ABSTRACT A simple, environmentally benign protocol for synthesis of hydrazones from carbonyl compounds and hydrazides has been developed in the presence of meglumine in aqueous-ethanol media at room temperature. The salient features of the present protocol are mild reaction conditions, short reaction time, high yields, operational simplicity, metal-free, applicability toward large-scale synthesis, and biodegradable
Halogen-bonding in 3-nitrobenzaldehyde-derived dichlorodiazadienes
作者:Namiq G. Shikhaliyev、Abel M. Maharramov、Gulnar T. Suleymanova、Gulnara V. Babayeva、Gunay Z. Mammadova、Irada M. Shikhaliyeva、Aliyar A. Babazade、Valentine G. Nenajdenko
DOI:10.24820/ark.5550190.p011.403
日期:——
Organocatalytic asymmetric hydroarylation of o-hydroxyl styrenes via remote activation of phenylhydrazones
作者:Wei Dai、Han Lu、Xiao-Li Jiang、Ting-Ting Gao、Feng Shi
DOI:10.1016/j.tetasy.2014.12.009
日期:2015.2
The first catalytic asymmetric styrene hydroarylation reaction has been established via the enantioselective Friedel-Crafts alkylations of phenylhydrazones with o-hydroxyl styrenes under the catalysis of a chiral phosphoric acid as an organocatalyst, leading to the construction of a chiral 1,1-diarylethane scaffold with high enantioselectivity (up to 89% ee). The investigation on the activation mode suggested that the two reactants, o-hydroxyl styrenes and phenylhydrazones, were simultaneously activated by the catalyst via multiple hydrogen-bonds. The remote activation of the hydrazone functionality by a dual hydrogen-bonding interaction with the catalyst contributed greatly to the hydroarylation reaction of the o-hydroxyl styrenes. (C) 2014 Elsevier Ltd. All rights reserved.
EL-BAHAIE S. A.; EL-LATIF G. ABD; IBRAHIM Y. A., EGYPT. J. CHEM., 28,(1985) N 3, 227-230
作者:EL-BAHAIE S. A.、 EL-LATIF G. ABD、 IBRAHIM Y. A.
DOI:——
日期:——
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2-C-H Acetoxylation of Diversely Substituted (<i>E</i>
)-1-(Arylmethylene)-2-phenylhydrazines Using PhI(OAc)<sub>2</sub>
as Acetoxy Source at Ambient Conditions
作者:Goutam Brahmachari、Indrajit Karmakar
DOI:10.1002/ejoc.201900994
日期:2019.9.15
It's Simple! Catalyst‐ and additive‐free regioselective direct sp2 C–H acetoxylation of biologically interesting aldehyde hydrazones to access a new series of hydrazone acetates has been achieved. The reaction proceeds at ambient temperature employing PIDA as an acetoxy source.