Copper catalysed alkylation of heteroaryl chloride via migratory insertion of carbenes
作者:Sulochana S. Mudaliar、Shailesh N. Zala、Kishor H. Chikhalia
DOI:10.1016/j.jorganchem.2017.07.006
日期:2017.10
Cross-coupling reaction involving Cu catalysed carbenemigratoryinsertion with N-tosylhydrazones as the reaction partner with various substituted cyanuric chloride were studied, which has been recognized as a new type of cross-coupling reaction. Cu-carbene migratoryinsertion is proposed to play the key role in this transformation to form C-C bond from heterohalides with various tosylhydrazones. Salient
A novel Au-catalyzed domino reaction for the synthesis of imidazo[1,2-a]pyridines from 2-aminopyridine and N-tosylhydrazones has been developed using molecular oxygen. It represents a new strategy for the formation of CN bonds. This transformation demonstrated a broad tolerance toward the substrates and allowed the generation of a diverse imidazo[1,2-a]pyridine derivatives with good yields.
利用分子氧开发了一种新的金催化的多米诺骨牌反应,该反应由2-氨基吡啶和N-甲苯磺酰hydr合成咪唑并[1,2- a ]吡啶。它代表了形成C N键的新策略。该转化显示出对底物的广泛耐受性,并允许以良好的产率产生多种咪唑并[1,2- a ]吡啶衍生物。
Pd-catalyzed cross-coupling reactions of less activated alkenyl electrophiles (for tosylates and mesylates) with tosylhydrazones: synthesis of various 1,3-dienes
作者:Poojan K. Patel、Jignesh P. Dalvadi、Kishor H. Chikhalia
DOI:10.1039/c4ra09012h
日期:——
Palladium catalyzed cross coupling reaction engaging N-tosylhydrazones of corresponding ketones as a nucleophilic coupling partner and various alkenyl tosylates and mesylates as an electrophiles for the synthesis of various alkenyl derivatives. The salient features of this reactions are (1) no stoichiometric organometallic reagents required, (2) it tolerates a wide range of functional groups, (3) easy
TBAI-Catalyzed Reaction between <i>N</i>-Tosylhydrazones and Sulfur: A Procedure toward 1,2,3-Thiadiazole
作者:Jiangfei Chen、Yan Jiang、Jin-Tao Yu、Jiang Cheng
DOI:10.1021/acs.joc.5b02280
日期:2016.1.4
A TBAI-catalyzed reaction between N-tosyl hydrazone and sulfur was developed, leading to 1,2,3-thiadiazoles in moderate to good yields. It represents a facile and practical procedure to access thiadiazole under metal-free conditions. This procedure serves as an improvement for the Hurd-Mori reaction.