Synthesis of imides <i>via</i> palladium-catalyzed three-component coupling of aryl halides, isocyanides and carboxylic acids
作者:Bo Wang、Dan He、Beige Ren、Tuanli Yao
DOI:10.1039/c9cc08438j
日期:——
A palladium-catalyzed three-component synthesis of acyclic imides from feedstock arylhalides, carboxylic acids and isocyanides through the intermediacy of isoimides has been developed. The key to the success of this approach was controlled isocyanide slow addition and organic/aqueous biphasic conditions. This transition-metal-catalyzed approach features readily available starting materials, atom-
We report on cyclicimides as weak directing groups for selective monohydroxylation reactions using ruthenium catalysis. Whereas acyclic amides are known to promote the hydroxylation of the C(sp2)–H bond enabling five-membered ring ruthenacycle intermediates, the cyclicimides studied herein enabled the hydroxylation of the C(sp2)–H bond via larger six-membered ruthenacycle intermediates. Furthermore
Modular Synthesis of Carbazole-Substituted Phthalimides as Potential Photocatalysts
作者:Zsombor Gonda、Zoltán Novák、Tamás Földesi、Bálint Nagy
DOI:10.1055/a-1647-7292
日期:2022.9
The modular synthesis of carbazole functionalized phthalimides (PIs) and their applicability as catalyst in selected photocatalytic transformations are reported. The developed synthetic approach provides high variability of phthalimide considering that the synthesis of the phthalimide core can be easily performed. Starting from fluorophthalic acid anhydrides, the corresponding fluorophthalimides were
Ruthenium(II)‐Catalyzed CH Activation with Isocyanates: A Versatile Route to Phthalimides
作者:Suman De Sarkar、Lutz Ackermann
DOI:10.1002/chem.201404261
日期:2014.10.20
A cationic ruthenium(II)‐complex was utilized in the efficient synthesis of phthalimide derivatives by CHactivation with synthetically useful amides. The reaction proceeded through a mechanistically unique insertion of a cycloruthenated species into a CHet multiple bond of isocyanate. The novel method also proved applicable for the synthesis of heteroaromatic unsymmetric diamides as well as a potent
Unprecedented selective homogeneous cobalt-catalysed reductive alkoxylation of cyclic imides under mild conditions
作者:Jose R. Cabrero-Antonino、Rosa Adam、Veronica Papa、Mattes Holsten、Kathrin Junge、Matthias Beller
DOI:10.1039/c7sc01175j
日期:——
metal-catalysed reductive C2-alkoxylation of cyclicimides (phthalimides and succinimides) is presented. Crucial for the success is the use of [Co(BF4)2·6H2O/triphos (L1)] combination and no external additives are required. Using the optimal cobalt-system, the hydrogenation of the aromatic ring of the parent phthalimide is avoided and only one of the carbonyl groups is selectively functionalized. The
提出了第一个通用且有效的非贵金属催化的环状酰亚胺(邻苯二甲酰亚胺和琥珀酰亚胺)的还原性C2-烷氧基化反应。成功的关键是使用[Co(BF 4)2 ·6H 2 O / triphos(L1)]的组合,并且不需要外部添加剂。使用最佳的钴系统,避免了母体邻苯二甲酰亚胺的芳环的氢化,并且仅羰基中的一个被选择性地官能化。所得的产物,N-和芳基环取代的3-烷氧基-2,3-二氢-1H-异吲哚-1-酮和N-取代的3-烷氧基-吡咯烷基-2-酮衍生物是在温和的条件下以良好至优异的分离产率制备的。分子内还原偶联也可以在一步法中进行,从而得到三环化合物。本协议为药物和生物学关注的功能化N杂环化合物的直接合成开辟了新的贱金属工艺开发途径。