• 대한화학회지
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• 제61권3호
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• pp.125-128
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• 2017

• 대한화학회지
• /
• 제38권1호
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• pp.80-86
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• 1994

Bruceantin유사체 전합성의 중요한 중간체인 ethyl $({\pm})$-8-oxo-10-oxa-l'H-spiro[1, 3]dioxolane-4,4'-tricyclo [9.2.1.0 1,6]dodec-6-ene-9-carboxylate (7)의 합성경로를 개발하였다. 시작물질로서 ethyl 2-cyclohexanonecarboxylate and methyl vinyl ketone을 사용하여, Robinson annulation, allylic oxidation등을 응용하였으며, regiospecific acylation and the formation of epoxy methano bridge 형성 반응 등이 연구되었다. Actalone (3)의 ketalization 반응에서 새로운 decarboethoxylation 반응을 발견하였으며, 이 반응을 이용하여 3차 알코올과 엔온을 가지고 있는 4,4a,5,6,7,8-Hexahydro-4a-hydroxy-2(3H)naphthalenone (14)를 합성하였다.

• Advances in nano research
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• 제12권1호
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• pp.49-63
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• 2022

Nanocatalysts are usually used in the synthesis of petrochemical products, fine chemicals, biofuel production, and automotive exhaust catalysis. Due to high activity and stability, recyclability, and cost-effectiveness, nanocatalysts are a key area in green chemistry. On the other hand, water as a common by-product or undesired element in a range of nanocatalyzed processes may be promoting the deactivation of catalytic systems. The advancement in the field of hydrophobicity in nanocatalysis could relatively solves these problems and improves the efficiency and recyclability of nanocatalysts. Some recent developments in the synthesis of novel nanocatalysts with tunable hydrophilic-hydrophobic character have been reviewed in this article and followed by highlighting their use in catalyzing several processes such as glycerolysis, Fenton, oxidation, reduction, ketalization, and hydrodesulfurization. Zeolites, carbon materials, modified silicas, surfactant-ligands, and polymers are the basic components in the controlling hydrophobicity of new nanocatalysts. Various characterization methods such as N2 adsorption-desorption, scanning and transmission electron microscopy, and contact angle measurement are critical in the understanding of hydrophobicity of materials. Also, in this review, it has been shown that how the hydrophobicity of nanocatalyst is affected by its structure, textural properties, and surface acidity, and discuss the important factors in designing catalysts with high efficiency and recyclability. It is useful for chemists and chemical engineers who are concerned with designing novel types of nanocatalysts with high activity and recyclability for environmentally friendly applications.