作者:NESLİHAN DEMİRBAŞ、AHMET DEMİRBAŞ、HACER BAYRAK、HAKAN BEKTAŞ、ŞENGÜL ALPAY KARAOĞLU
DOI:10.3906/kim-1004-570
日期:——
The synthesis of ethyl [3-(cyanomethyl)-5-alkyl-4H-1,2,4-triazol- 4-yl]carbamates (2a-d) was performed starting from ethyl 2-[ethoxy(4- (aryl)methylene]hydrazinecarboxylates (1a, 1b). The treatment of 2a with thiosemicarbazide afforded ethyl [3-[(5-amino-1,3,4-thiadiazol- 2-yl)methyl]-5-(4-nitrophenyl)-4H-1,2,4-triazol-4-yl]carbamates (3a), whereas compound 2b produced 5-[4-amino-5-(4-methylphenyl)- 4H-1,2,4-triazol-3-yl]methyl}-1,3,4-thiadiazol-2-amine (3b) in the same reaction conditions. The treatment of tert-butyl 2-[2-(4-chlorophenyl)-1-ethoxyethylidene]hydrazinecarboxylate (5) with malonohydrazide or cyanoacethydrazide gave the corresponding 1,2,4-triazol-ylcarbamate derivatives (6 or 9); then the hydrolysis of these compounds resulted in the formation of 3-[4-amino-5-(4- chlorobenzyl)-4H-1,2,4-triazol-3-yl]methyl}-5-(4-chlorobenzyl)-4H- 1,2,4-triazol-4-amine (7) and [4-amino-5-(4-chlorobenzyl)-4H- 1,2,4-triazole-3-yl]acetonitrile (10), respectively. The synthesis of the Schiff base derivatives 3-(4-chlorobenzyl)-5-[5-(4-chloroben- zyl)-4-[(2-hydroxyphenyl-methylene)amino]-4H-1,2,4-triazol-3-yl]methyl} -N-(2-hydroxyphenylmethylene)-4H-1,2,4-triazol-4-amine (8), and (5-(4-chlorobenzyl)-4-[(2,6-dichlorophenyl)methylene]amino}-4H-1,2,4- triazol-3-yl)acetonitrile (12) was performed from the reaction of compounds 7 and 10 with salicyl aldehyde (for 8) or 2,6-dichlorobenzaldehyde (for 12), respectively. The treatment of compounds 5 or 10 with thiosemicarbazide gave 5-[4-amino-5-(4-chlorobenzyl)-4H-1,2,4-triazol- 3-yl]methyl}-1,3,4-thiadiazol-2-amine (11). All the newly synthesized compounds were screened for their antimicrobial activities and were found to possess good or moderate antimicrobial activity.
合成乙基[3-(氰甲基)-5-烷基-4H-1,2,4-三氮唑-4-基]氨基甲酸酯(2a-d)是从乙基2-[乙氧基(4-芳基)亚甲基]肼甲酸酯(1a, 1b)开始进行的。将化合物2a与硫半脲反应后得到了乙基[3-[(5-氨基-1,3,4-噻二唑-2-基)甲基]-5-(4-硝基苯基)-4H-1,2,4-三氮唑-4-基]氨基甲酸酯(3a),而化合物2b则在相同反应条件下产生了5-[4-氨基-5-(4-甲基苯基)-4H-1,2,4-三氮唑-3-基]甲基}-1,3,4-噻二唑-2-胺(3b)。将叔丁基2-[2-(4-氯苯基)-1-乙氧基乙烯基]肼甲酸酯(5)与丙二酸肼或氰乙肼反应得到了相应的1,2,4-三氮唑基氨基甲酸酯衍生物(6或9);然后这些化合物的水解反应形成了3-[4-氨基-5-(4-氯苯甲基)-4H-1,2,4-三氮唑-3-基]甲基}-5-(4-氯苯甲基)-4H-1,2,4-三氮唑-4-胺(7)和[4-氨基-5-(4-氯苯甲基)-4H-1,2,4-三氮唑-3-基]乙腈(10)。从化合物7和10与水杨醛(8)或2,6-二氯苯甲醛(12)反应中合成了Schiff碱衍生物3-(4-氯苯甲基)-5-[5-(4-氯苯甲基)-4-[(2-羟基苯基-亚甲基)氨基]-4H-1,2,4-三氮唑-3-基]甲基}-N-(2-羟基苯基亚甲基)-4H-1,2,4-三氮唑-4-胺(8)和(5-(4-氯苯甲基)-4-[(2,6-二氯苯基)亚甲基]氨基}-4H-1,2,4-三氮唑-3-基)乙腈(12)。将化合物5或10与硫半脲反应生成了5-[4-氨基-5-(4-氯苯甲基)-4H-1,2,4-三氮唑-3-基]甲基}-1,3,4-噻二唑-2-胺(11)。所有新合成的化合物都进行了抗微生物活性筛选,结果发现具有良好或中等的抗微生物活性。