• Bulletin of the Korean Chemical Society
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• 제17권10호
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• pp.892-899
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• 1996

In order to elucidate the effect of alkoxy substituent in thexylborane and hence establish their usefulness as hydroborating agent, reactions of alkenes and alkynes with thexylalkoxyborane (ThxBHOR; R=Et, i-Pr, i-Bu, sec-Bu, t-Bu, Ph) were investigated in detail. The reagents readily hydroborated alkenes and alkynes of various structural types at 25 ℃ in excellent regioselectivity. The selectivity increases consistently with increasing steric size of alkoxy substituent. Especially, the selectivity achieved by the sec-butoxy derivative is comparable to that previously achieved by thexylhaloborane-methyl sulfide (ThxBHX·SMe2), the most selective hydroborating agent known.

• Bulletin of the Korean Chemical Society
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• 제28권12호
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• pp.2139-2152
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• 2007

Ruthenium complex-catalyzed reactions often require highly qualified tuning of reaction conditions with substrates to attain high yield and selectivity of the products. In this review, our strategies for achieving characteristic ruthenium complex-catalyzed co-oligomerization of different alkenes are disclosed: 1) The codimerization of 2-norbornenes with acrylic compounds by new ruthenium catalyst systems of RuCl3(tpy)/Zn [tpy = 2,2':6',2''-terpyridine] or [RuCl2(η6-C6H6)]2/Zn in alcohols, 2) A novel synthesis of 2-alkylidenetetrahydrofurans from dihydrofurans and acrylates by zerovalent ruthenium catalysts, such as Ru(η4-cod)(η6-cot) [cod = 1,5-cyclooctadiene, cot = 1,3,5-cyclooctatriene] and Ru(η6-cot)(η2-dmfm)2 [dmfm = dimethyl fumarate], 3) Regio- and stereoselective synthesis of enamides by Ru(η6-cot)(η2-dmfm)2-catalyzed codimerization of N-vinylamides with alkenes, and 4) Unusual head-to-head dimerization of styrenes and linear codimerization of styrenes with ethylene by Ru(η6-cot)(η2-dmfm)2 catalyst in the presence of primary alcohols.

• 대한화학회지
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• 제54권1호
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• pp.27-37
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• 2010

1,1'-Bis(dimethylhydrosilyl)ferrocene과 alkynes의 반응에서($C_2H_4$)Pt$(PPh_3)_2$ 촉매경우는 monohydrosilylation과 dihydrosilylation된 비고리화합물의 혼합물이 주로 생성되었고, Ni$(PEt_3)_4$ 촉매 경우는 monohydrosilylation 생성물 또는 dihydrosilylation 생성물만 얻어지는 선택적인 반응을 하였다. 그리고 Alkenes의 반응에서도 monohydrosilylation된 화합물을 얻었다.

• Bulletin of the Korean Chemical Society
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• 제26권6호
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• pp.887-891
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• 2005

Novel nickel catalyst deposited on nanoporous carbon was found to be an efficient catalyst for the epoxidation of simple alkenes with $O_2$ and isobutyraldehyde under mild conditions. Alkenes exhibited different reactivities towards Ni-catalyst and epoxidation with stilbene proceeds stereospecifically. This may be rationalized with the mechanism involving coordinated acylperoxy radical intermediate. Nickel contents depend on the preparative methods and the KNI-3 catalyst, which was synthesized by wet impregnation of $Ni(NO_3)_2$ into nanoporous carbon, shows the highest activity. The activity of the catalyst is well correlated with contents of nickel. Recycled catalysts suffer considerable loss of activity due to leaching of catalytic active species, nickel.

• Bulletin of the Korean Chemical Society
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• 제23권1호
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• pp.157-159
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• 2002

• Journal of Photoscience
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• 제10권1호
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• pp.175-180
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• 2003

Zeolite, Nafion membranes and vesicles were used as microreactors to control the pathway of photosensitized oxidation of alkenes and remarkable selectivity was achieved.

• Bulletin of the Korean Chemical Society
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• 제26권1호
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• pp.97-102
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• 2005

The addition reactions of $\alpha$,$\alpha$-difluoroiodomethyl n-butyl ketone, α,α-difluoroiodomethyl cyclohexyl ketone, or $\alpha$,$\alpha$-difluoroiodomethyl phenyl ketone to alkenes were successfully accomplished in good yields in the presence of copper powder. The reaction was also applicable to alkenes containing a variety of functional groups such as ester, trimethylsilyl, or ether group. Acetonitrile was determined to be the best solvent in the present study and the reaction was performed at 55 ${^{\circ}C}$ for 15-22 h. This reaction provides a new, efficient and general method for the synthesis of $\alpha$,$\alpha$-difluoro functionalized ketones.

• 대한화학회지
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• 제32권1호
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• pp.79-79
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• 1988

• Bulletin of the Korean Chemical Society
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• 제16권2호
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• pp.86-88
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• 1995

• Bulletin of the Korean Chemical Society
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• 제17권11호
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• pp.1082-1085
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• 1996