Design and synthesis of novel quinoline derivatives bearing oxadiazole, isoxazoline, triazolothiadiazole, triazolothiadiazine, and piperazine moieties
作者:Zhiren Tang、Yang Peng、Fangming Liu
DOI:10.1002/jhet.3907
日期:2020.6
was synthesized. The key intermediate 4 , 4‐amino‐5‐[2‐(4‐phenylpiperazin‐1‐yl)quinolin‐3‐yl]‐4H ‐1,2,4‐triazole‐3‐thiol, was prepared using the ester 3 by a series of step. Reaction of 5 with various aromatic carboxylic acids or phenacyl bromides yielded 1,2,4‐triazolo[3,4‐b ][1,3,4]thiadiazoles 5a‐c and 1,2,4‐triazolo[3,4‐b ][1,3,4]thiadiazines 6a‐c , respectively. Moreover, compound 2 condensed with
从2-氯喹啉-3-甲醛中合成了一系列新的2,3-二取代喹啉衍生物。在反应顺序中,对乙酰苯胺进行环化以生成2-氯喹啉3-甲醛1,通过与4-苯基哌嗪在含DMF的反应将其转化为2-(4-苯基哌嗪-1-基)喹啉3-甲醛2。无水K 2 CO 3 ; 然后,化合物2在甲醇中被碘氧化,合成了2-(4-苯基哌嗪-1-基)喹啉-3-羧酸甲酯3。关键中间体4,4-氨基-5- [2-(4-苯基哌嗪-1-基)喹啉-3-基] -4- ħ -1,2,4-三唑-3-硫醇,用的是酯制备3通过一系列步骤。的反应5与各种芳族羧酸或苯甲酰甲基溴化物,得到1,2,4-三唑并[3,4- b ] [1,3,4]噻二唑5A-C和1,2,4-三唑并[3,4 b分别为[1,3,4]噻二嗪6a-c。此外,化合物2与邻苯二胺缩合得到2- [2-(4-苯基哌嗪-1-基)喹啉-3-基] -1 H-苯并咪唑7。在K 2 CO 3存在下7和2-氯甲基-5-芳基-1