β-Lactam-synthon-interceded diastereoselective synthesis of novel thioxo-imidazolines: a convenient access to functionally decorated 4,5-dihydro-imidazoles
摘要:
The manuscript describes a facile synthesis of an equimolar diastereomeric mixture of 2-thioxo-imidazolines via beta-lactam synthon approach using racemic N-aryl beta-lactams. The diastereoselectivity in the reaction has been introduced by initially synthesizing 3-isothiocyanato-beta-lactams with methoxide assisted amidolysis and intramolecular cyclization. The synthesized diastereoselective trans-2-thioxo-imidazolines were easily converted into diversely functionalized 4,5-dihydro-imidazoles through usual synthetic transformations without the aid of any protic or Lewis acid conditions. (C) 2011 Elsevier Ltd. All rights reserved.
One-pot, three-component synthesis of highly functionalized pyrimidone derivatives and access to indole fused pyrimidones via palladium-catalyzed intramolecular Heck reaction
作者:Ming Lei、Wan Tian、Wei Li、Ping Lu、Yanguang Wang
DOI:10.1016/j.tet.2014.04.023
日期:2014.6
A simple and facile approach to highly functionalized pyrimidone derivatives and indole fused pyrimidones has been developed. The synthesis of substituted pyrimidone derivatives in moderate to good yields involves [4+2] cycloaddition of 1,4-dipoles generated from α,β-unsarurated imines and dimethyl acetylenedicarboxylate (DMAD) with isocyanates as dipolarophiles. Furthermore, the pyrimidones resulted
One-pot, three-component synthesis of highly functionalized 1,3-oxazine derivatives from α,β-unsaturated imine, alkyne, and aldehyde
作者:Ming Lei、Zujin Zhan、Wan Tian、Ping Lu
DOI:10.1016/j.tet.2012.02.041
日期:2012.4
The 1,4-dipoles generated from imines and DMAD have been shown to react efficiently with benzylaldehyde dipolarphiles in one-pot [4+2] annulation resulting in the diversity oriented synthesis of 1,3-oxazine derivatives in good to excellent yields.
Synthesis of β-Phosphinolactams from Phosphenes and Imines
作者:Xingyang Fu、Xinyao Li、Jiaxi Xu
DOI:10.1021/acs.orglett.1c03182
日期:2021.11.19
Various cis-β-phosphinolactams are synthesized stereoselectively for the first time fromimines and diazo(aryl)methyl(diaryl)phosphine oxides under microwave irradiation. Diazo(aryl)methyl(diaryl)phosphine oxides first undergo the Wolf rearrangement to generate phosphenes. Imines nucleophilically attack the phosphenes followed by an intramolecular nucleophilic addition via less steric transition states
Application of magnetic Fe<sub>3</sub>O<sub>4</sub>nanoparticles as a reusable heterogeneous catalyst in the synthesis of β-lactams containing amino groups
作者:Aleme Moslehi、Maaroof Zarei
DOI:10.1039/c9nj02759a
日期:——
The catalytic activity of magnetic Fe3O4nanoparticles to promote the reduction of β-lactams containing nitroaryl groups to β-lactams containing aminoaryl groups in ethanol was reported. This methodology is convenient and green.
Antileishmanial, Antimicrobial and Antifungal Activities of Some New Aryl Azomethines
作者:Yasser M.S.A. Al-Kahraman、Hassan. M.F. Madkour、Dildar Ali、Masoom Yasinzai
DOI:10.3390/molecules15020660
日期:——
A series of eighteen azomethines has been synthesized by the reaction of appropriate primary aromatic amines with aryl and/or heteroaryl carboxaldehydes. The synthesized azomethines have been evaluated for their in vitro antileishmanial, antibacterial and antifungal activities. The results revealed some antifungal activity of most of the synthesized compounds, whereas the antileishmaniasis activity results highlighted that all synthesized azomethines inhibited parasite growth and most of them showed highly potent action towards Leishmania major promastigotes. No remarkable bactericidal activities were observed.
合成了一系列十八种腙,由适当的主要芳香胺与芳香和/或杂芳香羧醛反应得到。合成的腙已被评估其体外抗利什曼病、抗菌和抗真菌活性。结果显示大多数合成化合物具有一定的抗真菌活性,而抗利什曼病活性结果则突显所有合成腙均抑制寄生虫生长,其中大多数对利什曼ia major 前鞭毛体表现出高度的有效性。未观察到显著的杀菌活性。