Article
Chemistry, Multidisciplinary
Dong Qiu, Hongyan Ni, Yijin Su
Summary: We reported a mild and metal-free synthesis of indolizines using pyridinium salts and alkenes with ambient air as a sole oxidant. A halogen bond donor was successfully applied to catalyze this oxidative [3+2] annulation. The C-I bond of the halogen bond donor is crucial for this transformation, while the C-Br and C-F bonds gave lower yields. The development of halogen bond catalysis can promote the sustainable synthesis of indolizines.
Article
Chemistry, Organic
Xueting Zhou, Jun Shi, Jun-Rong Song, Wei-Dong Pan, Hai Ren, Wei Wu
Summary: The development of simple-to-operate methods for the preparation of indolizidine derivatives are important. A mild one-pot protocol using NaBH3CN as reductant has been developed for the [3+2] cycloaddition of isoquinolinium/pyridinium ylides and electron-deficient alkenes. The protocol has a broad substrate scope (more than 40 examples) and provides various novel hexahydroindolizidine derivatives in high yields and excellent diastereoselectivities (up to >20/1).
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Xueting Zhou, Jun Shi, Jun-Rong Song, Wei-Dong Pan, Hai Ren, Wei Wu
Summary: The development of a simple and efficient method for preparing indolizidine derivatives is of great importance. A one-pot protocol using NaBH3CN as reductant has been developed for the [3+2] cycloaddition of isoquinolinium/pyridinium ylides and electron-deficient alkenes, providing a wide range of novel hexahydroindolizidine derivatives in high yields and excellent diastereoselectivities.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Yuce Chen, Yuxin Liu, Hongchen Yang, Zhong Li, Xiaoyong Xu
Summary: A facile and efficient method for the synthesis of (methylsulfanyl)indolizine derivatives via oxidative [3+2]-annulation of bis(methylthio)-2-nitroethylen(BMTNE) and pyridinium ylides under K2CO3 was developed. The target products were obtained in moderate to good yields.
JOURNAL OF HETEROCYCLIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Andrey D. Vinokurov, Taygib M. Iliyasov, Kirill A. Karpenko, Alexandra V. Evstigneeva, Alexandra P. Minaeva, Michail N. Elinson, Anatoly N. Vereshchagin
Summary: The Michael-Mannich-cyclization cascade reaction of four compounds leads to the stereoselective formation of halogenides with three stereogenic centers. Ammonium acetate acts as both a base and a nitrogen source.
MENDELEEV COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xue Feng, Jiaxin Tian, Ying Sun, Huayou Hu, Mingzhu Lu, Yuhe Kan, Danjun Fang, Chao Wang
Summary: The study reports a rhodium-catalyzed directing group promoted selective C-H olefination reaction of indolizines at the 8-position, as well as di-olefination at 2,8-positions achieved with silver hexafluoroantimonate as an additive under similar reaction conditions. Weakly coordinating groups, such as ketone, aldehyde, amide, and ester, were used as directing groups, with the ester group being able to be removed under acid conditions and used as a traceless directing group.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Kui-Rong Ma, Jing-Zhou Yin, Hua-You Hu, Yu-He Kan
Summary: Two new zinc coordination polymers were synthesized through hydrothermal method, with one possessing a novel 1-D fishbone-like structure and the other showing a 2-D reticulate layer structure. The organic pyridine rings in the compounds emit fluorescence, contributing to the extension of the compound's structure.
JOURNAL OF CLUSTER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yifa Chen, Yong-Jun Chen, Yuquan Qi, Hong-Jing Zhu, Xianqiang Huang, Yi-Rong Wang, Ru-Xin Yang, Yu-He Kan, Shun-Li Li, Ya-Qian Lan
Summary: A series of lanthanum metal-organic framework-based porous nanospheres have been synthesized and applied as heterogeneous catalysts for efficient ring-opening polymerization (ROP) of gamma-butyrolactone under mild conditions, showing promising results in terms of yield and recyclability. The use of imine-based additives has further improved the performance of the ROP catalysis systems, paving the way for the production of biocompatible and degradable plastics.
Article
Chemistry, Multidisciplinary
He Zhang, Dong-Qing Lin, Wei Liu, Yang-Cheng Wang, Zhu-Xin Li, Dong Jin, Jin Wang, Xin-Wen Zhang, Lei Huang, Sha-Sha Wang, Chun-Xiang Xu, Yu-He Kan, Ling-Hai Xie
Summary: Effective protection against photooxidation of organic wide-bandgap semiconductors is crucial for achieving high efficient deep-blue emission for full color displays. Crystallization can suppress the formation of long-wavelength green band (g-band) defects and enhance the stability of deep-blue emission while blocking the diffusion of O-2 and H2O molecules.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Chao Tang, Jianmei Chen, Zhenghua Zhu, Changdong Shao, Yong Wang, Youhua Chen, Zijie Zhu, Mingxuan Shi, Yue Jin, Hui Yang, Jiujuan Fu, Yuxin Han, Jiayi Hu, Fangfang Wang, Jia Hu, Xudong Cao, Yuhe Kan, Lili Zhang
Summary: Two carbazole or carbazole-3-carbonitrile/pyridine-based bipolar materials were synthesized as hosts for solution-processed sky-blue PhOLEDs and green TADF-OLEDs. Increasing the doping concentration from 10% to 15% slightly reduced the turn-on voltage of the devices based on 2,6-CzPy. Introduction of cyano substituents improved the thermal stability of the hosts, but also resulted in deeper HOMO levels and larger hole injection barriers in CN-2,6-CzPy, which did not contribute to enhanced device performance.
