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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 55, Number 4
JKCSEZ 55(4)
August 20, 2011 

Polyaniline/SiO2 Catalyzed One-pot Mannich Reaction: An Efficient Synthesis
of β-amino Carbonyl Compounds

Polyaniline/SiO2를 이용한 one-pot Mannich 반응: β-amino carbonyl 화합물의
효율적인 합성
Ajeet A Yelwande, Balasaheb R Arbad, Machhindra K Lande*

Ajeet A Yelwande, Balasaheb R Arbad, Machhindra K Lande*
화학적인 산화반응, Polyaniline/SiO2, Mannich 반응, β-amino carbonyl 화합물 , Chemical oxidative method, Polyaniline/SiO2, Mannich reaction, β-amino carbonyl compounds
Polyaniline/SiO2 촉매를 이용하여, acetophenone, aromatic aldehydes와 aromatic amines을 에탄올 용매 속에서 반응 시켜서 다양한 various β-amino ketones을 one-pot mannich 반응을 수행하였으며, 이 반응을 위해 silica가 충진된 여러 가지 종류의 wt% polyaniline을 화학적인 산화방법에 의해 합성하였다. 합성한 촉매는 thermal analysis(TG-DTA), X-ray diffraction (XRD), scanning electron microscopy(SEM) energy dispersive spectroscopy(EDS), 및 Fourier transform infrared spectroscopy (FT-IR) 방법으로 확인하였으며, 촉매의 용매에 대한 안정도 UV-Visible spectroscopy로 측정하였다. Polyaniline/SiO2 촉매를 이용하는 합성 방법은높은 수율로 얻어지며, work up이 쉽고, 독성이 없으며, 쉽게 회수하여 재사용이 가능하다.

Polyaniline/SiO2 catalyzed one-pot mannich reaction of acetophenone, aromatic aldehydes and aromatic amines are carried out in ethanol to afford various β-amino ketones. The various wt% of polyaniline were supported on pure silica synthesized by using chemical oxidative method. The catalyst prepared has been characterized by means of thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS), and Fourier transform infrared spectroscopy (FT-IR). Solvent stability of catalyst was tested using UV-Visible spectroscopy. This protocol has several advantages such as high yield, simple work up procedure, non-toxic, clean, easy recovery and reusability of the catalyst.

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