<i>N</i>-Difluoromethylation of Imidazoles and Benzimidazoles Using the Ruppert–Prakash Reagent under Neutral Conditions
作者:G. K. Surya Prakash、Sankarganesh Krishnamoorthy、Somesh K. Ganesh、Aditya Kulkarni、Ralf Haiges、George A. Olah
DOI:10.1021/ol403007j
日期:2014.1.3
using TMS-CF3 (the Ruppert–Prakash reagent) underneutralconditions. Difluoromethylated products were obtained in good-to-excellent yields. Inexpensive, commercially available starting materials, neutralconditions, and shorter reaction times are advantages of this methodology. Reactions are accessible through conventional as well as microwave irradiation conditions.
N-Difluoromethylation of monosubstituted polydentate azoles
作者:Kirill I. Petko、Taras M. Sokolenko、Andrey A. Filatov、Vitaliy V. Polovinko、Eduard B. Rusanov、Vadim A. Dudko、Yurii L. Yagupolskii
DOI:10.1007/s10593-019-02465-x
日期:2019.5
This study was focused on N-difluoromethylation of monosubstituted polydentate azoles (imidazoles, pyrazoles, and 1,2,4-triazoles) having two or three reactive sites. The substituent effects and role of reaction conditions in determining the product ratio was explored. In the majority of cases, the obtained mixtures of isomers were separated. The target products containing halogen substituents, amino