Results 31 to 40 of about 1,246 (202)

Enhancement of the Enantioselectivity in Lipase-Catalyzed Kinetic Resolutions of 3-Phenyl-2H-azirine-2-methanol by Lowering the Temperature to −40 °C

, 2016
Enhancement of the Enantioselectivity in Lipase-Catalyzed Kinetic Resolutions of 3-Phenyl-2H-azirine-2-methanol by Lowering the Temperature to −40 °
Tadashi Ema (1581424), Takashi Sakai (2209168), Isamu Kawabata (3041010), Tetsuo Kishimoto (3041013), Masanori Utaka (3029424)   +4 more
core   +1 more source

2‑Diazoacetyl‑2H‑azirines: Source of a Variety of 2H‑Azirine Building Blocks with Orthogonal and Domino Reactivity

, 2018
A synthesis of 2-diazoacetyl-2H-azirines was developed starting from 2H-azirine-2-carbonyl chlorides, generated by Fe­(II)-catalyzed isomerization of 5-chloroisoxazoles. 2-Diazoacetyl-2H-azirines easily undergo reactions characteristic of α-diazo ketones
Pavel A. Sakharov (5519120), Alexander F. Khlebnikov (1537960), Mikhail S. Novikov (1537957)   +2 more
core   +2 more sources

Bildung eines Azacyclols durch transanulare Ringkontraktion

CHIMIA, 1988
Reaction of 3-dimethylamino-2,2-dimethyl-2H-azirine (1) with phthalimide (8) in polar solvents yields the (1:1)-adduct 2-dimethylamino-9b-hydroxy-3,3-dimethyl-5,9b-dihydro-3H-imidazo[2,1-a]isoindol-5-one (10).
Marlise Schläpfer-Dähler, Roland Prewo, Jost H. Bieri, Gabriel Germain, Heinz Heimgartner   +4 more
doaj   +1 more source

Anti-Inflammatory Dysidazirine Carboxylic Acid from the Marine Cyanobacterium Caldora sp. Collected from the Reefs of Fort Lauderdale, Florida

Molecules, 2022
Dysidazirine carboxylic acid (1) was isolated from the lipophilic extract of a collection of the benthic marine cyanobacterium Caldora sp. from reefs near Fort Lauderdale, Florida. The planar structure of this new compound was determined by spectroscopic
Sarath P. Gunasekera, Sofia Kokkaliari, Ranjala Ratnayake, Thomas Sauvage, Larissa A. H. dos Santos, Hendrik Luesch, Valerie J. Paul   +6 more
doaj   +1 more source

Asymmetric Synthesis of β-Substituted α-Amino Acids Using 2H-Azirine-2-carboxylate Esters. Synthesis of 3,3-Disubstituted Aziridine-2-carboxylate Esters^†

, 2016
Asymmetric Synthesis of β-Substituted α-Amino Acids Using 2H-Azirine-2-carboxylate Esters. Synthesis of 3,3-Disubstituted Aziridine-2-carboxylate Esters†
Chang-Hsing Liang (2989692), Franklin A. Davis (2108398), Hu Liu (176964)   +2 more
core   +1 more source

Investigation on the reactivity of α-azidochalcones with carboxylic acids: Formation of α-amido-1,3-diketones and highly substituted 2-(trifluoromethyl)oxazoles

Beilstein Journal of Organic Chemistry, 2015
The reaction of α-azidochalcones with carboxylic acids has been investigated resulting in the formation of α-amido-1,3-diketones under microwave irradiation via in situ formation of 2H-azirine intermediates.
Kandasamy Rajaguru, Arumugam Mariappan, Rajendran Suresh, Periasamy Manivannan, Shanmugam Muthusubramanian   +4 more
doaj   +1 more source

Neuere Methoden zur Ringerweiterung organischer Verbindungen

CHIMIA, 1980
The actual interest in the construction of cyclic compounds via ring expansion reactions is demonstrated in the first chapter by means of typical examples.
Heinz Heimgartner
doaj   +1 more source

Kristallstruktur eines 2-Dimethylamino-3,3-dimethyl-4(3H)-pyridons

CHIMIA, 1982
3-Dimethylamino-2,2-dimethyl-2H-azirine (1) reacts with alkyl phenyl substituted cyclopropenones 2 in benzene at 130 °C to give a mixture of the two isomeric 4(3H)-pyridones 3 and 4, resulting from a nucleophilic attack at C(2) and C(1) of the ...
Jost H. Bieri, Roland Prewo, Heinz Heimgartner   +2 more
doaj   +1 more source

Ethyl 3-(2-pyridyl)-2H-azirine-2-carboxylate : synthesis and reactivity with dienes [PDF]

, 2004
Ethyl 3-(2-pyridyl)-2H-azirine-2-carboxylate, the first example of an 3-heteroamatic-2H-azirine, was prepared and its reaction with conjugated 1,3-dienes, under mild conditions and in the absence of Lewis acid catalyst, produced cycloadducts in good ...
Alves, M. José, Fortes, A. Gil, Martins, Cristina I., Lemos, Américo, M. Alves, A. Gil Fortes, Américo Lemos, Cristina Martins   +7 more
core   +1 more source

Diverse reactivity of maleimides in polymer science and beyond

Polymer International, Volume 74, Issue 4, Page 296-306, April 2025.
This mini‐review provides a thorough overview of maleimide chemistry, highlighting its diverse reactivity in polymer and materials science applications. Abstract Maleimides are remarkably versatile functional groups, capable of participating in homo‐ and copolymerizations, Diels–Alder and (photo)cycloadditions, Michael additions, and other reactions ...
Bruce E Kirkpatrick, Kristi S Anseth, Tayler S Hebner   +2 more
wiley   +1 more source