| Home > Articles > Published articles > Iridium-catalyzed isomerization of N-sulfonyl aziridines to allyl amines |
| Date: | 2018 |
| Abstract: | The Crabtree's reagent catalyzes the isomerization of N-sulfonyl 2,2-disubstituted aziridines to allyl amines. The selectivity of allyl amine vs imine is very high (up to 99/1). The unprecedented isomerization takes place in mild conditions without activation of the catalyst by hydrogen. The mechanism has been studied computationally by DFT calculations; instead of the usual hydrogenation of COD, the catalytic species is formed by a loss of the pyridine ligand. Approaching of aziridine to this unsaturated species leads to a carbocation intermediate through a low energy barrier. A metal-mediated tautomerization involving sequentially γ-H elimination and N-H reductive elimination affords selectively the allyl amine. The readiness of the CγH bond to participate in the H elimination step accounts for the selectivity toward the allyl amine product. |
| Grants: | Agencia Estatal de Investigación CTQ2017-87840-P Agencia Estatal de Investigación CTQ2017-87889-P |
| Rights: | Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets. |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió acceptada per publicar |
| Subject: | Allyl group ; Amines ; Aziridines ; Catalysts ; Isomerization |
| Published in: | Organic Letters, Vol. 20, issue 18 (Sep. 2018) , p. 5747-5751, ISSN 1523-7052 |
Postprint 6 p, 433.9 KB |