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
[EN] USE OF DYNAMIC MIXTURES FOR A CONTROLLED RELEASE OF FRAGRANCES<br/>[FR] UTILISATION DE MELANGES DYNAMIQUES POUR LIBERATION CONTROLEE DE FRAGRANCES
申请人:FIRMENICH & CIE
公开号:WO2006016248A1
公开(公告)日:2006-02-16
The present invention relates to a delivery system in the form of a dynamic mixture obtained by reacting together, in the presence of water, at least one hydrazine derivative with at least one perfuming, flavoring, insect repellent or attractant, bactericide and/or fungicide aldehyde or ketone. The invention's mixture is capable of releasing in a controlled and prolonged manner said aldehyde or ketone in the surrounding environment. Furthermore, the present invention concerns also the use of said dynamic mixtures as perfuming ingredients as well as the perfuming compositions or perfumed articles comprising the invention's mixtures.
USE OF DYNAMIC MIXTURES FOR A CONTROLLED RELEASE OF FRAGRANCES
申请人:Lehn Jean-Marie
公开号:US20070141011A1
公开(公告)日:2007-06-21
The present invention relates to a delivery system in the form of a dynamic mixture obtained by reacting together, in the presence of water, at least one hydrazine derivative with at least one perfuming, flavoring, insect repellent or attractant, bactericide or fungicide aldehyde or ketone. The inventive mixture is capable of releasing in a controlled and prolonged manner the aldehyde or ketone in the surrounding environment. Furthermore, the present invention concerns also the use of these dynamic mixtures as perfuming ingredients as well as the perfuming compositions or perfumed articles that include such mixtures.
Nickel(II) chelates of unsaturated aroylhydrazones and their reactions with pyridines
作者:Salah S. Massoud、Lilian Labib、Magdi F. Iskander
DOI:10.1016/s0277-5387(00)81669-1
日期:1994.1
The reactions of nickel(II) acetate with cinnamaldehyde- and benzalacetone- aroylhydrazones(2) (R′ = H or CH3) afforded green octahedral paramagnetic NiL2·2H2O chelates, where L refers to the mononegative bidentate ligand. Upon dehydration of these chelates, brown and yellow square-planar diamagnetic complexes (α-series) were isolated, respectively. The in situ reactions of cinnamaldehyde and aroylhydrazines
A facile catalytic one-pot synthesis of N-acylhydrazones via acceptorless dehydrogenativecoupling of readily available alcohols and benzohydrazides (R2CONHNH2) using arene ruthenium (II) complexes has been described. The coupling of alcohols with various benzohydrazides using ruthenium catalysts provide a wide range of N-acylhydrazones in good to excellent yields (63–93%; 32 examples). The present
已经描述了使用芳烃钌 (II) 配合物通过容易获得的醇和苯并酰肼 (R 2 CONHNH 2 ) 的无受体脱氢偶联,轻松催化一锅法合成N-酰基腙。使用钌催化剂将醇与各种苯并酰肼偶联提供了广泛的N-酰基腙具有良好至极好的收率(63–93%;32 个例子)。本协议提供了高选择性的腙,没有任何烷基化产物,并耐受一系列官能团。对照实验表明,该机制通过醇的无受体脱氢进行,氢和水是唯一的副产物。克级合成说明了本策略的有用性。