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.
Pentafluorophenylammonium Triflate (PFPAT): An Efficient, Practical, and Cost-Effective Catalyst for One-Pot Condensation of β-Naphthol, Aldehydes and Cyclic 1,3-Dicarbonyl Compounds
作者:Samad Khaksar、Nosratollah Behzadi
DOI:10.2174/138620712803901153
日期:2012.11.7
A pentafluorophenylammonium triflate (PFPAT) catalyst (10 mol%) efficiently promoted one-pot condensation of β-naphthol, aldehydes, and cyclic 1,3-dicarbonyl compounds in good to excellent yield under mild reaction conditions. These catalytic condensations have advantages from the viewpoint of green chemistry. PFPAT organocatalyst is air-stable, cost-effective, easy to handle, and easily removed from
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
Thiamine hydrochloride as a promoter for the efficient and green synthesis of 12-aryl-8,9,10,12 tetrahydrobenzoxanthene-11-one derivatives in aqueous micellar medium
作者:Shahin Fatma、Pravin K. Singh、Preyas Ankit、Shireen、Mandavi Singh、J. Singh
DOI:10.1016/j.tetlet.2013.09.125
日期:2013.12
An environmentally benign, three-component, one-pot integrated chemical process has been developed for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzoxanthene-11-one by nucleophilic addition reaction between aldehyde and beta-naphthol followed by Michael addition of dimedone, catalyzed by thiamine hydrochloride in aqueous micellar medium with excellent yield. Simple reaction conditions, no requirement of chromatographic separation, short reaction time, ease of isolation, use of inexpensive, easily recoverable and reusable catalyst makes this protocol very interesting from an economic and environmental perspective. (C) 2013 Elsevier Ltd. All rights reserved.
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.