Click 1,4-regioselective synthesis, characterization, and antimicrobial screening of novel 1,2,3-triazoles tethering fluorinated 1,2,4-triazole and lipophilic side chain
作者:Nadjet Rezki、Mariem Mohammed Mayaba、Fawzia Faleh Al-blewi、Mohamed Reda Aouad、El Sayed Helmi El Ashry
DOI:10.1007/s11164-016-2679-4
日期:2017.2
propargylation was carried out in presence of sodium bicarbonate, a mixture of S , N 4- ( 24 ) and S , N 2-bis(propargylated) triazoles ( 25 ) was obtained in 85 % overall yield. The click 1,3-dipolar cycloaddition reaction of the mono- ( 7 , 8 ) and/or bis(propargylated)-1,2,4-triazoles ( 24 ) with a variety of long-chain alkyl azides, conducted in t -BuOH:H2O (10:1) in presence of sodium ascorbate and
在三乙胺作为催化剂的情况下,用一或两当量的炔丙基溴,将5-(4-氟苯基)-2,4-二氢-1,2,4-三唑-3-硫酮( 3 )进行碱催化的烷基化 反应硫代炔丙基化的1,2,4-三唑 7的 收率为90%。在相同的反应条件下,产生4-乙基-5-(4-氟苯基)-3-(丙-2-炔-1-基硫基)-1,2,4-三唑( 8 )。相反,当在碳酸氢钠存在下进行炔丙基化时,则为 S , N 4-( 24 )和 S , N 2-双(炔丙基)三唑的混合物 ( 25 获得的总产率为85%。所述单- (的点击1,3-偶极环加成反应 7 , 8 )和/或双(propargylated)-1,2,4-三唑( 24 具有多种长链烷基叠氮化物的,在实施) 吨 -丁醇:H 2 O(10:1)中的抗坏血酸钠和铜(II)在室温下硫酸,得到区域选择性的1,4-二取代的单- (存在 14 - 18 )和双(1,2,3-三唑)衍生物( 26