New Paper – Facile synthesis of poly-substituted aminopyrimidines

Cyclizations and fragmentations in the alkylation of 6-chloro-5-hydroxy-4-aminopyrimidines with aminoalkyl chlorides

J. Heterocyclic Chem., 2021, 58, 947-951

https://onlinelibrary.wiley.com/doi/10.1002/jhet.4228

https://doi.org/10.1002/jhet.4228

Edwige M. H. Picazo, Amy B. Heptinstall, David M. Wilson, Céline Cano, Bernard T. Golding, Michael J. Waring*

Substituted aminopyrimidines are an important class of compounds, in part because they frequently show biological activity. Facile synthesis of polysubstituted aminopyrimidines is highly desirable for the synthesis of screening libraries. We describe a route to 4,6-diamino-5-alkoxypyrimidines via a S_NAr-alkylation-S_NAr sequence from readily available 4,6-dichloro-5-methoxypyrimidine, which allows the synthesis of such compounds with regiochemical control. The extension of this approach to alkylating agents bearing amino substituents led to unexpected and, in some cases, unprecedented products resulting from intramolecular S_NAr cyclisation and subsequent fragmentation.

Last modified: Mon, 19 Dec 2022 17:25:58 GMT