Samani ZR, Mehranpour A. An efficient route to the synthesis of novel zwitterionic pyridinium-cyanopropenides with 3-heteroaryl-substituted trimethinium salts.
RSC Adv 2022;
12:16229-16234. [PMID:
35733684 PMCID:
PMC9150544 DOI:
10.1039/d2ra02465a]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 05/24/2022] [Indexed: 11/21/2022] Open
Abstract
In this study, eight new zwitterionic derivatives were synthesized using a simple design method from the reaction of various 2-substituted 1,3-bis(dimethylamino)-trimethinium salts with malononitrile or ethyl 2-cyanoacetate in excellent yields in the presence of triethylamine in ethanol at reflux. The molecular structures of the new compounds were confirmed by IR, UV/vis, mass, 1H, and 13C NMR spectra as well as by elemental analyses.
Synthesis of new zwitterionic derivatives via the reaction of 2-substituted 1,3-bis(dimethylamino)-trimethinium salts with malononitrile or ethyl cyanoacetate in the presence of Et3N in ethanol at reflux.![]()
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