75872-31-0Relevant academic research and scientific papers
N-Heterocyclic Carbene-Catalyzed Oxidative Annulations of α,β-Unsaturated Aldehydes with Hydrazones: Selective Synthesis of Optically Active 4,5-Dihydropyridazin-3-ones and Pyridazin-3-ones
Mao, Jian-Hui,Wang, Zi-Tian,Wang, Zhan-Yong,Cheng, Ying
, p. 6350 - 6359 (2015)
A novel and efficient method for the highly enantioselective synthesis of chiral 4,5-dihydropyridazin-3-one derivatives has been developed based on the chiral N-heterocyclic carbene-catalyzed oxidative annulation between α,β-unsaturated aldehydes and hydrazones. Meanwhile, the selective synthesis of either 4,5-dihydropyridazin-3-ones or pyridazin-3-one derivatives from the same reactants has been achieved by simply varying catalytic and reaction conditions.
Reaction of triethyl phosphonoacetate anion with phenylhydrazones: A new method for the preparation of 3(2H)-pyridazinones
Patel,Vyas,Pandey,Tavares,Fernandes
, p. 1021 - 1026 (2007/10/02)
Various 5,6-disubstituted-2-phenyl-3(2H)-pyridazinones 4 have been synthesised by reacting triethyl phosphonoacetate anion with monophenylhydrazone of 1,2-dicarbonyl compounds 2.
A new and convenient synthesis of 3(2H)-pyridazinones by reacting carbanion of ethyl trimethylsilylacetate with phenylhydrazones
Patel,Vyas,Pandey,Tavares,Fernandes
, p. 1935 - 1940 (2007/10/02)
A one-pot synthesis of 5,6-disubstituted-2-phenyl-3(2H)-pyridazinones 4 is achieved on treatment of carbanion of ethyl trimethylsilylacetate with phenylhydrazones of 1,2-dicarbonyl compounds 1.
Cumulated Ylides, XIV - Phosphacumulene Ylides - Building Blocks for the Synthesis of Heterocyclic Compounds
Bestmann, Hans Juergen,Schmid, Guenter,Sandmeier, Dieter,Schade, Gerold,Oechsner, Helmut
, p. 1709 - 1719 (2007/10/02)
Phosphacumulene ylides 1 and acidic compounds 4 combine to give phosphoranes 5, which cyclize by an intramolecular reaction (mostly Wittig reaction) with formation of heterocycles 7.
Stickstoff- und Schwefelheterocyclen aus NH- und SH-aciden Carbonylverbindungen und Phosphacumulenyliden
Bestmann, Hans Juergen,Schmid, Guenter,Sandmeier, Dieter
, p. 2939 - 2942 (2007/10/02)
Phosphacumulenylide reagieren mit 1,2,3-Tricarbonyl-2-phenylhydrazonen zu Pyridazinderivaten, mit β-Ketoenaminen zu Pyridindionabkoemmlingen und mit α-Ketothiocarbonsaeureamiden zu Verbindungen der Dihydrothiophendion-Reihe.
