一组外消旋ñ -苯基取代的β-amidoamidines盐酸盐4,其在结构上与天然抗病毒剂amidinomycin(1),在从甲基丙烯酰苯胺(起始的四个步骤来合成5)。在合成路线的最后步骤中,β-aminoamidine的一种罕见的单酰化8在较低反应性的β -苯基氨基的基团发生了。为了使该结果合理化,提出了一种机制,该机制涉及在更具活性的idine官能团上进行初始酰化,然后将分子内酰基基团转移至β-苯基氨基基团。所有三个带有长线性脂族链的β-ami基酰胺4d – f(来自n- C8 H 17至n C 12 H 25)表现出显着的体外抗甲型流感病毒(H3N2)活性和适度的细胞毒性。的体外抗病毒效力4D,ê比具有较低EC商业金刚乙胺的更大的6-20倍50值和较高的治疗指数。无毒的体内化合物4d – f在感染A型流感(H3N2)的小鼠中显示出有益的保护作用。
Transition metal-catalyzed process for addition of amines to carbon-carbon double bonds
申请人:Yale University
公开号:US06384282B2
公开(公告)日:2002-05-07
The present invention is directed to a process for addition of amines to carbon-carbon double bonds in a substrate, comprising: reacting an amine with a compound containing at least one carbon-carbon double bond in the presence a transition metal catalyst under reaction conditions effective to form a product having a covalent bond between the amine and a carbon atom of the former carbon-carbon double bond. The transition metal catalyst comprises a Group 8 metal and a ligand containing one or more 2-electron donor atoms. The present invention is also directed to enantioselective reactions of amine compounds with compounds containing carbon-carbon double bonds, and a calorimetric assay to evaluate potential catalysts in these reactions.
Asymmetric hydroamination of acrylonitrile derivatives catalyzed by Ni(II)-complexes
作者:Luca Fadini、Antonio Togni
DOI:10.1016/j.tetasy.2008.11.010
日期:2008.11
Chiral ferrocenyl tridentate phosphine ligands were synthesized and used in asymmetric hydroamination reactionscatalyzed by Ni(II)-complexes. Compounds of the type [Ni(PPP)L]2+, where L is a chloride, solvent molecule or a coordinated substrate, were isolated. The efficiency of these complexes in asymmetric catalysis was high when aliphatic or aromatic amines were reacted with electron-poor olefins
Asymmetric Catalytic Hydroamination of Activated Olefins in Ionic Liquids
作者:Luca Fadini、Antonio Togni
DOI:10.1002/hlca.200790048
日期:2007.2
The addition of a series of both aliphatic and aromatic amines to electron-poor olefins was investigated using [Ni(Pigiphos)(THF)]2+ as catalyst (with different counterions) in various ionicliquids based on imidazolium- and picolinium-salt derivatives. The catalysts gave rise to selectivities comparable to those obtained when the reaction was conducted in neat organic solvents (ee up to 66%), but
Selective and Nonselective Aza-Michael Additions Catalyzed by a Chiral Zirconium Bis-Diketiminate Complex
作者:Ibrahim El-Zoghbi、Myriam Kebdani、Todd J. J. Whitehorne、Frank Schaper
DOI:10.1021/om400544z
日期:2013.12.9
and reduces the reaction order in amine to first order. Other activated alkenes such as methacrylonitrile, crotonitrile, methyl acrylate, and cyclohexenone can be employed, but no reactivity is observed toward styrene or vinyl ethers. Primaryamines, secondary amines, and anilines can be employed as nucleophiles with activities correlating with their nucleophilicity, but the catalyst is unstable in
Light curing type paint resin for shade adjustment
申请人:Heraeus Kulzer GmbH
公开号:EP1428492A1
公开(公告)日:2004-06-16
A photocurable dental coating material comprises
(A) 40 - 60% by mass of a matrix resin:
(B) 60 - 40% by mass of a filler mixture
(C) 0.1 - 1 % by mass of one or more polymerization initiator(s)
(D) trace quantities of one or more dental pigments.
The material is useful in a method of adjusting the color of dental restorative parts by applying the coating material to the surface of the part, e.g. by brush, and curing the layer.