Protonation pattern as controlling factor of thermal reactions of aryl o-divinylbenzenes in acidic media: an integrated experimental-theoretical study

Lovrinčević, Vilma; Znika, Monika; Le-Cunff, Jerome; Despotović, Ines; Vuk, Dragana (2025) Protonation pattern as controlling factor of thermal reactions of aryl o-divinylbenzenes in acidic media: an integrated experimental-theoretical study. Reaction Chemistry & Engineering, 10 (9). pp. 2080-2090. ISSN 2058-9883

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Abstract

The thermal transformations of various thienyl and phenyl derivatives of o-divinylbenzene in acidic media were investigated in an integrated experimental-theoretical study. Several derivatives (9–12) led to cyclization products when heated under acidic conditions, while some (13,14) were found to be non-reactive. The reactivity or non-reactivity of the investigated compounds is closely related to the position of the preferred protonation site in the investigated compounds, as shown by DFT calculations. If the preferred position of proton entry into the molecule coincides with the protonation position required for cyclization, the reaction proceeds, otherwise the derivatives are non-reactive. By blocking a preferred protonation position with a suitable substituent in the non-reactive precursors, protonation can be prevented at the undesired site and proton entry can be redirected to the site that allows the reaction to proceed. A detailed insight into the mechanism of the thermal reactions of 9–12 was presented.

Item Type:	Article
Uncontrolled Keywords:	aryl o-divinylbenzene; thermal reaction; acidic medium; reaction mechanism; DFT quantum chemical calculations; protonation orientation
Subjects:	NATURAL SCIENCES > Chemistry > Organic Chemistry
Divisions:	Division of Physical Chemistry
Depositing User:	Ines Despotović
Date Deposited:	06 Oct 2025 05:39
URI:	http://fulir.irb.hr/id/eprint/10037
DOI:	10.1039/d5re00052a

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