Preparation of Butadienylpyridines by Iridium-NHC-Catalyzed Alkyne Hydroalkenylation and Quinolizine Rearrangement.

ABSTRACT: Iridium(I) N-heterocyclic carbene complexes of formula Ir(κ² O,O'-BHetA)(IPr)(η² -coe) [BHetA=bis-heteroatomic acidato, acetylacetonate or acetate; IPr=1,3-bis(2,6-diisopropylphenyl)imidazolin-2-carbene; coe=cyclooctene] have been prepared by treating Ir(κ² O,O'-BHetA)(η² -coe)₂ complexes with IPr. These complexes react with 2-vinylpyridine to afford the hydrido-iridium(III)-alkenyl cyclometalated derivatives IrH(κ² O,O'-BHetA)(κ² N,C-C₇ H₆ N)(IPr) through the iridium(I) intermediate Ir(κ² O,O'-BHetA)(IPr)(η² -C₇ H₇ N). The cyclometalated IrH(κ² O,O'-acac)(κ² N,C-C₇ H₆ N)(IPr) complex efficiently catalyzes

SUBMITTER: Azpiroz R 

PROVIDER: S-EPMC8453560 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature