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. 2020 Nov 17;25(22):5373. doi: 10.3390/molecules25225373

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Scheme 15 — From perylene and diarylbutadiynes to π-extended PAHs via tandem DA cycloaddition–cycloisomerization [152,165,166]. Reagents and conditions: (a) 10 eq. of diyne, 280 °C, 72 h, <0.01 Pa, Y = 10% (48) and 8% (49).