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Carbon-carbon and carbon-heteroatom bond-forming reactions are main interest to organic synthesis. Different types of reactions such as polar, pericyclic and radical reactions have been employed by organic chemists for the construction of carbon-carbon and carbon-heteroatom bonds. Amination is the process by which an amino group is introduced into an organic molecule. Most commonly, amination reactions involve the use of the amine as the nucleophile and the organic compound as the electrophile [1]. However, this sense of reactivity may be reversed for some electron-deficient amines, including oxaziridines, hydroxylamines, oximes and other NO substrates. Electrophilic amination [2] involving the formation of a carbon-nitrogen bond through the reaction of a nucleophilic carbanion with an electrophilic source of nitrogen [3,4]. The electrophilic α-amination of carbonyl compounds is widely used for the preparation of natural or unnatural α-amino acids and α-amino alcohols [5]. Aminating agents such as azidodicarboxylates [6], nitroso compounds or oxaziridines are typically used as electrophilic nitrogen source [7]. The addition of β-keto esters to azodicarboxylates is one of the preferred method for electrophilic amination [8,9]. Herein we present the addition of azodicarboxylates to 1,3-dicarbonyl compounds and β-keto esters in presence of the simple organic catalyst, 1,8-diazobicyclo[5.4.0]undec-7-ene (DBU). EXPERIMENTAL Melting points were recorded on a Büchi melting point apparatus and are uncorrected. NMR spectra were recorded at A Facile Synthesis of α α α α α-Hydrazino Ketones from 1,3-Dicarbonyl Compounds Using 1,8-Diazobicyclo[5.4.0]undec-7-ene (DBU) as Organic Catalyst

Biocarbon (BC) supported iron–cobalt–nickel (Fe–Co–Ni/BC) nanoalloy catalysts were synthesized by ultrasonic-assisted chemical reduction method. The morphological and physico-chemical characteristics show that the 1:1:1 composition of Fe–Co–Ni/BC catalyst has the Fe face-centered cubic (fcc) solid-solution structure showing the incorporation of Co and Ni. The electrocatalytic execution of this iron-based nanoalloy catalyst and its interaction with biocarbon was explored in a membraneless fuel cell and compared with carbon supported Fe–Co–Ni catalyst (Fe–Co–Ni/C). In a single-cell test, the power density obtained for Fe–Co–Ni/BC (35.4 mW/cm2) was better than that of Fe–Co–Ni/C (31.3 mW/cm2), utilizing 0.1 mol/L sodium perborate as oxidant and 1 mol/L ethylene glycol as fuel in an alkaline medium. The electrochemical findings revealed that the execution and solidness of the Fe–Co–Ni/BC catalyst is good and prevalent to that of Fe–Co–Ni/C catalyst. The better execution of BC-supported catalyst is due to its high electrical conductivity, high porosity and expansive surface area. It is been concluded that both the advantageous impact and the nature of support have an imperative part on the execution of Fe–Co–Ni/BC nanoalloy catalysts for the CO2-free ethylene glycol oxidation. Subsequently, it is accepted that the BC-supported Fe–Co–Ni nanoalloy catalysts are anticipated to be broadly utilized in electrocatalytic energy-conversion applications.