditions with thioketones affording 1,4,2 oxathiazolidines in a regioselective manner.

ChemInform Abstract: A Facile Synthesis of New Substituted Spiropyrimidine‐2,4‐diones.

AbstractNovel spiropyrimidine‐2,4‐dione derivatives (II) are synthesized using a regiospecific sequence consisting of a 1,3‐dipolar cycloaddition with nitrones followed by a cyclization.

ChemInform Abstract: Organocatalyzed Synthesis of Isoxazolidin‐5‐ones: The Meldrum′s Acid Approach.

AbstractMeldrum′s acid is a useful ketene equivalent in the reaction with nitrones to give isoxazolidin‐5‐ones, via a domino anionic formal [3 + 2] cycloaddition‐decarboxylation process.

ChemInform Abstract: Substituent‐Controlled Domino‐Henry‐hetero Diels—Alder Reaction: Synthesis of Polycyclic Nitronates.

AbstractThe reaction of chromone‐3‐carbaldehydes (I) with nitromethane under conditions A) yields only functionalized nitroalkenes instead of the expected nitronates.

Intermolecular Gold-Catalyzed Diastereo- and Enantioselective [2+2+3] Cycloadditions of 1,6-Enynes with Nitrones

Goldene Addition: Die Gold-katalysierte Titelreaktion kann auf einen großen Substratbereich von 1,6-Eninen und Nitronen angewendet werden (siehe Schema; DCE=1,2-Dichlorethan, Tf=Trifluormethansulfonyl). Auch eine enantioselektive Variante wurde entwickelt. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

SmI2-Mediated Cross-Coupling of Nitrones and Imines with Allenoates

SmI2-Mediated Cross-Coupling of Nitrones and Imines with Allenoates

ChemInform Abstract: C‐[o‐(p‐Tolyl)sulfinyl]phenylnitrones. Synthesis and Reactivity in [3 + 2] Dipolar Cycloadditions.

AbstractTitle nitrones (III) react with different dipolarophiles to afford corresponding isoxazolidines.

Exploring α-Chromonyl Nitrones as 1,5-Dipoles

Exploring α-Chromonyl Nitrones as 1,5-Dipoles

Spin Capturing with “Clickable” Nitrones: Generation of Miktoarmed Star Polymers

A novel nitrone (α-4-(3-(trimethylsilyl)prop-2-ynyloxy)-N-tert-butyl nitrone) with an alkyne “click” function is synthesized and employed in enhanced spin capturing polymerization (ESCP) as well as...

Formal [3+2] Cycloaddition with in situ Generated N-Carbamoyl Nitrones

Formal [3+2] Cycloaddition with in situ Generated <i>N</i>-Carbamoyl Nitrones

Diastereoselectivity in the Cycloaddition of 1‐Benzyl‐2‐piperazinone Nitrone with Alkenes.

AbstractFor Abstract see ChemInform Abstract in Full Text.

Diastereoselectivity in the Cycloaddition of 1-Benzyl-2-piperazinone Nitrone with Alkenes

The diastereoselectivity of the [2 + 3]-cycloaddition of 1-benzyl-2-piperazinone nitrone with several alkenes has been examined. exo-Type cycloadducts predominated for most substrates.