ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Valorization of water extract of banana peel ash: eco-friendly hydrophenoxylation and hydrothiolation of dialkyl acetylenedicarboxylates

Maura L. B. Peixoto, Giovani Zandoná, Marcos A. M. Silva, Shams Ali Baig, Calebe H. L. Silva, Marcia Victória Silveira, and Marcelo Godoi

School of Chemistry and Food, Federal University of Rio Grande - FURG, Rio Grande, Brazil

E-mail: marcelogodoi@furg.br

Received: 29 October 2025  Accepted: 11 April 2026

Abstract:

Banana peel ash has attracted great interest of the academic community since this agrowaste can be either transformed into value-added products or applied as an efficient promoter in chemical reactions. In particular, the use of Water Extract of Banana peel ash (WEB) in synthetic organic chemistry has provided great advances on environmental point of view. In this study, the composition of banana peel ash has been determined using Inductively Coupled Plasma Optical Emission Spectrometry and thermogravimetric analysis. Noteworthy, the banana peel ash was converted into corresponding water agrowaste extract and successfully applied as a green reaction media for the hydrophenoxylation and hydrothiolation of acetylenedicarboxylates. In general, the desired products were achieved in reasonable yields under environmentally friendly conditions. Indeed, acetylenedicarboxylates were treated with different phenols and thiols derivatives which afforded the corresponding products in 22–87% yields. Further mechanistic studies disclosed a radical reaction pathway.

Graphical abstract

Keywords: Green chemistry; Water extract of banana peel ash; Acetylenedicarboxylates

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-026-04909-z

Chemical Papers 80 (9) 9977–9985 (2026)