Article
Materials Science, Multidisciplinary
Xin Wen, Wuyan Gu, Changdong Shao, Shizheng Wen, Yuhe Kan
Summary: This study investigated novel Janus dione based HTMs with X-shaped structure using quantum chemical calculations. The results showed that these HTMs have suitable HOMO levels, good optical properties, and satisfactory stability. The calculated hole mobility of these HTMs is significantly higher than that of Spiro-OMeTAD. They are also easy to adsorb on the surface of perovskite material and facilitate charge transfer between surface layers.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yang Liu, Qing-qing Pan, Feng-wei Gao, Ying-chen Duan, Shui-xing Wu, Yu-he Kan, Zhong-min Su
Summary: By using DFT and TD-DFT methods, the relationship between structure and property of a series of homoleptic monocyclic and [2]catenanes gold(i) thiolates was analyzed. It was found that the [2]catenanes are more planar than the monocyclic molecules due to increased Au-S-Au bond angles in Au11 and Au12. The smaller Au-MIDLINE HORIZONTAL ELLIPSISAu contacts enhance the geometrical stability of the structures. The HOMO levels of the [2]catenanes are higher than those of the monocyclic molecules, and their absorption spectra exhibit a redshift consistent with the higher HOMO energy levels.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Organic
Weiming Hu, Jiali Huang, Gang Gao, Wenting Guo, Fujun Yin, Yang Sun, Jingjiao Huang, Chuanzhou Tao, Li Tao, Huayou Hu
Summary: This study presents a palladium-catalyzed dearomatization of indoles with alkynes, which provides an efficient access to synthetically useful spirocyclohexaneindolenines in moderate to good yields. The developed method features a simple catalytic system, operational simplicity, and good functional group compatibility, which significantly contributes to the development of dearomatization for accessing spiro compounds.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Weiming Hu, Jiali Huang, Jingyu Yao, Wenting Guo, Gang Gao, Fujun Yin, Huayou Hu, Xiaoqin Pei, Huiyan Wang, Chuanzhou Tao
Summary: A Pd-catalyzed carbonylative dearomatizationvia an acyl Pd complex has been developed for the construction of diversified carbonyl-containing spirocyclic indolenines with an all-carbon quaternary center in an efficient and straightforward way with good to excellent yields. The protocol features a simple catalytic system, operational simplicity, a broad substrate scope, easy scale-up, and versatile transformations. In addition, the asymmetric reaction was initially explored with moderate enantioselectivity.
Article
Chemistry, Multidisciplinary
Changdong Shao, Tianyi Xu, Chen Chen, Qionglin Yang, Chao Tang, Ping Chen, Mingzhu Lu, Zhengsong Hu, Huayou Hu, Tingting Zhang
Summary: A simple and effective method for copper-catalyzed selective C5-H bromination and difluoromethylation of 8-aminoquinoline amides using ethyl bromodifluoroacetate as the bifunctional reagent was developed. The combination of cupric catalyst and alkaline additive enables C5-bromination, while the combination of cuprous catalyst and silver additive enables C5-difluoromethylation. This method exhibits a wide substrate scope and provides easy access to desired C5-functionalized quinolones with high yields.
Article
Chemistry, Organic
Weiming Hu, Jiali Huang, Wenting Guo, Wenting Guo, Gang Gao, Xiaoqin Pei, Huiyan Wang, Chuanzhou Tao, Huayou Hu
Summary: A Pd-catalyzed carbonylative dearomatization of indoles using Co-2(CO)(8) as a safe CO source has been reported, providing an efficient method for the construction of carbonyl-containing spiroindolenines.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Hai-Ping Zhou, Shui-Xing Wu, Ying-Chen Duan, Feng-Wei Gao, Qing-Qing Pan, Yu-He Kan, Zhong-Min Su
Summary: This paper presents a series of radical luminescent materials based on TTM, designed through skeleton-engineering and periphery-engineering strategies. The study investigates the chemical stability and luminescence properties of these radicals using quantum chemistry methods. The findings reveal that radicals with smaller dihedral angle differences exhibit higher emission energy. Additionally, an efficient algorithm for calculating internal conversion rates is introduced and explained.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Lei Hu, Aiyong He, Xinming Shen, Qinyin Gu, Jingyi Zheng, Zhen Wu, Yetao Jiang, Xiaoyu Wang, Jiaxing Xu, Yuhe Kan, Feng Xu
Summary: A high-efficiency Zr-based single-atom catalyst Zr/NC was synthesized by direct pyrolysis, demonstrating remarkable catalytic activity and selectivity in the transfer hydrogenation of biomass-derived carbonyl compounds. The excellent performance of this catalyst can be attributed to the electron transfer and high Lewis acidity-basicity in the Zr-N-4 catalytic sites.
Article
Chemistry, Multidisciplinary
Hai-Ping Zhou, Shui-Xing Wu, Ying-Chen Duan, Feng-Wei Gao, Qing-Qing Pan, Yu-He Kan, Zhong-Min Su
Summary: This study investigates a series of monoradical molecules using quantum chemistry methods and finds that the luminescent properties of monoradical molecules can be tuned by introducing donor fragments. The electron donating abilities of donor fragments are negatively correlated with the stability and photoluminescence efficiency of the molecules. It is also discovered that the hybrid transition characteristic formed by charge transfer and localized excitation significantly contributes to the luminescence intensity of monoradical molecules.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Xue Bai, Shui-xing Wu, Ying-chen Duan, Qing-qing Pan, Feng-wei Gao, Yu-he Kan, Zhong-min Su
Summary: In this study, three new D-A-D molecules (PTZ-MPS, TPA-MPS, and PCz-MPS) were designed and investigated. It was found that PTZ-MPS has the feature of high-lying reverse intersystem crossing process, along with smaller singlet-triplet energy splitting and larger spin-orbital coupling strength.
NEW JOURNAL OF CHEMISTRY
(2022)
