57964-87-1Relevant academic research and scientific papers
Copper(II)-catalyzed aerobic oxidation of hydrazides to Azo intermediates and their Diels-Alder versus ene trapping
Chaiyaveij, Duangduan,Whiting, Andrew
supporting information, (2021/12/01)
The oxidation of diethyl 1, 2-hydrazinedicarboxylate using a catalytic Cu(II)-oxazoline system occurs at RT in air, resulting in azo generation, which can then be trapped in situ via hetero-Diels-Alder (HDA) and competitive ene-reactions, with chemoselect
Catalysis with inorganic cations. 2. The effect of some perchlorates on Diels-Alder reaction rates
Casaschi, Adele,Desimoni, Giovanni,Faita, Giuseppe,Invernizzi, Anna Gamba,Lanati, Simonetta,Righetti, PierPaolo
, p. 8002 - 8007 (2007/10/02)
The effects of sodium, lithium, barium, and magnesium perchlorate in acetone solution on the rates of different Diels-Alder reactions were kinetically investigated, 13C-NMR spectroscopy being used as a tool to infer the mechanism of coordination of the solvated cations acting as catalysts. The Diels-Alder reactions, whose rates increase with increasing electrophilic character of the solvent, are strongly accelerated in the presence of the metal cation. The order of the cation activity, Mg2+ > Ba2+ ≥ Li+ > Na+, parallels the order of their respective charge:radius ratios. The Diels-Alder reactions characterized by a nucleophilic or nonspecific solvent effect are nearly insensitive to the presence of any metal cation, since it cannot act as an electrophile. The small increase in the rate of such reactions can be due to nonspecific interactions.
Bridgehead Hydrazines. 4. Oxidative and Basic Ring Cleavage of Pyrazolo- and s-Triazolopyridazines
Sheradsky, Tuvia,Moshenberg, Reuven
, p. 101 - 103 (2007/10/02)
Selenium dioxide oxidation of 2,2-diethyl-5,8-dihydro-diphenylpyrazolopyridazine-1,3-dione (6) resulted in oxidative cleavage of the pyrazole ring.Treatment of 6 and of its s-triazolo analogue 5 with lithium diisopropylamide resulted in cleavage of
