Rotaxane Formation by Cucurbit[7]uril in Water and DMSO Solutions
作者:Sanem Senler、Beijun Cheng、Angel E. Kaifer
DOI:10.1021/ol502479k
日期:2014.11.21
The cucurbit[7]uril (CB7) host forms rotaxane-type complexes with dumbbell-shaped, cationic guests bis(3,5-dimethoxybenzyl)-4,4′-bipyridinium (12+) and bis(3,5-diethoxybenzyl)-4,4′-bipyridinium (22+). The kinetics of complex formation is slower with the latter guest because of its bulkier end groups. Rotaxane formation was found to be thermodynamically more favorable and kinetically faster in D2O than
葫芦[7] uril(CB7)宿主与哑铃形阳离子客体双(3,5-二甲氧基苄基)-4,4'-联吡啶(1 2+)和双(3,5-二乙氧基苄基)形成轮烷型复合物)-4,4'-联吡啶(2 2+)。后者的客体由于其庞大的端基而形成复合物的动力学较慢。发现轮状烷在D 2 O中比DMSO- d 6溶液在热力学上更有利,并且动力学上更快,这突出了葫芦素配合物组装过程中疏水相互作用的重要性。
Synthesis and potent antileukemic activities of 10-benzyl-9(10H)-acridinones
作者:Chunmei Gao、Yuyang Jiang、Chunyan Tan、Xuyu Zu、Huachen Liu、Derong Cao
DOI:10.1016/j.bmc.2008.07.086
日期:2008.9
A novel series of 10-benzyl-9(10H)-acridinones and 1-benzyl-4-piperidones were synthesized and tested for their in vitro antitumor activities against CCRF-CEM cells. Assay-based antiproliferative activity study using CCRF-CEM cell lines revealed that the acridone group and the substitution pattern on the benzene unit had significant effect on cytotoxicity of this series of compounds, among which 10-(3,5-dimethoxy) benzyl-9(10H)-acridinone (3b) was found to be the most active compound with IC(50) at about 0.7 mu M. Compound 3b was also found to have antiproliferative activity against two other human leukemic cell lines K562 and HL60 using the MTT assay. The antitumor effect of 3b is believed to be due to the induction of apoptosis, which is further confirmed by PI ( Propidium iodide) staining and Annexin V-FITC/PI staining assay using flow cytometry analysis. (C) 2008 Elsevier Ltd. All rights reserved.