4-Substituted 5-nitroisoquinolin-1-ones from intramolecular Pd-catalysed reaction of N-(2-alkenyl)-2-halo-3-nitrobenzamides
作者:Archana Dhami、Mary F. Mahon、Matthew D. Lloyd、Michael D. Threadgill
DOI:10.1016/j.tet.2009.04.007
日期:2009.6
4-benzyl-5-aminoisoquinolin-1-ones are close analogues of the water-soluble PARP-1 inhibitor 5-AIQ. Their synthesis was approached through Pd-catalysed cyclisations of N-(2-alkenyl)-2-iodo-3-nitrobenzamides. Reaction of N,N-diallyl-2-iodo-3-nitrobenzamide with Pd(PPh3)4 gave a mixture of 2-allyl-4-methyl-5-nitroisoquinolin-1-one and 2-allyl-4-methylene-5-nitro-3,4-dihydroisoquinolin-1-one. N-Benzhydryl-N-cinn
4-甲基和4-苄基-5-氨基异喹啉-1-酮是水溶性PARP-1抑制剂5-AIQ的相似物。它们的合成通过N-(2-烯基)-2-碘-3-硝基苯甲酰胺的Pd催化环化来实现。的反应Ñ,Ñ二烯丙基-2-碘-3-硝基苯甲酰胺用Pd(PPH 3)4,得到2-烯丙基-4-甲基-5- nitroisoquinolin -1-酮的混合物和2-烯丙基-4-亚甲基5-硝基-3,4-二氢异喹啉-1-酮 N-苯甲基-N-肉桂基-2-碘-3-硝基苯甲酰胺类似地得到2-苯甲基-4-苄基-5-硝基异喹啉-1-酮和2-苯甲基-4-亚苄基-5-硝基-3,4-二氢异喹啉-1-酮。异构产物不可互换。氘标记研究表明,异构体是通过不同的途径形成的:π-烯丙基-Pd途径和经典的Heck途径。相应的仲酰胺N-烯丙基-2-碘-3-硝基苯甲酰胺和N -((取代的-肉桂基)-2-碘-3-硝基苯甲酰胺得到所需产率的4-甲基-和4-((取代的) -