Concise Synthesis and Biological Evaluation of 2-Aroyl-5-Amino Benzo[<i>b</i>]thiophene Derivatives As a Novel Class of Potent Antimitotic Agents
作者:Romeo Romagnoli、Pier Giovanni Baraldi、Carlota Lopez-Cara、Delia Preti、Mojgan Aghazadeh Tabrizi、Jan Balzarini、Marcella Bassetto、Andrea Brancale、Xian-Hua Fu、Yang Gao、Jun Li、Su-Zhan Zhang、Ernest Hamel、Roberta Bortolozzi、Giuseppe Basso、Giampietro Viola
DOI:10.1021/jm4013938
日期:2013.11.27
The biological importance of microtubules make them an interesting target for the synthesis of antitumor agents. The 2(3',4',5'-trimethoxybenzoyl)-5-aminobenzo[b]thiophene moiety was identified as a novel scaffold for the preparation of potent inhibitors of microtubule polymerization acting through the colchicine site of tubulin. The position of the methoxy group on the benzo[b]thiophene was important for maximal antiproliferative activity. Structure-activity relationship analysis established that the best activities were obtained with amino and methoxy groups placed at the C-5 and C-7 positions, respectively. Compounds 3c-e showed more potent inhibition of tubulin polymerization than combretastatin A-4 and strong binding to the colchicine site. These compounds also demonstrated substantial antiproliferative activity, with IC50 values ranging from 2.6 to 18 nM in a variety of cancer cell lines. Importantly, compound 3c (50 mg/kg), significantly inhibited the growth of the human osteosarcoma MNNG/HOS xenograft in nude mice.