4 + 1 Radical annulations with isonitriles: a simple route to cyclopenta-fused quinolines
作者:Dennis P. Curran、Hui Liu
DOI:10.1021/ja00006a033
日期:1991.3
this first example of a 4+1 radical annulation includes the following: (1) radical addition to an isonitrile, (2) cyclization of the resulting imidoyl radical to the alkyne, (3) addition of the so-formed vinyl radical to the aromatic ring, and (4) rearomatization. When substituted isonitriles (p-F p-OMe, m-F) are employed, the major unrearranged products are accompanied by 7-30% or rearranged products
1-取代的 5-碘-1-戊炔、5 当量的苯基异氰化物和 1.5 当量的六甲基二锡在 150 o C 的叔丁基苯 (0.01-0.025 M) 中的太阳灯照射产生 9-取代的 2,3-二氢-1H -cyclopenta [b] 喹啉的产率为 36-70%。4+1 自由基环化的第一个例子的机制建议包括以下内容:(1) 自由基加成到异腈,(2) 所得亚胺酰基自由基环化到炔烃上,(3) 加成如此形成的乙烯基芳环上的自由基,和(4)重构化。当使用取代的异腈(pF p-OMe,mF)时,主要的未重排产物伴随有 7-30% 或重排产物。提出的中间体的独立生成表明,重排产物是通过乙烯基自由基的初始闭合形成五元环而产生的,
Application of Ugi three component reaction for the synthesis of quinapril hydrochloride
作者:Bhushan B. Borase、Himanshu M. Godbole、Girij P. Singh、Pritesh R. Upadhyay、Anurag Trivedi、Varadaraj Bhat、Gautham G. Shenoy
DOI:10.1080/00397911.2019.1682168
日期:2020.1.2
concise synthesis of chirally pure quinapril hydrochloride is described. The key step is the formation of α-amino amide backbone in one step using Ugi threecomponentreaction. This method allows short access to α-amino amide chain which is a part of many drugs used for treatment of high blood pressure. A large molecular library can be synthesized by changing the components in Ugi reaction. GRAPHICAL
Chromene, Quinoline Hybrids as Potential Anti-Cancer Agents: A Novel and Distinct Approach for the Synthesis of Quinoline Derivatives
作者:Rizuana Sultana、Ravinder Reddy Tippanna
DOI:10.2174/1570178617666200122095829
日期:2021.3
A series of novel quinoline derivatives (6-phenyl-6H-chromeno[4,3-b]quinoline) have been prepared by using 4-chloro-2-phenyl-2H-chromene-3-carbaldehyde and various substituted isocyanides as starting materials in the presence of HClO4-SiO2 and Methanol. We screened eighteen compounds of this novel series (6a-r) in six different cancer cell lines (A549 (lung cancer cells), DU145 (prostate cancer cells)
advantages of our methodology include an increased synthesis speed, very mild conditions giving access to hitherto unknown or highly reactive classes of isocyanides, rapid access to large numbers of functionalized isocyanides, increased yields, high purity, proven scalability over 5 orders of magnitude, increased safety and less reaction waste resulting in a highly reduced environmental footprint. For example