Heterocyclization of gem -dichlorocyclopropanes: 'Fine tuning' of reactivity towards nitronium triflate

Autor: Elena B. Averina, Victor B. Rybakov, Kseniya N. Sedenkova, Vladimir I. Minkin, Tamara S. Kuznetsova, Dmitry A. Vasilenko, D. V. Steglenko, Yuri K. Grishin, Nikolay S. Zefirov, Julia V. Kolodyazhnaya
Rok vydání: 2017
Předmět:
Zdroj: Tetrahedron Letters. 58:2955-2958
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2017.06.047
Popis: The heterocyclization of gem-dichlorocyclopropanes upon treatment with nitronium triflate in organic nitriles was studied and the influence of the medium on the reaction pathway was shown. While in anhydrous solvent 5-chloroisoxazole was the only product, the admixture with water promoted a three-component heterocyclization affording 4-chloropyrimidine N-oxides. This phenomenon was rationalized using DFT calculations.
Databáze: OpenAIRE