Access to substituted trifluoromethyl ketones using the versatile synthetic intermediate ( E )-1,1-dimethyl-2-(1,1,1-trifluoropropan-2-ylidene)hydrazine
作者:Ted C. Judd、Derek B. Brown
DOI:10.1016/j.tetlet.2017.10.022
日期:2017.11
ketones and aldehydes, as well as palladium-catalyzed cross-couplings with aryl bromides. Mild hydrolysis of the N,N-dimethylhydrazone products from these transformations affords the corresponding trifluoromethyl ketones in good to excellent yields.
1,1,1-三氟丙酮,(E)-1,1-二甲基-2-(1,1,1-三氟丙烷-2-亚丙基)肼的N,N-二甲基hydr已表现出不同的形变用正丁基锂去质子化后的反应 包括烷基化,酮和醛的加成以及钯与芳基溴化物的交叉偶联。来自这些转化的N,N-二甲基hydr产物的温和水解以良好至优异的产率提供了相应的三氟甲基酮。