Application of Continuous Flow-Flash Chemistry to Scale-up Synthesis of 5-Cyano-2-formylbenzoic Acid
作者:Masaki Seto、Shinichi Masada、Hirotsugu Usutani、David G. Cork、Koichiro Fukuda、Tetsuji Kawamoto
DOI:10.1021/acs.oprd.9b00180
日期:2019.7.19
Efficient scale-up synthesis of 5-cyano-2-formylbenzoic acid or its cyclic isomer 6-cyano-3-hydroxy-2-benzofuran-1(3H)-one (1) as a keyintermediate for various biologically important compounds has been achieved from isopropyl 2-bromo-5-cyanobenzoate (8c) by means of continuous flow-flash chemistry using flow microreactors. It was found that Br/Li exchange reaction of 8c, bearing both a carboisopropoxy
有效地按比例放大合成5-氰基-2-甲酰基苯甲酸或其环状异构体6-氰基-3-羟基-2-苯并呋喃-1(3 H)-一(1)作为各种生物学上重要的化合物的关键中间体通过使用流动微反应器的连续流动闪蒸化学方法,从2-溴-5-氰基苯甲酸异丙酯(8c)中获得了上述化合物。结果发现,在-50℃下,带有碳异丙氧基和氰基的8c与BuLi的Br / Li交换反应在0.1 s内发生,所得高反应性芳基锂中间体与DMF甲酰化,得到1,这是通过常规批处理过程很难实现的。连续流动闪蒸反应条件的优化和反应体系的改进导致在270分钟内从897 g 8c生成237 g 1。结果表明,通过使用流动微反应器的流动闪蒸化学,可以从相应的2-溴苯甲酸酯方便地合成带有亲电基团的邻苯二酸衍生物。
SYNTHESIS AND USE OF DUAL TYROSYL-DNA PHOSPHODIESTERASE I (Tdp1) - TOPOISOMERASE I (Top1) INHIBITORS
申请人:Purdue Research Foundation
公开号:US20150133445A1
公开(公告)日:2015-05-14
The invention described herein pertains to the synthesis and use of certain N-substituted indenoisoquinoline compounds which inhibit the activity Tyrosyl-DNA Phosphodiesterase I (Tdp1) or Topoisomerase I (Top1) or both, or otherwise demonstrate anticancer activity. Also disclosed are novel N-substituted indenoisoquinoline compounds and pharmaceutical compositions comprising the novel N-substituted indenoisoquinoline compounds.
Discovery of Potent Indenoisoquinoline Topoisomerase I Poisons Lacking the 3-Nitro Toxicophore
作者:Daniel E. Beck、Monica Abdelmalak、Wei Lv、P. V. Narasimha Reddy、Gabrielle S. Tender、Elizaveta O’Neill、Keli Agama、Christophe Marchand、Yves Pommier、Mark Cushman
DOI:10.1021/acs.jmedchem.5b00303
日期:2015.5.14
3-Nitroindenoisoquinoline human topoisomerase IB (Top1) poisons have potent antiproliferative effects on cancer cells. The undesirable nitro toxicophore could hypothetically be replaced by other functional groups that would retain the desired biological activities and minimize potential safety risks. Eleven series of indenoisoquinolines bearing 3-nitro bioisosteres were synthesized. The molecules were evaluated in the Top1-mediated DNA cleavage assay and in the National Cancer Institute's 60 cell line cytotoxicity assay. The data reveal that fluorine and chlorine may substitute for the 3-nitro group with minimal loss of Top1 poisoning activity. The new information gained from these efforts can be used to design novel indenoisoquinolines with improved safety.