119216-06-7Relevant academic research and scientific papers
Ag-catalyzed decarboxylative acylation of pyridazines using α-keto acids in aqueous media
Wang, Shengqiang,Xu, Xiaobo,Zou, Dapeng,Xu, Qijie
supporting information, (2020/12/21)
An efficient and general protocol for Ag-Catalyzed decarboxylative acylation of pyridazines using α-keto acids as acylation reagent in aqueous media has been described. This method provides a new avenue for the synthesis of diverse array of acylated pyridazines with different substitution patterns. The reaction proceeds smoothly in water under mild conditions and exhibits a good functional group tolerance.
Benzoyl pyridazine derivative and preparation method thereof
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Paragraph 0065-0096; 0115; 0120, (2020/09/23)
The invention relates to a benzoyl pyridazine derivative and a preparation method thereof, and belongs to the technical field of pyridazine compound synthesis. The benzoyl pyridazine derivative disclosed by the invention has a structure as shown in a form
α-Chlorobenzylation of Nitroarenes via Vicarious Nucleophilic Substitution with Benzylidene Dichloride: Umpolung of the Friedel-Crafts Reaction
Brze?kiewicz, Jakub,Loska, Rafa?,Makosza, Mieczys?aw
, p. 8499 - 8508 (2018/06/25)
Readily available α,α-dichlorotoluenes enter a vicarious nucleophilic substitution (VNS) reaction with electron-deficient arenes to give α-chlorobenzylated nitrobenzenes, as well as six- and five-membered heterocycles. Oxidation of the initially formed α-chlorobenzylic carbanions instead of protonation results in formation of diaryl ketones, providing a means for overall nucleophilic C-H benzoylation of electron-deficient aromatic rings. Alternatively, benzoylated nitroarenes can be obtained via the reaction of isolated α-chlorodiarylmethanes with sodium azide.
Air-stable solid aryl and heteroaryl organozinc pivalates: Syntheses and applications in organic synthesis
Manolikakes, Sophia M.,Ellwart, Mario,Stathakis, Christos I.,Knochel, Paul
supporting information, p. 12289 - 12297 (2015/03/31)
A wide range of air-stable, solid, polyfunctional aryl and heteroarylzinc pivalates were efficiently prepared by either magnesium insertion or Hal/Mg exchange followed by transmetalation with Zn(OPiv)2 (OPiv=pivalate). By reducing the amount of
Novel access to 1,4-benzodiazepin-2-ones via the Buchwald reaction and application to the synthesis of novel heterocyclics
Salomé, Christophe,Schmitt, Martine,Bourguignon, Jean-Jacques
, p. 1033 - 1035 (2012/03/26)
A new two step strategy for the preparation of 1,4-benzodiazepin-2-ones has been developed starting from the 2-halogenobenzophenone under Buchwald conditions (Pd(OAc)2, XantPhos, Cs2CO3, dioxane 100 °C). This strategy has
Efficient mono- and bis-functionalization of 3,6-dichloropyridazine using (tmp)2Zn·2MgCl2·2LiCl
Wunderlich, Stefan,Knochel, Paul
supporting information; experimental part, p. 6387 - 6389 (2009/04/13)
3,6-Dichloropyridazine undergoes a smooth metallation using (tmp) 2Zn·2MgCl2·2LiCl. The resulting bis-organozinc species react with various electrophiles; subsequent functionalization via a second metallation proceeds readily; further reactions with hydrazine lead to highly substituted pyrazolo[3,4-c]pyridazines derivatives. The Royal Society of Chemistry 2008.
Metallation of Diazines II. First Metallation of Pyridazine, Metallation of 2,4-Dichloropyrimidine
Turck, A.,Ple, N.,Mojovic, L.,Queguiner, G.
, p. 1377 - 1381 (2007/10/02)
3,6-Dichloropyridazine was ortho-lithiated by lithium 2,2,6,6-tetramethylpiperidide.The resulting lithio compound was reacted with carbonyl derivatives iodine, iodine and trimethylchlorosilane.An azaxanthone was synthesized.An unusual regioselectivity for the lithiation of 2,4-dichloropyrimidine was studied.
Synthesis of New Aryl (3,6-Dichloro-4-pyridazinyl) Ketones and their Reaction with N,N-Dinucleophiles
Eichhorn, Thomas A.,Piesch,Steffen,Ried, Walter
, p. 988 - 991 (2007/10/02)
The synthesis of new aryl (3,6-dichloro-4-pyridazinyl)ketones 3a-e via Friedel-Crafts acylation of the aromatic compounds 2a-e with 3,6-dichloro-4-pyridazinecarbonyl chloride (1) is described.The ketones 3a-e are cyclized with N,N-dinucleophilic reagents to the 3-aryl-5-chloro-1H-pyrazolopyridazines 4a-d, and 3a-c are converted into the 3-aryl-5-chloro-1H-pyrazolopyridazin-1-ethanols 5a-c and to the hitherto unknown ring system of the 5-aryl-3-chloro-7,8-dihydro-9H-pyridazinodiazepines (6a-c).
