Coordination compounds of hydrazine derivatives with transition metals. X. Cobalt(II) aroylhydrazone complexes
作者:M.F. Iskander、L. El Sayed、M.A. Lasheen
DOI:10.1016/s0020-1693(00)91704-3
日期:1976.1
Abstract The reactions of some aroylhydrazones (HL) with cobalt(II) salts were investigated and chelates of the types [Co(HL) 2 X 2 ] and [Co(L) 2 ] were isolated. Analytical data, infrared studies, magnetic moments and solution spectra as well as some conductivity measurements were used to characterise these chelates. The [Co(HL) 2 X 2 ] chelates were found to possess octahedral configuration in solid
摘要研究了某些芳香酰hydr(HL)与钴(II)盐的反应,并分离了[Co(HL)2 X 2]和[Co(L)2]类型的螯合物。使用分析数据,红外研究,磁矩和溶液光谱以及一些电导率测量来表征这些螯合物。发现[Co(HL)2 X 2]螯合物在固态下具有八面体构型,但在DMF溶液中解离。试图鉴定解离产物。暂时为中性[Co(L)2]螯合物指定了一个二聚体五坐标结构。
Coordination compounds of hydrazine derivatives with transition metals. XIV. Nickel(II) chelates with bidentate aroylhydrazones and their reactions with heterocyclic bases
作者:M.F. Iskander、S. Saddeck
DOI:10.1016/s0020-1693(00)90911-3
日期:1977.1
neutral bis(ligand)nickel(II) chelates derived from some bidentate aroylhydrazones have been prepared and characterized. Whatever the solubility permits, the reaction of the neutral bis-(ligand)chelates, NiL 2 , with some heterocyclicbases were studied spectrophotometrically in benzene solution. The stability constants as well as the thermodynamic parameters (ΔG, ΔH, ΔS) for the adduct formation reaction
Efficient [(NHC)Au(NTf<sub>2</sub>)]-catalyzed hydrohydrazidation of terminal and internal alkynes
作者:Maximillian Heidrich、Herbert Plenio
DOI:10.3762/bjoc.16.175
日期:——
The efficient hydrohydrazidation of terminal (6a–r, 18 examples, 0.1–0.2 mol % [(NHC)Au(NTf2)], T = 60 °C) and internal alkynes (7a–j, 10 examples, 0.2–0.5 mol % [(NHC)Au(NTf2)], T = 60–80 °C) utilizing a complex with a sterically demanding bispentiptycenyl-substituted NHC ligand and the benign reaction solvent anisole, is reported.
A New Silicon Lewis Acid for Highly Enantioselective Mannich Reactions of Aliphatic Ketone-Derived Hydrazones
作者:Gregory T. Notte、James L. Leighton
DOI:10.1021/ja800830h
日期:2008.5.1
The first general method for the highly enantioselective Mannich reaction of aliphatic ketimines is reported. A new, second generation chiral silane Lewisacid has been developed that promotes the reaction between ketone-derived hydrazones and silyl ketene acetals, providing the beta,beta-disubstituted beta-amino esters with good enantioselectivity even for the hydrazone derived from 2-butanone (methyl
Copper catalysed cross-dehydrogenative coupling (CDC) reaction of 4-thiazolidinone with terminal alkyne
作者:Mohammedumar M. Shaikh、Anuj P. Patel、Kishor H. Chikhalia
DOI:10.1016/j.tet.2018.10.068
日期:2019.1
Cross dehydrogenative coupling (CDC) strategy has been employed for C-alkynylation of 4-thiazolidinone with terminal alkyne under copper catalysis. Present reaction involves coupling of C(sp3) adjacent to sulfur of 4-thiazolidinone with C(sp) of terminal alkyne under CDC strategy is unprecedented to the best of our knowledge. Significant functional group tolerance, considerable yield and DFT study