Ruthenium catalyzed synthesis of secondary or tertiary amines from amines and alcohols
作者:Shun-Ichi Murahashi、Kaoru Kondo、Toshiyuki Hakata
DOI:10.1016/s0040-4039(00)86792-1
日期:1982.1
Unsymmetrical secondary and tertiary amines are prepared by the rutheniumcatalyzed reaction of alcohols with amines, which provides highly efficient method for synthesis of cyclic amines.
Facile Synthesis and Isolation of Secondary Amines <i>via</i>
a Sequential Titanium(IV)-Catalyzed Hydroamination and Palladium-Catalyzed Hydrogenation
作者:Erica K. J. Lui、Laurel L. Schafer
DOI:10.1002/adsc.201500861
日期:2016.3.3
alkyl‐substituted secondary amines has been developed. Using a bis(amidate)bis(amido)titanium(IV) precatalyst, the hydroamination of terminal alkynes with a range of amines results in the selective formation of the anti‐Markovnikov product. The crude enamine/imine mixtures are effectively hydrogenated using palladium on carbon (Pd/C) and H2 to afford the corresponding secondary amine in excellent yields.
Design of a Bifunctional Ir-Zr Based Metal-Organic Framework Heterogeneous Catalyst for the N-Alkylation of Amines with Alcohols
作者:A. M. Rasero-Almansa、A. Corma、M. Iglesias、F. Sánchez
DOI:10.1002/cctc.201402101
日期:2014.6
The direct N‐alkylation of amines with alcohols was performed with an Ir‐Zr‐based metal–organic framework multifunctional heterogeneous catalyst. This system is efficient and environmentally benign for the synthesis of various organic amines in air in the absence of a base. The catalyst was recovered and reused without significant loss of activity, and only water was produced as a byproduct.
Aqueous ink composition for use in an ink-jet printer
申请人:SEIKO EPSON CORPORATION
公开号:EP0838508A2
公开(公告)日:1998-04-29
An aqueous ink composition for ink jet printers, which gives reliable printing performance and yields printed images which have excellent print quality and which dry rapidly is disclosed. The ink compositions are suitable for printing on plain paper. The ink comprises water as the principal solvent, an anionic colorant, pectic acid, a base, and at least one of a penetrable solvent and/or a penetrability-imparting surfactant. The pectic acid is composed primarily of α-1,4 linked polygalacturonic acid having a degree of esterification not more than 5% where the degree of esterification is defined as the percentage of the total number of galacturonic acid units in the pectic acid which are esterified.
A plaque tack can be used for holding plaque against blood vessel walls such as in treating atherosclerotic occlusive disease. The plaque tack can be formed as a thin, annular band for holding loose plaque under a spring or other expansion force against a blood vessel wall. Focal elevating elements and/or other features, such as anchors, can be used to exert a holding force on a plaque position while minimizing the amount of material surface area in contact with the plaque or blood vessel wall and reducing the potential of friction with the endoluminal surface. This approach offers clinicians the ability to perform a minimally invasive post-angioplasty treatment and produce a stent-like result without using a stent.