From CO<sub>2</sub> to 4<i>H</i>-Quinolizin-4-ones: A One-Pot Multicomponent Approach via Ag<sub>2</sub>O/Cs<sub>2</sub>CO<sub>3</sub> Orthogonal Tandem Catalysis
作者:Chao-Chen Dong、Jun-Feng Xiang、Li-Jin Xu、Han-Yuan Gong
DOI:10.1021/acs.joc.8b01206
日期:2018.8.17
report relatively simple and cost-effective orthogonal tandem catalysis, namely Ag2O in conjunction with Cs2CO3 serves to promote a multicomponent tandem reaction forming two new C–C and one new C–N bonds. 4H-Quinolizin-4-ones, key skeletal components in a variety of biologically active molecules, were obtained with yields up to 99%. The present approach features a broad substrate scope and mild reaction
本文使用二氧化碳作为C1的前体,我们报告了相对简单且经济高效的正交串联催化,即Ag 2 O与Cs 2 CO 3结合可促进多组分串联反应,形成两个新的C–C和一个新的C– N个债券。获得了4 H -Quinolizin-4-ones,这是多种生物活性分子中的关键骨架成分,产率高达99%。本方法具有广泛的底物范围和温和的反应条件,并受益于使用具有成本效益的反应和催化剂。
Structure and Dynamics of Hydrogen Chelates. Part 1. NMR-spectroscopic studies in the quinazoline-2-acetonitrile series
作者:Holger Gehring、Ewald Daltrozzo
DOI:10.1002/hlca.19980810206
日期:1998.2.4
To get informations on both the structure and dynamics of hydrogen chelates 1 of heteroaromatic systems, a great variety of quinazoline-2-acetonitrile chelates were synthesized (see 2–4). Similarly to the situation of the corresponding H-chelates in the pyrimidine-2-acetonitrile series, the investigation of these new derivatives 2–4 by NMR spectroscopic methods (DNMR, COSY, NOESY, ROESY, EXSY, HMQC
One-Pot Synthesis of 3-Substituted 4<i>H</i>-Quinolizin-4-ones via Alkyne Substrate Control Strategy
作者:Ji-Wang Fang、Fang-jie Liao、Yang Qian、Chao-Chen Dong、Li-Jin Xu、Han-Yuan Gong
DOI:10.1021/acs.joc.0c02484
日期:2021.2.19
Three-substituted 4H-quinolizin-4-ones were obtained via a facile method with good selectivity and high efficiency. On the basis of alkyne substrate control, the mild and cost-efficient reaction has a broad substrate scope (20 examples, up to 93% yield) and is also easy to scale up. Active sites on the products allow for further modifications. The alkyne substrate control strategy could be further
通过简便的方法以良好的选择性和高效率获得了三取代的4 H-喹啉嗪-4-酮。在炔烃底物控制的基础上,温和且经济高效的反应具有广泛的底物范围(20个实例,产率高达93%),并且也易于扩大规模。产品上的活动站点允许进一步修改。炔烃底物的控制策略可以进一步扩展,以实现更复杂的三取代的4 H -quinolizin-4-one骨架。
POLYMERS FUNCTIONALIZED WITH HETEROCYCLIC NITRILE COMPOUNDS
申请人:Luo Steven
公开号:US20090099325A1
公开(公告)日:2009-04-16
A method for preparing a functionalized polymer, the method comprising the steps of preparing a reactive polymer and reacting the reactive polymer with a heterocyclic nitrile compound.
A method for producing a functionalized polymer, the method comprising the steps of: (i) preparing a bulk polymerization system including a reactive polymer by introducing a lanthanide-based catalyst and a conjugated diene monomer; (ii) adding a heterocyclic nitrile compound the polymerization system including the reactive polymer to prepare polymerization system including a functionalized polymer; and (iii) adding a protic compound to the polymerization system including a functionalized polymer where the ratio of water or protic hydrogen atoms in the protic compound to the lanthanide atoms in the lanthanide-based catalyst is at least 1500 to 1.
一种生产官能化聚合物的方法,该方法包括以下步骤(i) 通过引入镧系催化剂和共轭二烯单体,制备包括反应性聚合物的大块聚合体系; (ii) 向包括反应性聚合物的聚合体系中加入杂环腈化合物,制备包括官能化聚合物的聚合体系; 以及 (iii) 向包括官能化聚合物的聚合体系中加入原生化合物,其中原生化合物中的水或原生氢原子与镧系催化剂中的镧系原子之比至少为 1500 比 1。