Fungizide Pyridinderivate, 3. Mitt.: Unerwarteter Verlauf nukleophiler Substitutionen an einem Pyridinderivat
摘要:
In the course of substitution reactions for the synthesis of new types of fungicides, 3-(1-phenyl-1,2,2,2-tetrachloroethyl)-pyridine (2 c) showed an unexpected substitution behaviour: amino substituents were introduced into the pyridine ring and not into the side-chain.
Synthesis of 2-aroyl-(4 or 5)-aryl-1H-imidazoles and 2-hydroxy-3,6-diarylpyrazines via a cascade process
作者:Cong Liu、Rongji Dai、Guowei Yao、Yulin Deng
DOI:10.3998/ark.5550190.p008.270
日期:——
The synthesis of (4 or 5)-aryl-2-aroyl-1H-imidazoles and 2-hydroxy-3,6-diarylpyrazines from aryl methyl ketones via a cascadeprocess of DMSO-HBr oxidation and Debus reaction was investigated. Owing to the simple starting materials, mild conditions, easy operation, high bioactivity of imidazole and pyrazine derivatives, this protocol has great potential in medicinal chemistry.