Synthesis of novel dinuclear complexes of Fe(O) derived from 1,2-dicarbonylic monohydrazones

Synthesis of three novel dinuclear complexes of Fe(O) are reported. The were prepared by reaction of the corresponding monohydrazones with Fe-2(CO)(9). The structures of the complexes were determined by IR,H-1 and C-13-NMR and HR-MS

Oxidative coupling-type mechanism of N,N-dialkylanilines in solvent-free conditions forming crystal violet derivatives. A clay-mediated and microwave-promoted approach

In the clay-mediated reaction of N,N-disubstituted anilines using microwave radiation as an energy source in the absence of solvent, crystal violet and derivatives, diphenylmethanes, and biphenyls were isolated along with intermediates supporting an oxidative coupling-type mechanism

Orthopalladacycles derived from alpha-diphenylhydrazonoketene dithioacetals and their reactivity with terminal alkynes

In this paper, we present the synthesis and characterization of new orthopalladated complexes derived from alpha-diphenylhydrazonoketene dithioacetals. From their reaction with terminal alkynes, the intermediates of the expected C-sp-C(sp2)coupling reaction were isolated in stable form and their structures were confirmed by X-ray diffraction studies. (C) 2004 Elsevier B.V. All rights reserved

Unusual nucleophilic versus electrophilic aromatic substitution on nitroanilines

The reaction of the regioisomeric nitroanilines with KI and HNOs/bentonite system using microwave energy in solvent-free conditions is reported. In accordance with the obtained results, an unusual competence between nucleophilic aromatic substitution versus electrophilic aromatic substitution was detected. With the para isomer two products were obtained, one for each reaction typ

Assessment of amination reactions via nucleophilic aromatic substitution using conventional and eco-friendly energies

The efficiency of conventional heating energy source compared with Infrared (IR), Ultrasound (US), Microwave and the simultaneous combination US–IR eco-friendly approaches for preparation of new N-(5-R1 -amino-2-nitrophenyl)acetamides and 5-R1-amino-2-nitroaniline by Nucleophilic Aromatic Substitution (SNAr) via addition–elimination reactions on the halogens F, Cl, Br, I, employing amines as nucleophiles were explored. Moreover, phenyldiazenyl derivatives in good yields by an oxidative one-pot SNAr-based amination reaction from an unusual oxidation of 2-phenylhydrazinyl derivatives in DMSO was prepared