Synthesis, characterization and HPLC behaviour of metal complexes of methyl pyruvate aroylhydrazones
作者:Alessandro Mangia、Pier Luigi Messori、Corrado Pelizzi、Giovanni Predieri
DOI:10.1016/s0020-1693(00)88951-3
日期:1983.1
The synthesis and characterization of some transition metal complexes of methyl pyruvate N-aroylhydrazones RC(O)NHNC(CH3)C(O)OCH3 (R = C6H5, C6H4OH) are reported. These ligands undergo deprotonation with Co, Ni, Cu and Zn acetates to formneutral, hexacoordinate metal complexes with metal to ligand ratios of 1:2, acting as terdentate through the two carbonyl oxygens and the azomethine nitrogen. The
报道了一些丙酮酸N-芳酰基hydrRC(O)NHNC(CH 3)C(O)OCH 3(R = C 6 H 5,C 6 H 4 OH)过渡金属配合物的合成和表征。这些配体用Co,Ni,Cu和Zn乙酸酯进行去质子化反应,形成中性六配位金属配合物,金属与配体的比例为1:2,通过两个羰基氧和偶氮甲碱氮起三聚体的作用。还报道了对这些配合物的HPLC行为的研究以及Co,Ni,Cu螯合物的分离结果。使用非极性固定相和乙腈-二氯甲烷混合物作为流动相可获得最佳结果。
Indium-Mediated Addition of γ-Substituted Allylic Halides to N-Aryl α-Imino Esters: Diastereoselective Production of β,β′-Disubstituted α-Amino Acid Derivatives with Two Contiguous Stereocenters
作者:Nayyar Ahmad Aslam、Vadla Rajkumar、Chennakesava Reddy、Makoto Yasuda、Akio Baba、Srinivasarao Arulananda Babu
DOI:10.1002/ejoc.201200254
日期:2012.8
γ-substituted allylic halides to N-aryl (including N-PMP) α-imino- and N-acylhydrazono esters and highly diastereoselective tailoring of functionalized γ,δ-unsaturated β,β′-disubstituted N-aryl α-amino acid derivatives, bearing two contiguous stereocenters is reported. Further N-allylation of the resulting γ,δ-unsaturated β,β′-disubstituted N-aryl amino acid derivatives followed by ringclosingmetathesis (RCM)