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. 2024 Nov 8;29(22):5283. doi: 10.3390/molecules29225283

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© 2024 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 (https://creativecommons.org/licenses/by/4.0/).

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Scheme 4 — Synthetic routes for 1,1′-N,P-ferrocenes (A–D), where DABCO, BOP, and DBU stand for 1,4-diazabicyclo [2.2.2]octane, (benzotriazol-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate, and 1,8-diazabicyclo(5.4.0)undec-7-ene, respectively [113,114,119,122].