使用α-氧代羧酸作为酰基源,开发了一种简便,有效的N-取代吡唑啉酮的氧化CH-H酰化方法。Cu(OAc)2和K 2 S 2 O 8的组合可使反应在空气中顺利进行,并以中等到极好的收率提供各种各样的4-酰基吡唑啉酮产品。据信这种转变的机理是通过铜诱导的脱羧反应形成酰基铜物质而进行的。该方法为将酰基部分直接安装到生物活性吡唑啉酮衍生物中提供了方便且有用的途径,该途径可进一步用于许多应用中。
使用α-氧代羧酸作为酰基源,开发了一种简便,有效的N-取代吡唑啉酮的氧化CH-H酰化方法。Cu(OAc)2和K 2 S 2 O 8的组合可使反应在空气中顺利进行,并以中等到极好的收率提供各种各样的4-酰基吡唑啉酮产品。据信这种转变的机理是通过铜诱导的脱羧反应形成酰基铜物质而进行的。该方法为将酰基部分直接安装到生物活性吡唑啉酮衍生物中提供了方便且有用的途径,该途径可进一步用于许多应用中。
Ligating behaviour of Schiff base ligands derived from heterocyclic β-diketone and ethanol or propanol amine with oxovanadium (IV) metal ion
作者:B.T. Thaker、R.S. Barvalia
DOI:10.1016/j.saa.2009.08.041
日期:2009.12
aqueous ethanol medium. The ligands and their Schiffbaseligands have been characterized by elemental analyses, IR and (1)H NMR. The resulting complexes have been characterized by elemental analyses, IR, (1)H NMR, mass, electronic, electron spin resonance spectra, magnetic susceptibility measurement, molar conductance and thermal studies. The IR spectral data suggest that the ligand behaves as a dibasic
New Furopyridines Containing Pyridoxal and Pyrazolone Fragments
作者:L. K. Kibardina、A. V. Trifonov、A. R. Burilov、M. A. Pudovik
DOI:10.1134/s1070363218090098
日期:2018.9
Reactions of pyridoxal hydrochloride with 5-pyrazolone derivatives in alcohol medium in the presence of concentrated hydrochloric acid led to the formation of new pyrazolones with pyridoxal fragments in the molecule. The corresponding diarylmethanes were formed when using pyridoxal and pyrazolone in a 1: 2 ratio.
Microwave assisted synthesis and characterization of unsymmetrical tetradentate Schiff base complexes of VO(IV) and MoO(V)
作者:B.T. Thaker、R.S. Barvalia
DOI:10.1016/j.saa.2011.08.055
日期:2011.12
amount and reaction time. The attempt was made to synthesize the unsymmetrical tetradentate N(2)O(2) ligands and their VO(IV) and MoO(V) unsymmetrical tetradentate Schiff base complexes by classical and microwave techniques using domestic microwave oven. The resulting unsymmetrical Schiff base ligands L(1)-L(3) characterized by different spectral methods. Their complexes with oxocations of VO(IV) and MoO(V)