Protonated trititanate nanotubes: an efficient catalyst for one-pot three-component coupling of benzothiazole amines, heterocyclic aldehydes, and dialkyl/diaryl phosphites with a greener perspective
Nano-size catalysts of TiO2, ZnO, CuO, and protonated trititanate nanotubes (H2Ti3O7) have been investigated for the one-pot three component synthesis of novel α-aminophosphonates from benzothiazole amines, heteroaldehydes, and dialkyl/diaryl phosphites via Kabachnik–Fieldsreaction. This methodology provides a new and convenient approach to multicomponent reaction and the H2Ti3O7 nanotubes catalyst is recyclable
研究了TiO 2,ZnO,CuO和质子化三钛酸盐纳米管(H 2 Ti 3 O 7)的纳米尺寸催化剂,用于由苯并噻唑胺,杂醛和二烷基/二芳基化合物一锅三组分合成新型α-氨基膦酸酯。通过Kabachnik-Fields反应生成亚磷酸酯。这种方法为多组分反应提供了一种新的便捷方法,H 2 Ti 3 O 7纳米管催化剂可循环使用多达七个循环。
Camphor-derived thioureas: Synthesis and application in asymmetric Kabachnik-Fields reaction
Abstract A series of camphor-derived thiourea organocatalysts 3a–f were designed and synthesized from (1 R ,3 S )-camphoric acid 1 and applied to the one-potthree-component Kabachnik–Fields reaction. Catalyst 3c was found to be an efficientorganocatalyst for the reaction of 2-cyclopropylpyrimidin-4-carbaldehyde 4 , various amines 5, and diphenylphosphite 6 to yield the corresponding enantioselective