Effect of fluorine or oxygen atom(s) in propargylic position on the reactivity in click chemistry
摘要:
The use of especially designed omega-diynes allows to establish, through competitive reactions, the effect of C-F, C-OH, CF(2), C=0 and C(OMe)(2) substituents on the reactivity of neighbouring triple bonds in click chemistry and this gives not only a reactivity scale but also a direct access to the difference in activation energies between the competitive reaction pathways. (C) 2010 Elsevier Ltd. All rights reserved.
Synthesis of new difluoroalkyl propargylic ketones and their use for the preparation of fluorinated heterocycles
作者:Pierre Bannwarth、Danielle Grée、René Grée
DOI:10.1016/j.tetlet.2010.02.116
日期:2010.5
Synthetic methodology studies are reported towards the preparation of new propargylic ketones with CF2R side chains. These molecules are used for the synthesis of various types of five- or six-membered heterocycles with difluoroalkyl side chains.