Hydrazones of 4-(Trifluoromethyl)benzohydrazide as New Inhibitors of Acetyl- and Butyrylcholinesterase
作者:Martin Krátký、Katarína Svrčková、Quynh Anh Vu、Šárka Štěpánková、Jarmila Vinšová
DOI:10.3390/molecules26040989
日期:——
Based on the broad spectrum of biological activity of hydrazide–hydrazones, trifluoromethyl compounds, and clinical usage of cholinesteraseinhibitors, we investigated hydrazones obtained from 4-(trifluoromethyl)benzohydrazide and various benzaldehydes or aliphatic ketones as potentialinhibitors of acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). They were evaluated using Ellman’s spectrophotometric
Boron Chelates Derived from <i>N</i>-Acylhydrazones as Radical Acceptors: Photocatalyzed Coupling of Hydrazones with Carboxylic Acids
作者:Igor A. Dmitriev、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1021/acs.orglett.1c03501
日期:2021.11.19
Difluoroboryl complexes obtained from N-acyl hydrazones upon brief treatment with boron trifluoride and allylic silane serve as efficient acceptors of alkyl radicals. The reaction of the boryl chelates with carboxylicacids in the presence of an acridine-type photocatalyst leading to N-acyl hydrazides is described. The efficiency of addition at the C═N bond of the chelates is determined by the formation
Radical “On Water” Addition to the C═N Bond of Hydrazones: A Synthesis of Isoindolinone Derivatives
作者:Tae Kyu Nam、Doo Ok Jang
DOI:10.1021/acs.joc.7b03193
日期:2018.7.20
A radical “on water” addition to the C═Nbond of hydrazones has been described. Hydrazone, diphenylsilane, alkyl iodide, and triethylborane afforded the corresponding addition products “on water” in good yields. A significant solvent effect was observed from the water. The developed protocol can be applied to the synthesis of 3-substituted isoindolinone derivatives. Moreover, the process offers environmentally
Highly enantioselective formal aza-Diels–Alder reactions with acylhydrazones and Danishefsky's diene promoted by a silicon Lewis acid
作者:Sharon K. Lee、Uttam K. Tambar、Nicholas R. Perl、James L. Leighton
DOI:10.1016/j.tet.2010.03.036
日期:2010.6
Silicon Lewis acid 3 is effective for the promotion of highlyenantioselective cycloaddition reactions of acylhydrazones with Danishefsky's diene (formal aza-Diels–Alderreactions). The reactions are conducted at ambient temperature for 15 min, and produce the products in good yield and with high levels of enantioselectivity. A remarkable solvent-dependent reversal in the sense of absolute stereochemical
Facile construction of novel imidazolidine-spirooxindoles via diastereoselective cycloaddition of N-acylhydrazine-derived imines with 3-isothiocyanato oxindoles
presence of 10 mol% of Na2CO3, the desired imidazolidine-spirooxindoles were obtained in 81–99% yield with up to 99 : 1 dr by means of the diastereoselective [3 + 2] cycloaddition of N-acylhydrazine-derived imines with 3-isothiocyanatooxindoles. Single-crystal X-ray structure analysis was conducted to determine the relative stereochemistry of the imidazolidine-spirooxindoles. Diastereoselective access
在存在10 mol%的Na 2 CO 3时,通过衍生自N-酰基肼的非对映选择性[3 + 2]环加成反应,可以81-99%的收率获得所需的咪唑烷-螺氧并吲哚,最高可达99:1 dr。亚胺与3-异硫氰酸根合吲哚。进行了单晶X射线结构分析,以确定咪唑烷-螺氧还吲哚的相对立体化学。拟议的机制假设非对映选择性进入咪唑烷-spirooxindoles。