Reactions of 2,3-Dibromo-2-methylpropanamides Promoted by Potassium tert-Butoxide
作者:A. M. Galeeva、Z. R. Valiullina、N. K. Selezneva、M. S. Miftakhov
DOI:10.1134/s1070428021100122
日期:2021.10
Abstract 2,3-Dibromo-2-methylpropanamides with different substituents on the nitrogen atom were synthesized, and their transformations by the action of potassium tert-butoxide in THF were studied. 2,3-Dibromo-N-(4-methoxyphenyl)-2-methylpropanamide and 2,3-dibromo-N-(2,5-dibromo-4-methoxyphenyl)-2-methylpropanamide reacted with 1–2 equiv of t-BuOK to give the corresponding N-substituted 3-bromo-3-methyl-
摘要 合成了氮原子上具有不同取代基的2,3-二溴-2-甲基丙酰胺,并研究了它们在四氢呋喃中叔丁醇钾作用下的转化。2,3-二溴ñ - (4-甲氧基苯基)-2-甲基丙酰胺和2,3 -二溴- ñ - (2,5-二溴-4-甲氧基苯基)-2-甲基丙酰胺用1-2当量的反应吨- BuOK 以可接受的产率和选择性得到相应的 N-取代的 3-bromo-3-methyl- 和 3-methylideneazetidin-2-one。将t- BuOK的量增加到 3-5 当量导致乙烯基溴和 3-methylideneazetidin-2-one 的产率显着降低。另一方面,2,3-二溴-N- (叔丁基)-2-甲基丙酰胺与t - BuOK以良好的产率和选择性得到 3-(叔丁氧基甲基)-1-叔丁基氮杂环丁烷-2-酮。