Synthesis of novel DNA cross-linking antitumour agents based on polyazamacrocycles
摘要:
We are seeking to develop more effective alkylating agents as antitumour agents. In previous work conformationally restricted nitrogen mustards were synthesised containing piperidine or pyrrolidine rings. The free bases were designed to be bifunctional alkylating agents via aziridinium ion formation and the effects of varying the distances between the two alkylating sites were studied. Some efficient cross-linkers of naked DNA were prepared but few of these compounds exhibited significant cytotoxicity in human tumour cells in vitro. We have extended this work by making tri- and tetra-azamacrocyclic compounds containing two to four potential alkylating sites. Most of these compounds were powerful DNA alkylating agents and showed cytotoxicity (IC(50) values 6-100 mu M) comparable with chlorambucil (45 mu M) and melphalan (8.5 mu M). In particular the cyclen derivative 2a was more than 10(4) times more effective at cross-linking DNA (2a XL(50) << 10 nM) than chlorambucil (XL(50) 100 mu M), and showed significant cytotoxicity in human tumour cells in vitro. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis and Copper(I) Complexes of a Series of 9- to 13-Membered N<sub>3</sub>Macrocycles
作者:Markus Briellmann、Susan Kaderli、Charles J. Meyer、Andreas D. Zuberbühler
DOI:10.1002/hlca.19870700318
日期:1987.5.6
hexaamines have been isolated and characterized as major by-products. The complexation of Cu(I) by the triamines has been studied potentiometrically in CH3CN/H2O. All ligands L form ternary complexes [Cu(CH3CN)L]+. The corresponding association constants vary between 1011 and 107, decreasing with increasing ring size. In addition, complexes [Cu(CH3CN)yLH]2+, y = 1 or 2, are found as less important species
通过对甲苯磺酸法合成了8个环大小在9至13之间的环状三胺。开链三胺双(2-氨基乙基)胺(dien)和双(3-氨基丙基)胺(二丙醇)用作起始原料。在某些情况下,相应的二聚环己胺已被分离出来并表征为主要副产物。已经在CH 3 CN / H 2 O中对三胺与Cu(I)的络合物进行了电位分析。所有配体L形成三元络合物[Cu(CH 3 CN)L] +。相应的缔合常数在10 11和10 7之间变化,随环尺寸的增加而减小。此外,络合物[Cu(CH 3 CN)y LH] 2 +, y = 1或2,是次重要的物种,最大浓度为7%至50%。
Synthesis of 24-, 26-, 32- and 36-membered macrocyclic polyamines via a (2+2) cyclization process
作者:V. Panetta-Le Mer、J.J. Yaouanc、H. Handel
DOI:10.1016/0040-4039(94)85214-6
日期:1994.4
At high concentration, N-pertriflated polyamines and ω,ω′-dihalogenoalkanes react to yield large polyazamacrocycles according to a (2+2) cyclization mode.
在高浓度下,N-全杂多胺和ω,ω'-二卤代烷烃根据(2 + 2)环化模式反应生成大的聚氮杂大环。
Image making medium
申请人:——
公开号:US20030035917A1
公开(公告)日:2003-02-20
The invention relates to an image support medium for creation of an aesthetic image that is an work or object for display. This support medium includes a polymer in an amount sufficient to enable the image to have at least one aesthetic element. In different embodiments, the image support medium is an image support stabilizer, the polymer is a synthetic absorbent or conductive polymer, or the polymer is a transparent or synthetic translucent polymer and a property of this transparent or translucent polymer is enhanced to facilitate the creation or preservation of the image by at least one stabilizer. The invention also relates to a method for preparing this image support medium. The method includes forming a reaction mixture comprising a monomer in an amount sufficient to provide or enable the image to have an aesthetic element, and processing the reaction mixture into a 2- or 3-dimensional shape.