[EN] A VERSATILE LIGAND FOR PALLADIUM-CATALYZED META-C-H FUNCTIONALIZATIONS<br/>[FR] LIGAND POLYVALENT POUR DES FONCTIONNALISATIONS DE MÉTA-C-H CATALYSÉES PAR DU PALLADIUM
申请人:SCRIPPS RESEARCH INST
公开号:WO2017184589A1
公开(公告)日:2017-10-26
A class of mono-protected 3-amino-2- hydroxypyridine (MPAHP) ligands that enable the meta- C-H arylation of anilines, phenols, phenylacetic acids, and biologically relevant heterocyclic compounds using norbornene as a transient mediator is disclosed. The applicability of this meta-arylation methodology in the pharmaceutical industry is illustrated for heteroaryl substrates and heteroaryl iodide coupling partners, a feat made possible by using the MPAHP ligand. The enabling nature of MPAHP ligands to achieve other meta-C-H functionalization processes is also illustrated by the development of a meta-C-H amination reaction and a meta-C-H alkynylation reaction.
Versatile ligand for palladium-catalyzed meta-C—H functionalizations of aromatic substrates
申请人:The Scripps Research Institute
公开号:US10696635B2
公开(公告)日:2020-06-30
A class of mono-protected 3-amino-2-hydroxypyridine (MPAHP) ligands that enable the meta-C—H arylation of anilines, phenols, phenylacetic acids, and biologically relevant heterocyclic compounds using norbornene as a transient mediator is disclosed, such as in the formation of a reaction product of Formula IA:
The applicability of this meta-arylation methodology in the pharmaceutical industry is illustrated for heteroaryl substrates and heteroaryl iodide coupling partners, a feat made possible by using the MPAHP ligand. The enabling nature of MPAHP ligands to achieve other meta-C—H functionalization processes is also illustrated by the development of a meta-C—H amination reaction and a meta-C—H alkynylation reaction.
A VERSATILE LIGAND FOR PALLADIUM-CATALYZED META-C-H FUNCTIONALIZATIONS
申请人:The Scripps Research Institute
公开号:US20190119212A1
公开(公告)日:2019-04-25
A class of mono-protected 3-amino-2-hydroxypyridine (MPAHP) ligands that enable the meta-C—H arylation of anilines, phenols, phenylacetic acids, and biologically relevant heterocyclic compounds using norbornene as a transient mediator is disclosed. The applicability of this meta-arylation methodology in the pharmaceutical industry is illustrated for heteroaryl substrates and heteroaryl iodide coupling partners, a feat made possible by using the MPAHP ligand. The enabling nature of MPAHP ligands to achieve other meta-C—H functionalization processes is also illustrated by the development of a meta-C—H amination reaction and a meta-C—H alkynylation reaction.
Synthesis and conformational analysis of benzimidazole-based reverse turn mimics
New benzimidazole-based tetrapeptide mimics were synthesized and their conformational features were studied by NMR and molecular modeling techniques. All the analyses led to the conclusion that a β-turn is stabilized in both 2 and 3. Since values of the torsion angles do not allow an univocal definition of the β-turn type, structures 2 and 3 could be assigned to the generic type IV classification.