Efficient synthesis of bis(indolyl)methanes, bispyrazoles and biscoumarins using 4-sulfophthalic acid
作者:Hoda Banari、Hamzeh Kiyani、Alireza Pourali
DOI:10.1007/s11164-016-2720-7
日期:2017.3
H2O has been effectively catalyzed the synthesis of a series of biologically relevant bis(indolyl)methanes by the electrophilic substitution of indole derivatives on aldehyde compounds and 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1 H -pyrazol-5-ol)s by condensing 5-methyl-2-phenyl-2,4-dihydro-3 H -pyrazol-3-one with various aldehydes under aqua conditions at room temperature. 3,3′-(Arylmethylene)-
H 2 O中50 wt%的4-磺基邻苯二甲酸(4-H 3 SPA)溶液已通过亲电取代醛化合物和4,4上的吲哚衍生物,有效催化了一系列生物相关的双(吲哚基)甲烷的合成通过缩合5-甲基-2-苯基-2,4-二氢-3 H- 吡唑-3-酮来合成'-(芳基亚甲基)-双(3-甲基-1-苯基-1 H- 吡唑-5-醇)s 在室温下于水条件下与各种醛混合。3,3'-(芳亚甲基)-双-4-羟基香豆素也已在0.1 mL(0.262 mmol)4-H 3 SPA溶液在H 2中浓度为50 wt%的情况下合成在80°C下为O。该过程很简单,并且预期的双杂环化合物以良好至极好的收率被分离出来。本协议具有以下优点:方便,反应条件温和,生态友好且不使用有害有机溶剂。