Smyshliaeva LA, Varaksin MV, Slepukhin PA, Chupakhin ON, Charushin VN. Transition metal-free oxidative and deoxygenative C-H/C-Li cross-couplings of 2
H-imidazole 1-oxides with carboranyl lithium as an efficient synthetic approach to azaheterocyclic carboranes.
Beilstein J Org Chem 2018;
14:2618-2626. [PMID:
30410624 PMCID:
PMC6204773 DOI:
10.3762/bjoc.14.240]
[Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 09/21/2018] [Indexed: 12/20/2022] Open
Abstract
The direct C-H functionalization methodology has first been applied to perform transition metal-free C-H/C-Li cross-couplings of 2H-imidazole 1-oxides with carboranyllithium. This atom- and step-economical approach, based on one-pot reactions of nucleophilic substitution of hydrogen (SN H) in non-aromatic azaheterocycles, affords novel imidazolyl-modified carboranes of two types (N-oxides and their deoxygenative analogues), which are particularly of interest in the design of advanced materials.
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