A ferric nitrate-promoted cross-dehydrogenative coupling reaction of N-hydroxyphthalimide (NHPI) with toluene derivatives is reported. The reaction proceeded smoothly using molecular oxygen as an oxidant, providing an efficient method for the synthesis of N-hydroxyimide esters. Furthermore, a plausible mechanism was proposed.
An efficient method to prepare amides by a cascade strategy was developed. Using nBu4NI or NaI as the catalyst and tert-butyl hydroperoxide as the oxidant, various alcohols reacted with N-hydroxysuccinimide or N-hydroxyphthalimide affording corresponding active esters in moderate to good yield. The resulting active esters were converted into amides smoothly in one pot.
开发了一种通过级联策略制备酰胺的有效方法。使用n Bu 4 NI或NaI作为催化剂,氢过氧化叔丁基作为氧化剂,各种醇与N-羟基琥珀酰亚胺或N-羟基邻苯二甲酰亚胺反应,以中等至良好的产率提供相应的活性酯。在一锅中将所得的活性酯平稳地转化为酰胺。
Visible Light‐Driven Efficient Synthesis of Amides from Alcohols using Cu−N−TiO
<sub>2</sub>
Heterogeneous Photocatalyst
作者:Krishnadipti Singha、Subhash Chandra Ghosh、Asit Baran Panda
DOI:10.1002/ejoc.202001466
日期:2021.1.26
practical method for direct amide synthesisfromalcohols and amines using an in situ generated active ester of N‐hydroxyimide with the earlier developed robust and recyclable Cu−N−TiO2 catalyst, at room temperature, using oxygen as a sole oxidant under visible light is discussed. The application of this amidation reaction has been successfully demonstrated for the synthesis of moclobemide, an antidepressant
Iron-Nitrate-Catalyzed Oxidative Esterification of Aldehydes and Alcohols with <i>N</i>
-Hydroxyphthalimide: Efficient Synthesis of <i>N</i>
-Hydroxyimide Esters
An Fe(NO3)3*9H2O-catalyzed cross-dehydrogenative coupling reaction between N-hydroxyphthalimide (NHPI) or N-hydroxysuccinimide (NHSI) and aldehydes or alcohols in the air has been described. This transformation provided an efficientapproach to prepare N-hydroxyimide ester derivatives with wide substrate scope in moderate to excellent yields.
A photoinduced cross-dehydrogenative-coupling (CDC) reaction between aldehydes and <i>N</i>-hydroxyimides by a TiO<sub>2</sub>–Co ascorbic acid nanohybrid under visible light irradiation
In this study, we performed a visible light-mediated aerobic photo-cross dehydrogenative coupling (CDC) reaction between aldehydes and N-hydroxyimides using TiO2–AA–Co as a photocatalyst for the synthesis of active esters. The synergistic and selective effects of the cobalt ascorbic acid complex (Co–AA) and TiO2 nanoparticles on the visible-light photocatalytic activity were explored. The method possesses