Molecular modeling of 3-arylisoquinoline antitumor agents active against A-549. A comparative molecular field analysis study
作者:Won-Jea Cho、Eui-Ki Kim、Il Yeong Park、Eun Young Jeong、Tae Sung Kim、Thanh Nguyen Le、Dae-Duk Kim、Eung-Seok Lee
DOI:10.1016/s0968-0896(02)00137-2
日期:2002.9
A series of 58 3-arylisoquinoline antitumor agents were investigated for defining the pharmacophore model using comparative molecular field analysis (CoMFA) program. The studied compounds related to bioisostere of benzophenanthridine alkaloid were synthesized and evaluated for antitumor cytotoxicity against human lung tumor cell (A 549). In order to perform the systematic molecular modeling study of these compounds, the conformational search was carried out based on the single X-ray crystallographic structure of 7,8-dimethoxy-3-phenylisoquinolin-(2H)-one (2). Interestingly, two types of structures having different dihedral angles between the isoquinoline ring and 3-aryl ring were found in the crystals. Therefore, CoMFA was performed two different, overlapping ways. The alignments of the structures were based on the common isoquinoline ring and 3-aryl ring. The 3-D-quantitative structure-activity relationship study resulted in significant cross-validated, conventional r(2) values equal to 0.715 and 0.927, respectively. (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of Oxychelerythrine Using Lithiated Toluamide-Benzonitrile Cycloaddition
作者:Thanh Nguyen Le、Won-Jea Cho
DOI:10.1248/cpb.53.118
日期:——
Oxychelerythrine, benzo[c]phenanthridine alkaloid, was synthesized from easily available starting toluamide 5 and benzonitrile 6 using toluamide-benzonitrile cycloaddition reaction in 6 steps.