• Bulletin of the Korean Chemical Society
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• 제33권4호
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• pp.1154-1158
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• 2012

A room-temperature ionic liquid (RTIL) derived from 1,4-diazabicyclo[2.2.2]octane (DABCO) consisting of tetrafluoroborate anion, 1-butyl-4-(4-sulfonylbutyl)-1,4-diazoniabicyclo[2.2.2]octane hydrogen sulfate tetrafluoroborate ($[C_4DABCOC_4SO_3H][BF_4][HSO_4]$) was synthesized and catalytically evaluated in the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes by cyclocondensation reaction of ${\beta}$-naphthol and aryl aldehydes. This novel RTIL with an acidic $SO_3H$ group showed high catalytic activity with good to excellent yields of the desired products in short reaction times. Moreover, the catalyst could be recovered and reused at least three times with only slight reduction in its catalytic activity.

• Bulletin of the Korean Chemical Society
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• 제32권7호
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• pp.2311-2315
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• 2011

Alumina supported polyphosphoric acid (PPA/$Al_2O_3$) was successfully prepared by impregnation of alumina support by polyphosphoric acid and characterized using FT-IR spectroscopy, the $N_2$ adsorption/desorption analysis (BET), thermal analysis (TG/DTG), and X-ray diffraction (XRD) techniques. The catalytic behavior of this new solid acid supported heterogeneous catalyst was checked in the synthesis of 14-aryl-14H-dibenzo[a, j]xanthenes by cyclocondensation reaction of ${\beta}$-naphthol and aryl aldehydes under solvent-free conditions. The results showed that the novel catalyst has high activity and the desired products were obtained in very short reaction times with high yields. Moreover, the catalyst can be easily recovered by filtration and reused at least three times with only slight reduction in its catalytic activity.

• 대한화학회지
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• 제46권6호
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• pp.541-544
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• 2002

높은 순도의 14-알킬-14H-다이벤조[a,j]잔텐의 합성법과 AM1 SCF MO 계산을 보고하였다.

• Bulletin of the Korean Chemical Society
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• 제32권1호
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• pp.35-36
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• 2011

• 대한화학회지
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• 제53권4호
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• pp.415-421
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• 2009

수용액에서 다양한 알데히드 5, 5-dimethyl-1, 3-cyclohexanedione을 이용한 1, 8-Dioxo-octahydroxanthene 유도체의 편리하고 실용적인 합성이 촉매인 폴리에틸렌 글리콜(PEG)하에서 성공적으로 수행되었다. 간단한 work-up, 깨끗한 생성물, 높은 수율, 친환경적인 용매인 물의 사용은 이 방법의 특색이다.