Research on new synthetic routes about 1228185-09-8

Here is just a brief introduction to this compound(1228185-09-8)SDS of cas: 1228185-09-8, more information about the compound(2-Chloro-1,3-bis(2,6-diisopropylphenyl)-1H-imidazol-3-ium chloride) is in the article, you can click the link below.

SDS of cas: 1228185-09-8. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 2-Chloro-1,3-bis(2,6-diisopropylphenyl)-1H-imidazol-3-ium chloride, is researched, Molecular C27H36Cl2N2, CAS is 1228185-09-8, about Concerted nucleophilic aromatic substitution with 19F- and 18F-. Author is Neumann, Constanze N.; Hooker, Jacob M.; Ritter, Tobias.

Nucleophilic aromatic substitution (SNAr) is widely used by organic chemists to functionalize aromatic mols., and it is the most commonly used method to generate arenes that contain 18F for use in positron-emission tomog. (PET) imaging. A wide range of nucleophiles exhibit SNAr reactivity, and the operational simplicity of the reaction means that the transformation can be conducted reliably and on large scales. During SNAr, attack of a nucleophile at a carbon atom bearing a ‘leaving group’ leads to a neg. charged intermediate called a Meisenheimer complex. Only arenes with electron-withdrawing substituents can sufficiently stabilize the resulting build-up of neg. charge during Meisenheimer complex formation, limiting the scope of SNAr reactions: the most common SNAr substrates contain strong π-acceptors in the ortho and/or para position(s). Here we present an unusual concerted nucleophilic aromatic substitution reaction (CSNAr) that is not limited to electron-poor arenes, because it does not proceed via a Meisenheimer intermediate. We show a phenol deoxyfluorination reaction for which CSNAr is favored over a stepwise displacement. Mechanistic insights enabled us to develop a functional-group-tolerant 18F-deoxyfluorination reaction of phenols, which can be used to synthesize 18F-PET probes. Selective 18F introduction, without the need for the common, but cumbersome, azeotropic drying of 18F, can now be accomplished from phenols as starting materials, and provides access to 18F-labeled compounds not accessible through conventional chem.

Here is just a brief introduction to this compound(1228185-09-8)SDS of cas: 1228185-09-8, more information about the compound(2-Chloro-1,3-bis(2,6-diisopropylphenyl)-1H-imidazol-3-ium chloride) is in the article, you can click the link below.

Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics