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- Title
Facile Syntheses of N-Heterocyclic Carbene Precursors through I<sub>2</sub>- or NIS-Promoted Amidiniumation of N-Alkenyl Formamidines.
- Authors
Li, Jing; Jiao, Jiajun; Zhang, Caiyun; Shi, Min; Zhang, Jun
- Abstract
We have developed I2- or N-iodosuccinimide (NIS)-mediated amidiniumation of N-alkenyl formamidines for the syntheses of cyclic formamidinium salts, some of which could be directly used as N-heterocyclic carbene (NHC) precursors. Treatment of iodine-containing formamidinium salts with Al2O3 led to the formation of cyclic formamidinium salts with an unsaturated backbone. A rhodium(I) complex ligated by a representative NHC was prepared by the reaction of [Rh(cod)Cl]2 (cod=1,5-cyclooctadiene) with the free carbene obtained in situ from deprotonation of the corresponding formamidinium salts. The NHCs prepared in situ can also react with S8 to afford the corresponding thiones.
- Subjects
HETEROCYCLIC chemistry; CARBENES; ALKENYL group; FORMAMIDINES; CYCLOOCTADIENE
- Publication
Chemistry - An Asian Journal, 2016, Vol 11, Issue 9, p1361
- ISSN
1861-4728
- Publication type
Article
- DOI
10.1002/asia.201600182