已经制备了一系列与甲氧胺有关的苯乙胺,并对其直接的α1受体激动剂活性进行了评估。已经观察到,对于其中含胺部分自由地采用许多构象的开环化合物如甲恶胺,羟基对于直接的α1-肾上腺素能活性是必需的。但是,当除去羟基时,除非胺被引入到更空间确定的结构中,否则活性的直接成分将大大降低。根据我们的研究,我们得出结论,为了使苯乙胺作为直接的α1受体激动剂具有活性,它应具有相对于取代的苯环而言处于完全延伸构象的β氮。为了获得最佳效价,氮应环外成饱和的六元环。只要胺占据相对于分子的芳族部分的空间的明确定义的区域,就可以进一步将环外或环内结合到另外的环中。一些更有效的化合物作为α1受体激动剂的ED50值约为1 X 10(-7)M。
Zr-Catalyzed Olefin Alkylations and Allylic Substitution Reactions with Electrophiles
作者:Judith de Armas、Stanley P. Kolis、Amir H. Hoveyda
DOI:10.1021/ja000693j
日期:2000.6.1
Disubstituted aryl olefins undergo efficient alkylations in the presence of 5 mol % Cp2ZrCl2, n-BuMgCl, and alkyl tosylates or alkyl bromides. In one class of reactions (Table 1), the resulting alkyl zirconocene (initial alkylation product) undergoes β-hydride abstraction with a hydrogen atom from within the substrate to afford allylic alkylation products (Scheme 5). In another category of reactions, where cyclic
Simple and Efficient Synthesis of 4,7‐Dimethoxy‐1(<i>H</i>)‐indene
作者:Xiang Zhang、Muralidhara Thimmaiah、Shiyue Fang
DOI:10.1080/00397910701319189
日期:2007.6.1
The synthesis and polymerization behavior of methoxy-substituted (indenyl) trichlorotitanium complexes
作者:Patrick Foster、Marvin D. Rausch、James C.W. Chien
DOI:10.1016/s0022-328x(96)06625-9
日期:1997.1
A variety of methoxy-substituted (indenyl)trichlorotitanium complexes were synthesized, and these precursors were used to polymerize styrene, ethylene, and propylene. The complexes, when activated with methylaluminoxane (MAO), show only low activity for alpha-olefin polymerization. Oxygen-aluminum coordination between the methoxy group and MAO could be the deactivating interaction.
BRAUN, M.;BERNARD, C., LIEBIGS ANN. CHEM., 1985, N 2, 435-437
作者:BRAUN, M.、BERNARD, C.
DOI:——
日期:——
SPIRO RING COMPOUNDS AS HEPATITIS C VIRUS (HCV) INHIBITORS