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the active metals sites.
12. Maydt D, De Spirt S, Muschelknautz C, Stahl W, Müller TJJ
(
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1
1
1
1
3. Albano G, Aronica LA, Biver T, Detti R, Pucci A (2018) Chem-
istrySelect 3:1749–1754
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Pigm 178:108368
2
+
In conclusion, the Pd /4A catalyst proved to be eꢃcient
in the reaction of acyl chlorides and terminal alkynes. The
desired ynones were formed in all cases, except with 2-iodo-
benzoyl chloride. However, in some cases a large amount of
a by-product was formed. A great advantage of the catalyst
is the easy preparation and recovery.
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Acknowledgements Open access funding provided by Budapest Uni-
versity of Technology and Economics (BME). The authors express
their gratitude to Prof. K. László for the BET surface determination.
The research reported in this paper has been supported by the National
Research, Development and Innovation Fund (TUDFO/51757/2019-
ITM, Thematic Excellence Program).
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2
2
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Conflict of interest The authors declare that they have no conꢁict of
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4:4274
interest.
2
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Open Access This article is licensed under a Creative Commons Attri-
bution 4.0 International License, which permits use, sharing, adapta-
tion, distribution and reproduction in any medium or format, as long
as you give appropriate credit to the original author(s) and the source,
provide a link to the Creative Commons licence, and indicate if changes
were made. The images or other third party material in this article are
included in the article’s Creative Commons licence, unless indicated
otherwise in a credit line to the material. If material is not included in
the article’s Creative Commons licence and your intended use is not
permitted by statutory regulation or exceeds the permitted use, you will
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