Highly Active Cyclic Zinc(II) Thione Catalyst for C−C and C−N Bond Formation Reactions

Mannarsamy, Maruthupandi and Nandeshwar, Muneshwar and Muduli, Gopendra and Prabusankar, G (2022) Highly Active Cyclic Zinc(II) Thione Catalyst for C−C and C−N Bond Formation Reactions. Chemistry – An Asian Journal. ISSN 1861-4728

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The first discrete seven-membered cyclic zinc(II) complex catalyzed room temperature Knoevenagel condensation reactions, and the synthesis of perimidine derivatives has been reported under mild reaction conditions. The cyclic zinc(II) complex [(L)ZnBr2] (1) was isolated from the reaction between 1-(2-hydroxyethyl)-3-isopropyl-benzimidazol-2-thione (L) and ZnBr2. Complex 1 was characterized by different analytic techniques such as FT-IR, CHNS, TGA, NMR, and SCXRD. The mononuclear zinc(II) complex 1 was utilized as a catalyst for Knoevenagel condensation reactions to isolate twenty different substituted methylene malononitriles with excellent yield. Besides, the zinc(II) thione complex 1 was utilized for the synthesis of 2,4-dihydroperimidine derivatives in a highly efficient manner. Catalyst 1 depicted wide substrate scopes. Overall, twenty different substituted methylene malononitriles and nine different perimidine derivatives were synthesized using catalyst 1 at room temperature. The present investigation features a mild and fast synthetic approach along with excellent functional group tolerance.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Article
Additional Information: We gratefully acknowledge the DST-SERB (EMR/2017/001211) for financial support. MM thank CSIR-SRF (No: 09/1001(0025)/2016-EMR-I) for the Ph.D. fellowship. MN thank CSIR-SRF for the Ph.D. fellowship
Uncontrolled Keywords: 23-dihydroperimidine,knoevenagel condensation,zinc complex,zinc(II) thione
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: . LibTrainee 2021
Date Deposited: 22 Aug 2022 09:38
Last Modified: 22 Aug 2022 09:38
URI: http://raiith.iith.ac.in/id/eprint/10249
Publisher URL: http://doi.org/10.1002/asia.202200594
OA policy: https://v2.sherpa.ac.uk/id/publication/1526
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