使用[3 + 2]环加成法合成了六种新的基于异喹啉的稠合化合物(具有吡咯并[2,1- a ]异喹啉结构的化合物5a–c和具有咪唑并[2,1- a ]异喹啉骨架的化合物6a–c)。在几个原位中生成的环亚铵盐生成丙酸乙酯或氰基甲酸乙酯。所有合成的化合物都通过UV-VIS吸收,稳定和时间分辨的荧光方法在溶液中进行了研究。已经证明了取代基对光谱特性的影响。这些衍生物显示出在360至420 nm之间的强烈发射。吡咯并异喹啉衍生物在二甲基亚砜(DMSO)中的发射量子产率(Φ= 0.54-0.64)显着高于咪唑并喹啉(0.03-0.16)。异喹啉衍生物的荧光衰减遵循双指数定律。观察到这些异喹啉衍生物对氢氧化钠的明显反应。
Hemoglobin-Catalyzed Synthesis of Indolizines Under Mild Conditions
作者:Fengxi Li、Xuyong Tang、Yaning Xu、Chunyu Wang、Liu Zhang、Jiaxin Zhang、Jiaxu Liu、Zhengqiang Li、Lei Wang
DOI:10.1002/ejoc.201901591
日期:2019.12.19
Hemoglobins were used to catalyze the multicomponent synthesis of indolizines. Satisfactory yields and mild reaction conditions make this method highly useful for practical applications. Furthermore, this study provides a new example of a hemoglobin‐catalyzed organic reaction and is expected to expand the utilization of hemoglobin in organic synthesis.
In Situ Generation of Quinolinium Ylides from Diazo Compounds: Copper-Catalyzed Synthesis of Indolizine
作者:Rongxiang Chen、Yanwei Zhao、Hongmei Sun、Ying Shao、Yudong Xu、Meihua Ma、Liang Ma、Xiaobing Wan
DOI:10.1021/acs.joc.7b01042
日期:2017.9.15
The Cu-catalyzedthree-component reaction between quinolines, diazo compounds, and alkenes has been established for direct construction of indolizine derivatives via quinolinium ylides. This methodology is distinguished by the use of a commercially inexpensive catalyst and readily available starting materials, wide substrate scope, and operational simplicity.
Synthesis of Indolizines from Pyridinium Salts and Ethyl Bromodifluoroacetate
作者:Xiaoya Hou、Sen Zhou、Yuli Li、Minjie Guo、Wentao Zhao、Xiangyang Tang、Guangwei Wang
DOI:10.1021/acs.orglett.0c03540
日期:2020.12.4
Here we present a novel annulation of pyridinium salts with BrCF2CO2Et to access the indolizine derivatives with high efficiency. The α substitution of pyridine plays a key role in determining the reaction pathways. Various types of indolizines can be conveniently accessed from easily available pyridinium salts under mild and simple reaction conditions.
在这里,我们提出了一种新型的吡啶盐与BrCF 2 CO 2 Et的环化方法,以高效地获得吲哚嗪衍生物。吡啶的α取代在确定反应途径中起关键作用。在温和而简单的反应条件下,可以从容易获得的吡啶鎓盐中方便地获得各种类型的吲哚嗪。