Mercuration of Schiff bases of substituted benzylideneanilines
作者:Kuiling Ding、Yangjie Wu、Hongwen Hu、Lianfang Shen、Xin Wang
DOI:10.1021/om00059a058
日期:1992.11
As part of an effort to investigate substituent effects on the intramolecular coordination between N and Hg, the mercuration of 36 substituted benzylideneanilines was studied. The structure characterization of the products by IR, H-1 NMR, C-13 NMR, and MS indicates that for all of the reactions examined, the mercury is directed to the ortho position of the N-phenyl ring or the para position of the N-phenyl ring when these sites are not occupied by a substituent. The position of the HgCl group in the mercurated product of N-(4-nitrobenzylidene)-beta-naphthylamine has been confirmed by single-crystal X-ray determination, which also provided circumstantial evidence for the existence of the N--> Hg intramolecular coordination with a four-membered ring. The possible mechanism of the reaction was proposed, in which the mercuration at the ortho position of the N-phenyl ring was facilitated by the imino moiety upon formation of a coordination complex with Hg(OAc)2 in the first step, followed by a subsequent electrophilic substitution at the ortho position of the N-phenyl ring. This reaction is different from the metalation of benzylideneanilines by transition metals, in which the metal atom is usually directed to the ortho position of the C-phenyl ring, and provides a new example of the so-called 'cyclometalation" reaction.
JOHNSTON D.; SMITH D. M.; SHERHERD SHEPHERD (IN PART); THOMPSON D., J. CHEM. SOC. PERKIN TRANS.,(1987) N 3, 495-500
作者:JOHNSTON D.、 SMITH D. M.、 SHERHERD SHEPHERD (IN PART)、 THOMPSON D.
DOI:——
日期:——
Indazolin-<i>s</i>-ylidene–N-Heterocyclic Carbene Complexes of Rhodium, Palladium, and Gold: Synthesis, Characterization, and Catalytic Hydration of Alkynes
properties of these complexes were modified by the introduction of different substituents at the coordinated NHC ligands. Catalytic properties of the goldcomplex were evaluated in the hydration of alkynes to give the corresponding ketone products. This new type of gold N-heterocyclic carbenecomplex showed a high catalytic activity in the hydration of alkyne at roomtemperature.
Solvent-free synthesis of nitrobenzyl Schiff bases: Characterization, antibacterial studies, density functional theory and molecular docking studies
作者:Tunde L. Yusuf、Segun D. Oladipo、Sulaimon A. Olagboye、Sizwe J. Zamisa、Gideon F. Tolufashe
DOI:10.1016/j.molstruc.2020.128857
日期:2020.12
Abstract Three (3) Schiff bases; (E)-1-(2-nitrophenyl)-N-(o-tolyl)methanimine (1), (E)-2-isopropyl-N-(2-nitrobenzylidene)aniline (2),(E)-2-((2-nitrobenzylidene)amino)phenol (3) were synthesized in solvent-free approach and characterized using 1H and 13C NMR, UV–visible, FT-IR, mass spectrometry and purity confirmed by elemental analysis. The structure of 1 was determined by single-crystal X-ray diffraction