以取代靛红,(E)-硝基异噁唑芳烯烃和苯基甘氨酸为原料,乙腈为溶剂,经1,3-偶极子3+2环加成反应合成了8个新型的异噁唑拼接吡咯螺环氧化吲哚化合物(3a~3h),产率41%~62%,d/r值为2∶1~10∶1,其结构经~1H NMR,~(13)C NMR和HR-ESI-MS表征。采用MTT法研究了3a~3h对人肺癌细胞(A549),人前列腺(PC-3)和人白血病细胞(K562)的体外抗肿瘤活性。结果表明:3a,3b和3c分别对K562,PC-3和A549具有较好的抑制活性,其对应的IC50为16.0μmol·L~(-1),21.2μmol·L~(-1)和24.4μmol·L~(-1),优于顺铂(26.1μmol·L~(-1),27.2μmol·L~(-1)和25.6μmol·L~(-1))。
Eight isoxazole-fused spiropyrrolidine oxindoles( 3a ~ 3h),in yields of 41% ~ 62% with d/r of 2 ∶ 1 ~ 10 ∶ 1,were synthesized by 1,3-dipolar cycloaddition reaction,using N-substituted isatins,3-methyl-4-nitro-5-alkenyl-isoxazoles and 2-phenylglycine as materials and Me CN as solvent. The structures were characterized by~1 H NMR,~(13)C NMR and HR-ESI-MS. The in vitro antitumor activities of 3a ~ 3h against human prostate cancer cells( PC-3),human lung cancer cells( A549) and human leukemia cells( K562) were investgated by MTT method. The results demonstrated that 3a,3b and 3c exhibited good inhibition activities against K562,PC-3 and A549 with IC50 of 16. 0 μmol·L~(-1),21. 2μmol·L~(-1)and 24. 4 μmol·L~(-1),which were better than Cisplatin( 26. 1 μmol·L~(-1),27. 2 μmol·L~(-1)and 25. 6 μmol·L~(-1)) 。