Brønsted acidic ionic liquids: Green, efficient and reusable catalyst for synthesis of fluorinated spiro [indole-thiazinones/thiazolidinones] as antihistamic agents
作者:Kapil Arya、Diwan Singh Rawat、Anshu Dandia、Hiroaki Sasai
DOI:10.1016/j.jfluchem.2012.03.003
日期:2012.5
and 1-butyl-3-methylimidazolium and inorganic anions such as BF4−, PF6− and PTSA− used as catalysts and reaction medium for synthesis of fluorinated spiro[3H-indole-3,2′-tetrahydro-1,3-thiazine]-2,4′(1H)-diones (4a-f), fluorinated spiro[3H-indole-3,2′-thiazolidine]-2,4′ (1H)-diones (5a-f) in 90–97% yield by one-pot environmentally benign microwave induced technique. Synthesized compounds have been evaluated
布朗斯台德含有基于氮的有机阳离子1-甲基咪唑和1-丁基-3-甲基咪唑鎓和无机阴离子如BF酸性离子液体4 -,PF 6 -和PTSA -用作催化剂和反应介质为氟化螺合成[3H-吲哚-3,2'-四氢-1,3-噻嗪] -2,4'(1H)-二酮(4a-f),氟化螺[3H-吲哚-3,2'-噻唑烷] -2,4' (1H)-二酮(5a-f)通过一锅环境友好的微波诱导技术以90-97%的产率收率。已经评估了合成的化合物抑制组胺诱导的豚鼠回肠收缩的能力。p A 2的测量 值表明报道的化合物显示出H1拮抗作用。