N-Tosylhydrazine-mediated deoxygenative hydrogenation of aldehydes and ketones catalyzed by Pd/C
摘要:
A mild and efficient method for the deoxygenative hydrogenation of aldehydes and ketones has been developed. The reaction is mediated by N-tosylhydrazine with H-2 (1 atm) as the reductant and 10% Pd/C as the catalyst. (C) 2013 Elsevier Ltd. All rights reserved.
C(sp)–C(sp<sup>3</sup>) Bond Formation through Cu-Catalyzed Cross-Coupling of<i>N</i>-Tosylhydrazones and Trialkylsilylethynes
作者:Fei Ye、Xiaoshen Ma、Qing Xiao、Huan Li、Yan Zhang、Jianbo Wang
DOI:10.1021/ja3004792
日期:2012.4.4
Copper-catalyzed cross-coupling of N-tosylhydrazones with trialkylsilylethynes leads to the formation of C(sp)-C(sp(3)) bonds. Cu carbene migratory insertion is proposed to play the key role in this transformation.
Wittig Ylide Mediated Decomposition of <i>N</i>-Sulfonylhydrazones to Sulfinates
作者:Deepika Choudhary、Vineeta Khatri、Ashok K. Basak
DOI:10.1021/acs.orglett.7b03953
日期:2018.4.6
N-Sulfonylhydrazones generate sulfinates selectively when treated with a stabilized Wittig ylide in a polar aprotic solvent at elevated temperature. The transition metal and base free decomposition method is applicable to N-sulfonylhydrazones generated from a number of aromatic and heteroaromatic aldehydes and ketones. In the case of N-tosylhydrazones derived from O-allyl and O-propargyl salicylaldehydes
Pd-Catalyzed Three-Component Coupling of <i>N</i>-Tosylhydrazone, Terminal Alkyne, and Aryl Halide
作者:Lei Zhou、Fei Ye、Yan Zhang、Jianbo Wang
DOI:10.1021/ja105762n
日期:2010.10.6
A Pd-catalyzed three-component reaction of N-tosylhydrazone, terminalalkyne, and aryl halide follows a mechanism involving a sequence of Pd carbene migratory insertion-transmetalation-reductive elimination, leading to the formation of one sp(2)-sp(3) C-C bond and one sp-sp(3) C-C bond.
Pd 催化的 N-甲苯磺酰腙、末端炔烃和芳基卤化物的三组分反应遵循涉及 Pd 卡宾迁移插入-金属转移-还原消除序列的机制,导致形成一个 sp(2)-sp(3) ) CC 键和一个 sp-sp(3) CC 键。
Divergent Synthesis of Vinyl‐, Benzyl‐, and Borylsilanes: Aryl to Alkyl 1,5‐Palladium Migration/Coupling Sequences
Organosilicon compounds have been extensively utilized both in industry and academia. Studies on the syntheses of diverse organosilanes is highly appealing. Through‐space metal/hydrogen shifts allow functionalization of C−H bonds at a remote site, which are otherwise difficult to achieve. However, until now, an aryl to alkyl 1,5‐palladium migration process seems to have not been presented. Reported
Synthesis and antimicrobial evaluation of hydrazones derived from 4-methylbenzenesulfonohydrazide in aqueous medium
作者:Sunita Ghiya、Yogesh C. Joshi
DOI:10.1007/s00044-016-1543-9
日期:2016.5
and aromatic carbonyl compounds in the presence of polystyrene sulfonic acid in aqueous medium. The synthesized compounds were characterized by IR, NMR and mass spectra. The compounds have been evaluated for antimycobacterial, antibacterial and antifungal activities.