Bis-amino methylation for the synthesis of spiro-fused piperidines using iron(III) trifluroacetate in aqueous micellar medium
作者:Trushant Lohar、Sanjay Jadhav、Arjun Kumbhar、Ananda Mane、Rajashri Salunkhe
DOI:10.1007/s11164-015-2363-0
日期:2016.6
An environmentally benign, multicomponent integrated chemical process has been developed for the synthesis of 3,5-dispirosubstituted piperidines by cyclo-condensation reaction of amines, formaldehyde, and dimedone using iron(III) trifluroacetate [Fe(F3CCO2)3] Lewis acid in aqueous micellar medium at ambient temperature (25–30 °C). The heterogeneous solid acid catalyst conveniently promotes this double amino methylation reaction in which six molecules condense in one pot to form six new covalent bonds. The synthesized 3,5-dispirosubstituted piperidines have been screened for their in vitro antibacterial activity using agar well method. Many of these compounds showed satisfactory antibacterial activity as compared to standard drugs against all the bacteria tested.
利用三氟乙酸铁(III) [Fe(F3CCO2)3]路易斯酸在水性胶束介质中,在环境温度(25-30 ℃)下通过胺、甲醛和二甲酮的环缩合反应合成 3,5-二取代的哌啶类化合物,开发了一种对环境无害的多组分集成化学工艺。这种异质固体酸催化剂能方便地促进这种双氨基甲基化反应,在反应中,六个分子在一个罐中凝结成六个新的共价键。采用琼脂井法对合成的 3,5-二取代哌啶进行了体外抗菌活性筛选。与标准药物相比,这些化合物中的许多对所有受试细菌都显示出令人满意的抗菌活性。