B2O3/Al2O3 as a new, highly efficient and reusable heterogeneous catalyst for the selective synthesis of β-enamino ketones and esters under solvent-free conditions
Boron oxide adsorbed on alumina (B2O3/Al2O3 ) has been found to be a new and highly efficient heterogeneous catalyst for the synthesis of β-enaminoketones and esters by the enamination of various primary and secondary amines with β-dicarbonyl compounds under solvent-free conditions. The important features of this methodology are broad substrate scope, high yield, no requirement of metal catalysts
1,5-Benzodiazepine derivatives as potential antimicrobial agents: design, synthesis, biological evaluation, and structure–activity relationships
作者:Lan-Zhi Wang、Xiao-Qing Li、Ying-Shuang An
DOI:10.1039/c5ob00655d
日期:——
36 novel 1,5-benzodiazepine derivatives were synthesized and evaluated for their in vitro antimicrobial activity. The results revealed that most of the 1,5-benzodiazepine derivatives exhibited considerable potency against all of the tested strains.
Efficient Synthesis and Biological Evaluation of a Novel Series of 1,5-Benzodiazepine Derivatives as Potential Antimicrobial Agents
作者:Ying-shuang An、Zhen-fang Hao、Xiu-jun Zhang、Lan-zhi Wang
DOI:10.1111/cbdd.12739
日期:2016.7
A series of novel 1,5‐benzodiazepine derivatives were rationally designed and synthesized following the principle of the superposition of bioactive substructures by the combination of 1,5‐benzodiazepine, pyridine (phenyl), and an ester group. The structures of the target compounds were determined by 1H NMR, 13C NMR, MS, IR, and elemental analysis. All the synthesized compounds were evaluated for their
按照1,5-苯并二氮杂,、吡啶(苯基)和酯基的生物活性亚结构叠加原理,合理设计和合成了一系列新型1,5-苯并二氮杂pine衍生物。目标化合物的结构通过1 H NMR,13 C NMR,MS,IR和元素分析确定。所有合成的化合物对抗菌活性进行了评价在体外对真菌新生隐球菌,隐球菌临床分离株(ATCC 32264),白色念珠菌(ATCC 10231),革兰氏阴性菌的大肠杆菌(ATCC 44752),和革兰氏阳性金黄色葡萄球菌(ATCC 25923)。生物活性测定的结果表明,大多数被测化合物对被测微生物的生长均表现出不同的抑制作用。所有活性化合物均显示出比抗菌活性更好的抗真菌活性。值得注意的是,化合物2b中显示出最高的活性(MIC 30 = μ针对克/毫升)隐球菌和(MIC = 31 μ针对克/毫升)隐球菌临床分离株。此外,化合物2a还显示出优异的抗新孢子虫和新孢子虫临床分离株的活性,最低抑菌浓度为35和36μg
Expedient green-chemistry approaches for a one-pot synthesis of two series of novel 1,5-benzodiazepines <i>via</i> domino reactions
作者:Hai-tao Wu、Lan-zhi Wang
DOI:10.1039/c9nj06332c
日期:——
approaches have been developed for the one-potsynthesis of two series of novel 1,5-benzodiazepines 4 and 5. The CeCl3-KI promoted two-component domino reaction of 1,2-phenylenediamines with 1,3-acetonedicarboxylate in ethanol afforded novel 1,5-benzodiazepin-2-ones 4. An expedient approach to 1,5-benzodiazepines 5 has also been developed via three-component domino reactions using 1,2-phenylenediamines, 1