1073339-10-2Relevant academic research and scientific papers
Cobalt-Catalyzed C(sp2)-H borylation with an air-stable, readily prepared terpyridine cobalt(II) Bis(acetate) precatalyst
Léonard, Nadia G.,Bezdek, Máté J.,Chirik, Paul J.
, p. 142 - 150 (2017)
A bench-stable, 4-aryl-substituted terpyridine supported, high-spin cobalt(II) bis(acetate) complex, (ArTpy)Co- (OAc)2 (ArTpy = 4′-(4-N,N′-dimethylaminophenyl)-2,2′:6′,2″- Terpyridine), is active for the C(sp2)-H borylation of arenes and heteroarenes with B2Pin2 (Pin = pinacolato). Optimization of the catalytic borylation reaction revealed improved performance in the presence of LiOMe and turnover numbers of up to 100 have been observed using all air-stable components. EPR specstroscopy identified formation of inactive cobalt species, promoted by excess HBPin. A high-spin cobalt(II) bis[(diacetoxy)- pinacolatoborate-κ3O,O,O] compound has been isolated and characterized by X-ray diffraction and is the result of catalyst deactivation.
Electronic effects in iridium C-H borylations: Insights from unencumbered substrates and variation of boryl ligand substituents
Vanchura II, Britt A.,Preshlock, Sean M.,Roosen, Philipp C.,Kallepalli, Venkata A.,Staples, Richard J.,Maleczka Jr., Robert E.,Singleton, Daniel A.,Smith III, Milton R.
, p. 7724 - 7726 (2010)
Experiment and theory favour a model of C-H borylation where significant proton transfer character exists in the transition state. The Royal Society of Chemistry.
4-AMINO-6-(HETEROCYCLIC)PICOLINATES AND 6-AMINO-2-(HETEROCYCLIC)PYRIMIDINE-4-CARBOXYLATES AND THEIR USE AS HERBICIDES
-
Paragraph 0272; 0273, (2014/09/29)
Novel 4-amino-6-(heterocyclic)picolinic acids and their derivatives and 6-amino-2-(heterocyclic)pyrimidine-4-carboxylates and their derivatives are useful to control undesirable vegetation.
Rhodium-catalyzed intermolecular C-H silylation of arenes with high steric regiocontrol
Chen, Cheng,Hartwig, John F.
, p. 853 - 857 (2014/03/21)
Regioselective C-H functionalization of arenes has widespread applications in synthetic chemistry. The regioselectivity of these reactions is often controlled by directing groups or steric hindrance ortho to a potential reaction site. Here, we report a catalytic intermolecular C-H silylation of unactivated arenes that manifests very high regioselectivity through steric effects of substituents meta to a potential site of reactivity. The silyl moiety can be further functionalized under mild conditions but is also inert toward many common organic transformations, rendering the silylarene products useful building blocks. The remote steric effect that we observe results from the steric properties of both the rhodium catalyst and the silane.
