substituted benzenediazonium tetraphenylborates to form 1,2,4,3λ4-triazaborines or 1,3,2λ4-oxazaborines. The formation of either the first or the second product is affected by the reaction conditions, especially by the presence of water in the reaction components and in the solvent. If the reaction is performed under anhydrous conditions, the major product is the triazaborine. When ‘wet’ diazoniumsalts are
Modular Routes Towards New N,O-Bidentate Ligands Containing an Electronically Delocalised β-Enaminone Chelating Backbone
作者:Udo Beckmann、Eva Eichberger、Monika Lindner、Melanie Bongartz、Peter C. Kunz
DOI:10.1002/ejoc.200800372
日期:2008.8
Nickel complexes with N,O-chelating ligands turned out to be promising catalysts in that field. In this work a series of newN,O ligands with an electronicallydelocalisedβ-enaminonebackbone were synthesised and fully characterised. The ligand design was inspired by the ligand found in the most efficient nickel catalyst for polyketone synthesis and developed to a highly modular LEGO®-like arsenal of
THE STRUCTURE AND GRIGNARD REACTION OF THE β-AMINOCROTONONITRILE
作者:Jaspar J. Conn、Alfred Taurins
DOI:10.1139/v53-156
日期:1953.12.1
The ultravioletabsorptionspectra of the low and high melting forms of β-aminocrotononitrile (I) provide evidence that both of them possess the same enamine structure. Since the existence of the polymorphic modifications of I must be excluded on the basis of the thermochemical behavior of I, the difference of the two modifications is capable of accounting for cis and trans isomerism, the low melting
β-氨基巴豆腈 (I) 的低熔点和高熔点形式的紫外吸收光谱提供证据表明它们都具有相同的烯胺结构。由于必须根据 I 的热化学行为排除 I 的多晶型修饰的存在,因此两种修饰的差异能够解释顺式和反式异构现象,低熔点修饰为顺式,高熔点修饰为顺式。熔融改性是反式形式。在 I 与芳香格氏试剂的反应中,CH3-CO-CH==C(NH2)-R 类型的 β-氨基酮作为主要反应产物形成。 I 的形成是假设的。
Kurtz et al., Justus Liebigs Annalen der Chemie, 1959, vol. 624, p. 1,19