Journal
CHEMICAL SOCIETY REVIEWS
Volume 50, Issue 6, Pages 3720-3737Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cs00531b
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Funding
- School of Chemistry, University of Leicester
- Royal Society [RGS\R1\191082]
- School of Chemistry, Cardiff University
- Leverhulme Trust [RPG-2015-361]
- Schlumberger Foundation
- EPSRC [EP/R026912/1]
- EPSRC [EP/R026912/1] Funding Source: UKRI
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Boranes have the ability to mediate hydride abstraction from amino C-H bonds, resulting in the generation of reactive iminium hydridoborate salts that can participate in various stoichiometric and catalytic processes. These reactions include manipulation of amino scaffolds and the use of amine-based reagents for reactions such as transfer hydrogenation and alkylation.
The manipulation of amino C-H bonds has garnered significant interest from the synthetic community due to its inherently high atom, step and redox economy. This Tutorial Review summarises the ability of boranes to mediate hydride abstraction from alpha-amino and gamma-amino conjugated C-H bonds. Borane-mediated hydride abstraction results in the generation of reactive iminium hydridoborate salts that participate in a variety of stoichiometric and catalytic processes. The reactions that have utilised this unusual reactivity include those that manipulate amino scaffolds (including dehydrogenation, racemisation, isomerisation, alpha- and beta-functionalisation, and C-N bond cleavage) and those that use amine-based reagents (transfer hydrogenation, and alkylation).
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