作者:Olivier R. Barbeau、Celine Cano-Soumillac、Roger J. Griffin、Ian R. Hardcastle、Graeme C. M. Smith、Caroline Richardson、William Clegg、Ross W. Harrington、Bernard T. Golding
DOI:10.1039/b705095j
日期:——
8-Substituted 2-morpholin-4-yl-quinolin-4-ones and 9-substituted 2-morpholin-4-yl-pyrido[1,2-a]pyrimidin-4-ones with selected aryl and heteroaryl groups as the substituent have been synthesised as potential inhibitors of DNA-dependent protein kinase. A multiple-parallel approach, employing Suzuki cross-coupling methodology, was utilised in the preparation of 8-substituted 2-morpholin-4-yl-quinolin-4-ones. For this purpose 8-bromo-2-morpholin-4-yl-quinolin-4-one was required as an intermediate. This compound was obtained by adapting a literature route in which thermal cyclocondensation of (2-bromoanilino)-morpholin-4-yl-5-methylene-2,2-dimethyl[1,3]dioxane-4,6-dione afforded 8-bromo-2-morpholin-4-yl-quinolin-4-one. A multiple-parallel approach, employing Suzuki cross-coupling methodology, was also utilised to prepare 9-substituted 2-morpholin-4-yl-pyrido[1,2-a]pyrimidin-4-ones using 9-hydroxy-2-morpholin-4-yl-pyrido[1,2-a]pyrimidin-4-one O-trifluoromethanesulfonate as an intermediate. 8-Substituted 2-morpholin-4-yl-quinolin-4-ones and 9-substituted 2-morpholin-4-yl-pyrido[1,2-a]pyrimidin-4-ones were both inhibitors of DNA-dependent protein kinase. When the substituent was dibenzothiophen-4-yl, dibenzofuran-4-yl or biphen-3-yl, IC50 values in the low nanomolar range were observed. Interestingly, the pyridopyrimidinones and quinolinones were essentially equipotent with the corresponding 8-substituted 2-morpholin-4-yl-chromen-4-ones previously reported (I. R. Hardcastle, X. Cockcroft, N. J. Curtin, M. Desage El-Murr, J. J. J. Leahy, M. Stockley, B. T. Golding, L. Rigoreau, C. Richardson, G. C. M. Smith and R. J. Griffin, J. Med. Chem., 2005, 48, 7829–7846).
以选定的芳基和杂芳基为取代基合成了 8-取代的 2-吗啉-4-基-喹啉-4-酮和 9-取代的 2-吗啉-4-基-吡啶并[1,2-a]嘧啶-4-酮,作为 DNA 依赖性蛋白激酶的潜在抑制剂。在制备 8-取代的 2-吗啉-4-基-喹啉-4-酮的过程中,采用了铃木交叉偶联法的多重平行方法。为此,需要 8-溴-2-吗啉-4-基-喹啉-4-酮作为中间体。这种化合物是通过调整文献路线获得的,在该路线中,(2-溴苯胺基)-吗啉-4-基-5-亚甲基-2,2-二甲基[1,3]二噁烷-4,6-二酮的热环缩合得到 8-溴-2-吗啉-4-基-喹啉-4-酮。以 9-羟基-2-吗啉-4-基-吡啶并[1,2-a]嘧啶-4-酮 O-三氟甲磺酸酯为中间体,利用铃木交叉偶联法制备了 9-取代的 2-吗啉-4-基-吡啶并[1,2-a]嘧啶-4-酮。8-取代的 2-吗啉-4-基-喹啉-4-酮和 9-取代的 2-吗啉-4-基-吡啶并[1,2-a]嘧啶-4-酮都是 DNA 依赖性蛋白激酶的抑制剂。当取代基为二苯并噻吩-4-基、二苯并呋喃-4-基或二苯并噻吩-3-基时,观察到的 IC50 值在纳摩尔范围内。有趣的是,吡啶嘧啶酮和喹啉酮与之前报道的相应的 8-取代 2-吗啉-4-基-苯并吡喃-4-酮基本等效(I. R. Hardcastle、X. Cockcroft、N. J. Curtin、M. Desage El-Murr、J. J. J. Leahy、M. Stockley、B. T. Golding、L. Rigoreau、C. Richardson、G. C. M. Smith 和 R. J. Griffin,J. Med.Chem.,2005,48,7829-7846)。