A new strategy for the synthesis of benzoxanthenes catalyzed by proline triflate in water
作者:Jianjun Li、Lingmei Lu、Weike Su
DOI:10.1016/j.tetlet.2010.02.149
日期:2010.5
Catalyzed by proline triflate, benzoxanthenes were obtained in good yields from the condensation of naphthols, aldehydes, and 1,3-dicarbonyl compounds in water. A possible mechanism of this reaction is proposed.
AbstractA clean procedure for the synthesis of tetrahydrobenzo[c]xanthenes was established in the presence of a functional ionicliquid, 1-butyl-(4-dimethylamino)pyridinium hydroxide [BDMAP][OH]. The reaction was carried out via the one-pot multi-component condensation of aromatic aldehydes, cyclic 1,3-dicarbonyl compounds, and α-naphthol in aqueousmedia, to afford good to excellent yields ranging
摘要在功能性离子液体1-丁基-(4-二甲基氨基)吡啶鎓氢氧化物[BDMAP] [OH]存在下,建立了合成四氢苯并[ c ]黄嘌呤的清洁方法。该反应是通过在水性介质中一锅法将芳族醛,环状1,3-二羰基化合物和α-萘酚进行多组分缩合来实现的,在60-90范围内,产率从80%到85%不等。分钟 反应后,催化剂可以循环使用几次,而催化活性没有明显降低。 图形概要
A multicomponent, solvent-free, one-pot synthesis of benzoxanthenones catalyzed by HY zeolite: their anti-microbial and cell imaging studies
An atom-economical, multicomponent condensation of naphthols, aldehydes, and cyclic 1,3-dicarbonyl compounds catalyzed by HY zeolites under solvent-free conditions is reported. This ecofriendly protocol offers several advantages such as a green and cost-effective procedure with excellent yield, shorter reaction time, simpler work-up, recovery, and reusability of metal-free solid acid heterogeneous catalyst and tolerance of a wide range of functional groups. The biological studies such as in vitro anti-microbial activities of the prepared new compounds and cell imaging studies on K562 leukemia cell lines by selected benzoxanthenones are evaluated. (C) 2011 Elsevier Ltd. All rights reserved.