The invention relates to organic compounds which have interesting pharmaceutical properties. In particular, the compounds are useful in the treatment and/or prevention of infections such as those caused by
Plasmodium falciparum, Plasmodium vivax, Plasmodium malariae, Plasmodium ovale, Trypanosoma cruzi
and parasites of the
Leishmania
genus such as, for example,
Leishmania donovani
. The invention also relates to pharmaceutical compositions containing the compounds, as well as processes for their preparation.
Synthesis of spiroindolone scaffolds by Pictet-Spengler spirocyclisation using β-cyclodextrin-SO3H as a recyclable catalyst
作者:Tukaram D. Urmode、Monali A. Dawange、Vaishali S. Shinde、Radhika S. Kusurkar
DOI:10.1016/j.tet.2017.05.089
日期:2017.7
A recyclablecatalyst, β-cyclodextrin-SO3H in aqueous medium was used effectively for the synthesis of spiroindolones (tetrahydrospiro-β-carbolines as well as tetrahydrospiro-γ-carbolines) in a Pictet-Spengler spirocyclisation. The products were obtained in good yield in an environmental friendly procedure.
Polymer‐Supported Phosphoric‐Acid Catalysed Enantioselective Pictet‐Spengler Cyclisation for the Synthesis of Quaternary Tryptolines in Batch/Continuous Flow
作者:Moreshwar B. Chaudhari、Prachi Gupta、Patricia Llanes、Miquel A. Pericàs
DOI:10.1002/adsc.202201275
日期:2023.2.21
the reaction has been demonstrated in continuous flow, with a residence time of only 24 minutes. The robust immobilized catalyst has been recycled and reused multiple times in batch and flow. The synthesis of the chiral precursors of Tadalafil, the Iboga-type alkaloid (+)-Tabertinggine and antimalarial spiroindolinones has been achieved in batch and continuous-flow.
Cysteine Catalyzed Pictet-Spengler Reaction: a Convenient and Mild Method for Synthesis of Spiroindolones
作者:Xiao-Ting Zhao、Wen-Dian Li、Fei-Yan Tao、Na Wang
DOI:10.1007/s10562-024-04698-8
日期:2024.8
Pictet-Spengler reaction catalyzed by amino acids has been rarely described. Herein, we report the cysteine-catalyzed Pictet-Spengler reaction between tryptamine and isatin under metal-free and convenient conditions. The catalytic performance of amino acid was optimized through screening reaction conditions such as time, temperature, solvent, molar ratio and catalyst amount and a series of spiroindolones