Synthesis, Photochemical Synthesis and Antitumor Evaluation of Novel Derivatives of Thieno[3',2':4,5]thieno[2,3-c]quinolones.
作者:Jasna DoganKoruznjak、Neda Slade、Branimir Zamola、Kresimir Pavelic、Grace Karminski-Zamola
DOI:10.1248/cpb.50.656
日期:——
The novel derivatives of thieno[3′,2′:4,5]thieno[2,3-c]quinolones 6a, 6b, 7, 10a and 10b were synthesized in multistep synthesis starting from thiophene-3-carboxaldehyde and malonic acid reacting in aldol condensation or from 3-bromothiophenes or methyl 4-bromothiophene-2-carboxylate reacting in Heck reaction. They resulted in corresponding substituted thienylacrylic acids 3a—c, which were cyclized into thieno[2,3-c]thiophene-2-carbonyl chlorides 4a—c and converted into thieno[2,3-c]thiophene-2-carboxamides 5a—d. Prepared carboxamides were photochemically dehydrohalogenated into corresponding substituted thieno[3′,2′:4,5]thieno[2,3-c]quinolones 6a—d. Compound 7 was prepared from 6d by alkylation with N-[3-(dimethylamino)propyl]chloride hydrochloride in the presence of NaH. Compounds 10a and 10b were prepared from 6c in the multistep synthesis over acid 8 and acid chloride 9. Compounds 6a, 6b, 7, 10a and 10b were found to exert cytostatic activities against malignant cell lines: pancreatic carcinoma (MiaPaCa2), breast carcinoma (MCF7), cervical carcinoma (HeLa), laryngeal carcinoma (Hep2), colon carcinoma (CaCo-2), melanoma (HBL), and human fibroblast cell lines (WI-38). The compound 6b, which bears the 3-dimethylaminopropyl substituent on quinolone nitrogen and methoxycarbonyl substituent on position 9, exhibiedt marked antitumor activity. On the contrary, compound 7, which also bears the 3-dimethylaminopropyl substituent on the quinolone nitrogen but anilido substituent on position 9, exhibited less antitumor activity than the others.
新合成的噻吩[3′,2′:4,5]噻吩[2,3-c]喹诺酮6a、6b、7、10a和10b通过多步合成法制备,起始原料为噻吩-3-羧醛和丙二酸,经过羟基醛缩合反应,或者从3-溴噻吩或甲基4-溴噻吩-2-羧酸酯通过赫克反应获得。它们最终得到相应的取代噻吩丙烯酸3a—c,这些产物进一步环化成噻吩[2,3-c]噻吩-2-氯甲酰基氯4a—c,并转化为噻吩[2,3-c]噻吩-2-羧酰胺5a—d。所制备的羧酰胺经过光化学脱卤化反应转化为相应的取代噻吩[3′,2′:4,5]噻吩[2,3-c]喹诺酮6a—d。化合物7是通过与N-[3-(二甲氨基)丙基]氯化氢在NaH存在下进行烷基化反应,从化合物6d制得的。化合物10a和10b则是从化合物6c经过对酸8和酸氯化物9的多步合成制得的。化合物6a、6b、7、10a和10b对多种恶性细胞系表现出细胞抑制活性,包括胰腺癌(MiaPaCa2)、乳腺癌(MCF7)、宫颈癌(HeLa)、喉癌(Hep2)、结肠癌(CaCo-2)、黑色素瘤(HBL)以及人纤维母细胞系(WI-38)。化合物6b在喹诺酮氮上有3-二甲氨基丙基取代基,9位有甲氧基羰基取代基,显示出显著的抗肿瘤活性。相反,化合物7虽然在喹诺酮氮上也有3-二甲氨基丙基取代基,但在9位则有苯胺取代基,表现出的抗肿瘤活性相对较低。