Abstract A simple and efficient method for preparation of imines by the oxidative coupling of benzyl alcohols with aromatic amines or aliphatic amines was developed. The reaction was catalyzed by 9-azabicyclo[3.3.1]nonan-N-oxyl (ABNO)/KOH with air as the economic and green oxidant. Under the optimal reaction conditions, a variety of imines were obtained in 80%-96% isolated yields.
Synthesis and Characterization of Rh<sup>III</sup>–M<sup>II</sup> (M = Pt, Pd) Heterobimetallic Complexes Based on a Bisphosphine Ligand: Tandem Reactions Using Ethanol
作者:Zeinab Mandegani、Asma Nahaei、Mahshid Nikravesh、S. Masoud Nabavizadeh、Hamid R. Shahsavari、Mahdi M. Abu-Omar
DOI:10.1021/acs.organomet.0c00594
日期:2020.11.9
these tandem reactions. All reactions proceeded smoothly in air at 80–90 °C. The RhIII–PdII complex showed superior catalytic performance in comparison to the RhIII–PtII complexes, its monometallic counterparts, and mixtures of monometallic (RhIII + PdII) complexes. The result demonstrates a cooperative effect between the Rh and Pd metal centers. A mechanism for the catalytic tandem reactions was investigated
1,1-双(二苯基膦基)甲烷(dppm)被用作连接体配体,用于制备一系列异双金属Rh III -Pt II和Rh III -Pd II配合物。这些配合物通过几种分析和光谱学方法表征。这些异双金属配合物的催化活性在三个不同的串联反应中进行:即转移氢化(TH)/脱卤化(DH),TH / Suzuki-Miyaura偶联以及苄醇与硝基苯的偶联以形成Schiff碱。乙醇既用作溶剂,又用作廉价的TH试剂,在这些串联反应中,底物范围广。所有反应均在80–90°C的空气中顺利进行。RhIII -Pd II复合物显示相比于铑优良的催化性能III -Pt II复合物,其单金属对应物,和单金属的混合物(铑III +钯II)配合物。结果证明了Rh和Pd金属中心之间的协同作用。研究了催化串联反应的机理。发现酒精介质和碱是必不可少的。
Highly Stereoselective Synthesis of Saccharin-Substituted β-Lactams via in Situ Generation of a Heterosubstituted Ketene and a Zwitterionic Intermediate as Potential Antibacterial Agents
作者:Zahra F. A. Mortazavi、Mohammad R. Islami、Moj Khaleghi
DOI:10.1021/acs.orglett.5b01309
日期:2015.6.19
Highly stereoselective synthesis of saccharin derivatives containing functionalized 2-azetidinone moiety was achieved starting from saccharin as an available precursor. The approach to these valuable heterocyclic scaffolds involves a formal [2π + 2π] cycloaddition between Schiffbases and the saccharinylketene as a novel ketene which was generated in situ and an electrocyclic reaction of a zwitterionic
Stereoselective Synthesis of 3-(5-Benzoyl-1-methyl-1H-pyrrol-2-yl)-2-azetidinone Derivatives via an in Situ Generated Ketene
作者:Mohammad Islami、Behjat Bananezhad
DOI:10.1055/s-0036-1558974
日期:2017.7
A short route toward β-lactams from tolmetin has been developed. In the key step, a ketene was generated on the C-2 of pyrrole ring and reacted with aromatic imines to form trans-β-lactams as the only observed products. The identification of the ketene was confirmed by reaction with the stable free radical TEMPO (TO·).
已经开发了一条从托美汀到 β-内酰胺的短途路线。在关键步骤中,在吡咯环的 C-2 上生成乙烯酮并与芳族亚胺反应形成反式-β-内酰胺作为唯一观察到的产物。通过与稳定的自由基 TEMPO (TO·) 的反应证实了乙烯酮的鉴定。
An Efficient Method for the Synthesis of Indolo[3,2-<i>c</i>]quinoline Derivatives Catalyzed by Iodine
作者:Yujing Zhou、Meimei Zhang、Mingyue Yin、Xiangshan Wang
DOI:10.1002/cjoc.201200993
日期:2013.2
The reaction of Schiff base and indole catalyzed by iodine in DMA, subsequently treated with DDQ, gave indolo[3,2‐c]quinoline derivatives in good yields. The structure of 3e was confirmed by X‐ray diffraction analysis.
碘在DMA中催化席夫碱和吲哚的反应,随后用DDQ处理,得到的吲哚[3,2- c ]喹啉衍生物收率很高。X射线衍射分析证实了3e的结构。