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Abstract
The mechanism of addition of nucleophiles to the π-acid complexed alkynes has been studied
successfully by the assessment of energy of intermediates and activation parameters. To elucidate
the origin of stereoselectivity and predict the reaction pathways, the geometry optimizations of reactants,
products, intermediates and transition states, were calculated by using density functional theory
(DFT) at the B3LYP/6-31+G(d) method. The reaction mechanism of hydration of alkynes in the
catalyzed synthesis of bis-spiroketal by DFT calculations is explored. The pyranyl enol ether was
formed regioselectively by the first ring closure. Further, bis-enol ether was formed by second 6-exodig
addition. Then, dehydration, followed by dehydrative ring closure finally gave bis-spiroketal product.
It is concluded that one of the most feasible reaction pathways comprises pyranyl enol ether and
bis-enol ether formation as intermediates. The final cyclization step of product formation is endothermic.
In terms of stereochemistry, the trans-product is found to be energetically more stable than cisproduct
and hence supports the electivity of the reaction.
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Affiliation(s)
- Kamlesh Sharma
- Department of Chemistry, Faculty of Physical Sciences, Shree Guru Gobind Singh Tricentenary University, Gurugram 122505, Haryana, India
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Khan SA, Asiri AM, Zayed MEM, Parveen H, Aqlan FMS, Sharma K. Microwave‐assisted Synthesis, Characterization, and Density Functional Theory Study of Biologically Active Ferrocenyl Bis‐pyrazoline and Bis‐pyrimidine as Organometallic Macromolecules. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3381] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Salman A. Khan
- Chemistry Department, Faculty of ScienceKing Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia
| | - Abdullah M. Asiri
- Chemistry Department, Faculty of ScienceKing Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia
- Center of Excellence for Advanced Materials Research (CEAMR)King Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia
| | - Mohie E. M. Zayed
- Chemistry Department, Faculty of ScienceKing Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia
| | - Humaira Parveen
- Department of Chemistry, Faculty of ScienceUniversity of Tabuk Tabuk 71491 Saudi Arabia
| | - Faisal M. S. Aqlan
- Chemistry Department, Faculty of ScienceJeddah University Jeddah Saudi Arabia
| | - Kamlesh Sharma
- Department of Applied Science, School of Engineering and TechnologyThe NorthCap University Sector 23A Gurgaon 122017 Haryana India
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Ren YM, Yang RC. Efficient method for the synthesis of 3-arylbenzoquinoline, pyranoquinoline, and thiopyranoquinoline derivatives using PEG 1000-based dicationic acidic ionic liquid as recyclable catalyst via a one-pot multicomponent reaction. SYNTHETIC COMMUN 2016. [DOI: 10.1080/00397911.2016.1204460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Yi-Ming Ren
- Department of Biochemical Engineering, Anhui Polytechnic University, Wuhu, Anhui, China
| | - Ren-Chun Yang
- Department of Biochemical Engineering, Anhui Polytechnic University, Wuhu, Anhui, China
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Synthesis, Spectrofluorometric Studies, Micellization and non Linear Optical Properties of Blue Emitting Quinoline (AMQC) Dye. J Fluoresc 2016; 26:559-66. [DOI: 10.1007/s10895-015-1740-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 11/27/2015] [Indexed: 10/22/2022]
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