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.
Reductive coupling of aliphatic cyclic imides and ω-amidoesters with benzophenones by low-valent titanium: Synthesis of 5-diarylmethylene-1,5-dihydropyrrol-2-ones, 6-diarylmethyl-2-pyridones, and ω-(diarylmethylene)lactams
作者:Naoki Kise、Syn Kinameri、Toshihiko Sakurai
DOI:10.1016/j.tet.2019.05.013
日期:2019.6
The reductive coupling of cyclicimides and ω-amidoesters with benzophenones by Zn-TiCl4 in THF and subsequent acid-catalyzed dehydration gave 5-diarylmethylene-1,5-dihydropyrrol-2-ones A, 6-diarylmethyl-2-pyridones B, and ω-(diarylmethylene)lactams C. In a similar manner, 3-((benzyloxy)carbonyl)amino substituted A, B, and C were synthesized from the corresponding 3-((benzyloxy)carbonyl)amino cyclic