70
Views
0
CrossRef citations to date
0
Altmetric
Research Articles

The Diels–Alder Reaction between Euparin and Dimethyl Acetylenedicarboxylate; a Joint Experimental and Density Functional Theory Study

, , , , &
Pages 2077-2089 | Received 20 Apr 2022, Accepted 02 May 2023, Published online: 21 May 2023
 

Abstract

In this project, we have investigated the Diels–Alder (DA) reaction between euparin (as a natural furan derivative) and dimethyl acetylenedicarboxylate (DMAD) as an electrophilic acetylene. The experimental observations during the reaction in different conditions showed that the yield and the rate of the process would increase with increasing the polarity of the solvent. Such observation suspected us that like several recent reports, the mechanism of this DA reaction takes place through a stepwise route containing a zwitterionic intermediate or at least through a relatively polar transition state (TS). Next, during the density functional theory (DFT) studies and the potential energy surface (PES) investigations, we have detected a stepwise reaction pathway in parallel with the one-step route. The results of this work are in agreement with the recent reports about the competition between the one-step and multisteps routes in the DA reactions.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.