Reductive coupling of aliphatic cyclic imides with benzophenones by low-valent titanium
作者:Naoki Kise、Syn Kinameri、Toshihiko Sakurai
DOI:10.1016/j.tetlet.2013.10.053
日期:2013.12
The reductivecoupling of aliphatic cyclic imides with benzophenones by Zn–TiCl4 in THF gave two- and four-electron reduced products selectively by controlling the reaction conditions. Although cyclic and acyclic products were formed as mixtures in most cases, cyclic dehydrated products could be selectively obtained by heating the product mixtures in the presence of cat. p-TsOH.
Vinylogous Blaise Reaction: Conceptually New Synthesis of
Pyridin-2-ones
作者:H. Rao、Nandurka Muthanna、Ashiq Padder
DOI:10.1055/s-0037-1610171
日期:2018.7
A conceptuallynewsynthesis of pyridine rings by a [C4 + CN] assembly has been developed by applying a vinylogous version of the classic Blaisereaction. The zinc-mediated reaction of (het)aryl or alkyl nitriles with ethyl-4-bromocrotonate provided a variety of C(6)-substituted pyridin-2-ones in a single-step.