在1-位上带有溴或三氟甲基磺酰氧基取代基的取代的2-(新戊酰氨基)苯硼酸和3,6-二取代的-10-甲基ac啶酮13之间的Pd(0)介导的偶联产生可被环化成的中间体1-芳基rid啶酮16新的8-甲基喹[4,3,2-kl] ac啶17与氯氧化磷或6 M HCl的乙醇溶液。用三氟甲磺酸酯取代的底物17和丙烯酸衍生物之间的heck反应得到在6-位具有不饱和侧链的喹诺啶啶。由9-硼环[3,3,1]壬烷(9-BBN)与乙酸烯丙酯或N-烯丙基三氟乙酰胺相互作用制得的炔烷参加了Suzuki-Miyaura反应,与氯取代的8-甲基喹诺啶啶形成带有官能化丙基的衍生物在6位和10位
Suzuki-aza-Wittig, Suzuki-condensation and aza-Wittig-electrocyclic ring-closure tandem reactions for synthesis of fused nitrogen-containing ring systems
We describe tandem combinations of Suzuki-aza-Wittig, Suzuki-condensation and aza-Wittigelectrocyclic ring closure reactions for the synthesis of new pyridazino[4,5-c]isoquinolinone, pyridazino[4,5-c]quinolinone and pyrimido[5,4-c]quinoline derivatives.
diazino-fused indole and cinnoline derivatives. Suzuki coupling of 5-amino-6-chloro-1,3-dimethyluracil with 2-formylphenyl boronic acid afforded a novel pyrimidoisoquinoline ring system in a one-pot reaction.
New synthetic pathways have been elaborated to 1-methyl-1H-pyridazino[3,4-b]indoles starting from halopyridazin-3(2H)-ones. Suzuki cross-coupling reaction of chloro, iodo, dichloro, and dibromo substituted pyridazin-3(2H)-ones with 2-pivaloylaminophenylboronic acid followed by hydrolysis of the amide and subsequent ring closure via condensation gave fused indoles. Some of these compounds showed biological
从halopyridazin-3(2 H)-ones开始,新的合成途径已被阐明为1-methyl-1 H -pyridazino [3,4- b ]吲哚。氯,碘,二氯和二溴取代的哒嗪-3(2 H)-与2-新戊酰基氨基苯基硼酸的Suzuki交叉偶联反应,然后水解酰胺,随后通过缩合闭环,得到稠合的吲哚。这些化合物中的一些显示出作为抗胰锥虫剂的生物活性。
Two new ellipticine analogues were synthetized as potential non nucleoside inhibitors of reverse transcriptase and were tested on Moloney leukaemia virus reverse transcriptase in vitro. Both derivatives (9a,b) showed considerable inhibitory effect; ID50 was found to be in the range of 2.8 to 4.5 x 10(-5) M. \ Copyright (C) 1996 Elsevier Science Ltd