Amines are highly valued molecules, used to understand biological processes and in the discovery of new medicines. However, medium-sized cyclic and macrocyclic amines are extremely challenging to synthesize and are therefore underutilized. Now, up to 15-membered cyclic amines can be formed directly from smaller, more accessible rings via an organoborane-catalysed two-carbon-unit C–C bond insertion.
This is a preview of subscription content, access via your institution
Access options
Access Nature and 54 other Nature Portfolio journals
Get Nature+, our best-value online-access subscription
$32.99 / 30 days
cancel any time
Subscribe to this journal
Receive 12 print issues and online access
$259.00 per year
only $21.58 per issue
Rent or buy this article
Prices vary by article type
from$1.95
to$39.95
Prices may be subject to local taxes which are calculated during checkout

References
Marshall, C. M. et al. J. Med. Chem. 67, 11622–11655 (2024).
Jimenez, D. G. et al. J. Med. Chem. 66, 5377–5396 (2023).
Gradillas, A. & Pérez-Castells, J. Angew. Chem. Int. Edn 45, 6086–6101 (2006).
Mortensen, K. T. et al. Chem. Rev. 119, 10288–10317 (2019).
Donald, J. R. & Unsworth, W. P. Chem. Eur. J. 23, 8780–8799 (2017).
Zhou, X.-Y., Liu, L., Lyu, H. & Wang, X.-C. Nat. Chem. https://doi.org/10.1038/s41557-025-01849-1 (2025).
Basak, S. et al. Chem. Soc. Rev. 50, 3720–3737 (2021).
Gillions, J. P. et al. Synlett 34, 2117–2128 (2023).
Dai, C. et al. Asian J. Org. Chem. 12, e202300198 (2023).
Jones, B. T. & Maulide, N. Angew. Chem. Int. Edn 63, e202320001 (2024).
Zhou, X.-Y. et al. ACS Catal. 14, 8041–8049 (2024).
Zhang, M. et al. Angew. Chem. Int. Edn 63, e202317610 (2024).
Alvarez-Montoya, A. et al. ACS Catal. 14, 4856–4864 (2024).
Efimov, I. V. et al. Eur. J. Org. Chem. 26, e202201450 (2023).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Competing interests
The authors declare no competing interests.
Rights and permissions
About this article
Cite this article
Barysevich, M., Pulis, A.P. Ring expansion and chain extension of alkyl amines. Nat. Chem. 17, 1299–1300 (2025). https://doi.org/10.1038/s41557-025-01920-x
Published:
Version of record:
Issue date:
DOI: https://doi.org/10.1038/s41557-025-01920-x