甲氧基咔唑类化合物的合成及其体外抗肿瘤活性

目的设计合成新型甲氧基咔唑类抗肿瘤化合物。方法将4，5-二甲氧基-2-溴硝基苯与甲氧基碘代苯化合物在铜粉催化下经Ullmann反应制得甲氧基-硝基联苯化合物，再经亚磷酸三乙酯还原得三种甲氧基咔唑。对9-位氮进行修饰，合成了16个衍生物。利用核磁共振、质谱、红外光谱和元素分析进行了结构确认。结果体外初步抗肿瘤活性测试结果显示，目标物4_c，5_a，5_b，5_g，5_h，5_i，5_I，5n和5_p对人结肠癌HT-29细胞的IC₅₀值分别12.1，10.6，8.1，3.1，4.4，10.1及9.2 μmol·L^-1。目标物4_a对人口腔上皮癌KB细胞的IC₅₀值为17.7 μmol·L^-1。结论部分目标化合物对HT-29及KB肿瘤细胞具有较好的抑制作用。

Synthesis and in vitro antitumor activity of multi-methoxyl carbazole analogues

AIM: To design and synthesize new methoxyl carbazole analogues as antitumor compounds. METHODS: Methoxyl-nitrobiphenyls (3a-3c) were prepared through the Ullmann reaction of 4,5-dimethoxyl-2-bromonitrobenzene and methoxyl-iodobenzene compounds with the catalysis of copper powder, and then reduced by P(EtO)3 to obtain methoxyl carbazoles 4a-4c. The modification at 9-position of the methoxyl carbazoles (4a-4c) gives 16 carbazole derivatives (5a-5p). These compounds were confirmed by 1HNMR, MS, IR and elemental analysis. RESULT: In vitro antitumor activities evaluation in vitro demonstrated that IC50 value of the target compounds 4c, 5a, 5b, 5g, 5h, 5i, 5l, 5n and 5p against HT-29 cells were 12.1, 10.6, 8.1, 3.1, 4.4, 10.1 and 9.2 micromol x L(-1) respectively, and IC50 value of the target compound 4a against KB was 17.7 micromol x L(-1). CONCLUSION: Some of the target compounds have better inhibitory effects against H-29 and KB cells.