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Wang W, Xu X, Yang Z. Photoinduced charge transfer in one-photon and two-photon absorption of C2N: Effects of edge-modified with oxygenated groups. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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2
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Fu R, Lu Y, Yue G, Wu D, Xu L, Song H, Cao C, Yu X, Zong Y. Direct Synthesis of 3-Coumaranones with Calcium Carbide as an Acetylene Source. Org Lett 2021; 23:3141-3145. [PMID: 33819044 DOI: 10.1021/acs.orglett.1c00821] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A novel synthesis method for the construction of 3-coumaranones from the reaction of two molecules, calcium carbide and salicylaldehyde, was reported. Various 2-methyl-2-vinylbenzofuran-3(2H)-ones could be obtained in moderate yields in the absence of a metal catalyst. The salient features of this protocol involve widely available starting materials, an inexpensive and easy-to-handle alkyne source, and a cost-efficient route. The reaction mechanism was verified by density functional theory calculations of possible intermediates and corresponding transition states.
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Affiliation(s)
- Rugang Fu
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Yongzheng Lu
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Guoren Yue
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Dongqing Wu
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Li Xu
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Hai Song
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Cheng Cao
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Xinghai Yu
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Yingxiao Zong
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
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Ma J, Qiao W, Mu X, Dong J, Quan J, Tian C. Optical Properties of Artemisinin and Its Derivatives. ACS OMEGA 2020; 5:30849-30857. [PMID: 33324794 PMCID: PMC7726762 DOI: 10.1021/acsomega.0c03361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/30/2020] [Indexed: 06/12/2023]
Abstract
Artemisinin and its derivatives are of great research value in biology. In this work, we study their chiral and optical properties. The multidimensional multifunction analysis method is used to analyze the linear and nonlinear optical processes (one-photon and two-photon absorption: OPA and TPA), electronic circular dichroism (ECD), and Raman optical activity (ROA) mechanisms under light excitation. Transition dipole moments (TDMs) and charge difference density (CDD) are used to describe the electromagnetic interaction between ECD and ROA when a substance is excited by light. The theoretical research results of the study show that the dioxygen atoms provide an intermediary for the transfer between charges and also enhance the role of the TDMs. This generalized chiral theory can not only explain the traditional sources of chirality but also distinguish whether the molecule has chirality when the chiral center is not obvious. By analyzing ROA and different vibration modes, we can clearly observe that each part of the molecule responds differently when excited.
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Affiliation(s)
- Jialin Ma
- School
of Physics Science and Technology, Lingnan
Normal University, Zhanjiang 524048, P. R. China
- School
of Mathematics and Physics, University of
Science and Technology Beijing, Beijing 100083, P. R.
China
| | - Wenhua Qiao
- School
of Mathematics and Physics, University of
Science and Technology Beijing, Beijing 100083, P. R.
China
| | - Xijiao Mu
- School
of Mathematics and Physics, University of
Science and Technology Beijing, Beijing 100083, P. R.
China
| | - Jun Dong
- School
of Electronic Engineering, Xi’an
University of Posts and Telecommunications, Xi’an 710121, P. R. China
| | - Jun Quan
- School
of Physics Science and Technology, Lingnan
Normal University, Zhanjiang 524048, P. R. China
| | - Chunhua Tian
- School
of Physics Science and Technology, Lingnan
Normal University, Zhanjiang 524048, P. R. China
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