β-dicarbonyl compounds were electrochemically oxidized in a methanolic solution in the presence of sodium cyanide and sodium methoxide to yield the corresponding α-cyano-β-dicarbonyl compounds in moderate to good yields. Presumably, a two-electron transfer transforms the anion derived from the β-dicarbonyl compounds into a cation, which then reacts with a cyanide ion to afford the cyanation products.
Zirconium complexes with the trifunctional 3-cyanopentane-2,4-dionate ligand
作者:George A. Lock、David W. Thompson
DOI:10.1039/dt9800001265
日期:——
Five zirconiumcomplexes containing the 3-cyanopentane-2,4-dionate and 2-cyano-1-phenylbutane-1,3-dionate ligands (L) have been prepared: [ZrCl2(C6H6NO2)2], [ZrCl2(C11H8NO2)2], [ZrCl(C6H6NO2)3], [Zr(C6H6NO2)4], and [Zr(η-C5H5)(C6H6NO2)3]. Infrared data shows that all β-diketonate ligands are co-ordinated to the metal centre through both oxygens; however, in complexes of the type [ZrCl2L2] and [ZrCIL3]
已经制备了五个含有3-氰基戊烷-2,4-二酸酯和2-氰基-1-苯基丁烷-1,3-二酸酯配体(L)的锆配合物:[ZrCl 2(C 6 H 6 NO 2)2 ], [使用ZrCl 2(C 11 H ^ 8 NO 2)2 ],[使用ZrCl(C 6 H ^ 6 NO 2)3 ],[Zr的(C 6 H ^ 6 NO 2)4 ]和[Zr的(η-C 5 H ^ 5)(C 6 H 6 NO 2)3]。红外数据表明,所有的β-二酮酸酯配体都通过两个氧与金属中心配位。然而,在[ZrCl 2 L 2 ]和[ZrCIL 3 ]类型的络合物中,氰基也似乎是配位的。
New trisubstituted cyanopyrazoles and cyanoscorpionates
作者:Lava R. Kadel、John R. Kromer、Curtis E. Moore、David M. Eichhorn
DOI:10.1016/j.poly.2016.12.016
日期:2017.3
New syntheses are reported to give pyrazoles with cyano substituents at the 4-position of the pyrazole ring and ethyl or isopropyl substituents at the 3-position, as well as pyrazoles with cyano substituents at the 4-position and alkyl/aryl/bromo substituents at both the 3-and 5-positions. Synthesis of scorpionates using tetradecane as a high-boiling solvent has been shown to be more efficient than the melt method and has led to new scorpionates using the newly synthesized pyrazoles. An unexpected complex is isolated in which the Ni(cyclam)2(+) moiety crystallizes with two cyanoscorpionates as counterions, without binding of the scorpionate ligands to the Ni atom. (C) 2016 Elsevier Ltd. All rights reserved.
Musante, Gazzetta Chimica Italiana, 1939, vol. 69, p. 523,533
作者:Musante
DOI:——
日期:——
Acylated cyanatoarenes - reagents for convenient cyanations