Synthesis of new oxindole derivatives containing benzothiazole and thiazolidinone moieties using nano silica-bonded 5-n-propyl-octahydro-pyrimido[1,2-a]azepinium chloride (NSB-DBU) as catalyst
作者:Robabeh BAHARFAR、Narges SHARIATI
DOI:10.3906/kim-1408-26
日期:——
A facile one-pot synthesis of novel oxindole derivatives bearing benzothiazolylmethyl-2-thioxothiazolidin-4-one was accomplished via one-pot reaction of 5-oxoindolinylidene rhodanine-3-acetic acid derivatives, 2-aminothiophenol, and triphenyl phosphite in the presence of tetrabutylammonium bromide (TBAB) and nano silica-bonded 5-n-propyl-octahydro-pyrimido[1,2-a]azepinium chloride (NSB-DBU) as heterogeneous reusable nanocatalyst. The target compounds were obtained in excellent yields (85%--92%) and short reaction times under fairly mild reaction conditions.
通过 5-氧代吲哚亚基罗丹宁-3-乙酸衍生物与 2-氨基噻吩酚和亚磷酸三苯酯在四丁基溴化铵(TBAB)和纳米二氧化硅键合的 5-正丙基八氢噻唑-4-酮的一锅反应,简便地合成了含有苯并噻唑甲基-2-硫酮噻唑啉-4-酮的新型氧化吲哚衍生物、 在四丁基溴化铵(TBAB)和纳米二氧化硅键合的 5-正丙基八氢嘧啶并[1,2-a]氮杂环庚烷氯化物(NSB-DBU)作为异相可重复使用纳米催化剂的存在下,2-氨基苯硫酚和亚磷酸三苯酯发生了一锅反应。在相当温和的反应条件下,目标化合物的产率极高(85%-92%),反应时间极短。