Polyfunctional imidazoles: V. Synthesis of 1-aryl-4-chloro- 5-di(tri)fluoromethyl-1H-imidazoles
摘要:
1-Aryl-4-chloro-1H-imidazole-5-carbaldehydes and 1-aryl-4-chloro-1H-imidazole-5-carboxylic acids reacted with sulfur(IV) fluoride to give, respectively, 1-aryl-4-chloro-5-difluoromethyl- and 1-aryl-4-chloro-5-trifluoromethyl-1H-imidazoles.
Polyfunctional imidazoles: X. Synthesis of 4-chloro-5-(2-nitroalkenyl)-1H-imidazoles and their reaction with 5-methyl-2,4-dihydro-3H-pyrazol-3-one
作者:V. A. Chornous、A. N. Grozav、O. Ya. Mel’nik、V. V. Pirozhenko、M. V. Vovk
DOI:10.1134/s1070428015040132
日期:2015.4
Condensation of 1-aryl-4-chloro-1H-imidazole-5-carbaldehydes with nitroalkanes in the presence of anhydrous ammonium acetate gave 4-chloro-5-(2-nitroalkenyl)-1H-imidazoles which reacted with 5-methyl-2,4-dihydro-3H-pyrazol-3-one according to the Michael addition scheme with formation of 4-[1-(4-chloro-1H-imidazol-5-yl)-2-nitroalkyl]-5-methyl-1H-pyrazol-3-ols.