Hydrazone as the Directing Group for Ir-Catalyzed Arene Diborylations and Sequential Functionalizations
作者:Abel Ros、Rocío López-Rodríguez、Beatriz Estepa、Eleuterio Álvarez、Rosario Fernández、José M. Lassaletta
DOI:10.1021/ja300308c
日期:2012.3.14
The use of hemilabile pyridine-hydrazone N,N-ligands allows the highlyselective Ir-catalyzed ortho,ortho'-directed diborylation of aromatic N,N-dimethylhydrazones in near-quantitative yields. One-pot sequential Suzuki-Miyaura cross-coupling with different arylbromides provides a short entry to unsymmetrically substituted 2,6-diarylbenzaldehyde derivatives.
使用 hemilabile 吡啶-腙 N,N-配体允许以接近定量的产率对芳香族 N,N-二甲基腙进行高度选择性的 Ir 催化的邻、邻'-定向二硼化。与不同芳基溴化物的一锅顺序 Suzuki-Miyaura 交叉偶联为不对称取代的 2,6-二芳基苯甲醛衍生物提供了一个捷径。
Pinacolborane as the Boron Source in Nitrogen-Directed Borylations of Aromatic <i>N</i>,<i>N</i>-Dimethylhydrazones
作者:Rocío López-Rodríguez、Abel Ros、Rosario Fernández、José M. Lassaletta
DOI:10.1021/jo301965v
日期:2012.11.2
A mild procedure for the Ir(III)-catalyzed nitrogen-directed ortho borylation of aromatic N,N-dialkylhydrazones using pinacolborane as the boron source has been developed. The methodology relies on a modified, hemilabile N,N ligand built on a 4-N,N-dimethylaminopyridine unit that provides high reactivity while maintaining exclusive ortho-selectivity. This procedure can be combined with Suzuki–Miyaura
Dimethylhydrazones of Aliphatic, Aromatic, and Heterocyclic Aldehydes and Their Infrared Absorption Characteristics
作者:RICHARD H. WILEY、STEPHEN C. SLAYMAKER、HAROLD KRAUS
DOI:10.1021/jo01353a031
日期:1957.2
Solvent-Free Conversion of N,N-Dimethylhydrazones to Nitriles Under Microwave Irradiation
作者:T. Ramalingam、B. V. Subba Reddy、R. Srinivas、J. S. Yadav
DOI:10.1080/00397910008087080
日期:2000.12.1
Abstract A variety of aldehyde N,N-dimethylhydrazones are rapidly converted into the corresponding nitriles using oxone supported on wet Al2O3 under microwave irradiation in dry media.