reported here the low loading porphyrin-inspired high-valent manganese (IV)-oxo complex was applied in oxidative kineticresolution (OKR) of racemic heterocyclic sulfoxides using the environmentally benign hydrogen peroxide for the first time. This approach allows for rapid OKR (0.5 h) of a variety of racemic sulfoxides (including pyridine, pyrimidine, pyrazine, thiazole, benzothiazole, thiophene) in
The direct α‐heteroarylation of alkylamides through a radical chain mechanism involving homolytic aromatic substitution (HAS) was accomplished using methanesulfonylheteroarenes and t‐BuON=NOt‐Bu as arylating reagents and a tert‐butoxy radical precursor, respectively.
Hydroxyalkylated N-heteroaromatics are interesting scaffolds in a wide range of biologically active natural molecules. Herein, a photoredox-catalyzed hydroxyalkylation method for azole derivatives with aldehydes in the aqueous phase under an air atmosphere has been established. Furthermore, our catalytic system is also suitable for the alkylation of azole derivatives with alkanes. This methodology
Synthesis of 2-Sulfonylthiazoles via Heteroaryl C–H Sulfonylation of Thiazole N-Oxides
作者:Hyun-Suk Um、Woong Sik Shin、Kyu Jin Son、Chulbom Lee
DOI:10.1055/a-2059-3168
日期:——
Described here is an efficient method for the modular synthesis of 2-sulfonylthiazole derivatives via heteroaryl C–H sulfonylation. The protocol is composed of two stages involving O-activation of thiazole N-oxides and nucleophilic addition of a sulfinate, which induces N(3)-deoxygenation and C(2)-sulfonylation. The vicarious substitution is performed most effectively by using 4-methoxybenzoyl chloride
α-Aminoalkylation of sulfonylarenes with alkylamines was found to proceed successfully in the presence of a base in MeOH under photoirradiation, giving a wide variety of α-arylalkylamines. The reaction is initiated by photolysis of the S−Ar bond of sulfonylarenes leading to generation of α-aminoalkyl radicals, which get into a radical chain to give α-arylalkylamines.