Proline confined FAU zeolite: heterogeneous hybrid catalyst for the synthesis of spiroheterocycles via a Mannich type reaction
作者:Kapil Arya、U. Chinna Rajesh、Diwan Singh Rawat
DOI:10.1039/c2gc35822k
日期:——
A novel L-proline confined FAU zeolite catalyst system has been developed by confinement of L-proline in faujasite zeolite and its catalytic activity has been tested in the aqueous mediated synthesis of novel 1′,3′-di-(4-methylphenyl)-2′,3′,4′,6′-tetrahydro-1′H-spiro[indoline-3,5′-pyrimidin]-2-one (4a) and 1′,3′-di-(4-methylphenyl)-2′,3′,4′,6′-tetrahydro-1′H-spiro[indene-2,5′-pyrimidin]-1(3H)-one (4d) for the first time via the one-pot three-component condensation of lactams/cyclic ketones, amines and aqueous formaldehyde. The recyclability of the novel catalyst system was studied, which resulted in no loss of catalytic activity up to five cycles.
在水介导合成新型 1′,3′-二(4-甲基苯基)-2′,3′,4′,6′-四氢-1′H-螺[吲哚啉-3、5′-嘧啶]-2-酮(4a)和 1′,3′-二(4-甲基苯基)-2′,3′,4′,6′-四氢-1′H-螺[吲哚啉-2、5′-嘧啶]-1(3H)-酮 (4d)。对新型催化剂体系的可循环性进行了研究,结果表明催化活性在五个循环周期内均未丧失。