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Jin Soon Cha, Seung Jin Park 조선대학교 기초과학연구원 2009 조선자연과학논문집 Vol.2 No.3
The new MPV-type reagent, Al-fluorodiisobutylalane (DIBAF), has been prepared and their reducing characteristics in the reduction of selected organic compounds containing representative functional groups have been examined in order to find out a new reducing system with unique applicability in organic synthesis. In general, the reagent is extremely mild, showing only reactivity toward aldehydes, ketones, and epoxides. The reagent achives a clean 1,2-reduction of enals to the corresponding allylic alcohols in a 100% purity, but shows no reactivity toward enones. The reagent also shows an excellent regioselective cleavage of substituted epoxides. In addition, DIBAF produces the thermodynamically more stable alcohol epimer in high stereoselectivity in the reduction of cyclic ketones
1-Pyrrolyldiisobutylalane에 의한 유기화합물의 선택환원
차진순,이광우 嶺南大學校基礎科學硏究所 2002 基礎科學硏究 Vol.22 No.-
The reducing characteristics of 1-pyrrolyldiisobutylalane (DIBAPyr) as a selective reducing agent in the reduction of organic compounds have been studied systematically. Aldehydes and ketones are rapidly reduced to the corresponding alcohols by DIBAPyr in ether solution with excellent purity. Epoxides and acid chlorides are converted to the corresponding alcohols. Finally, carboxylic acids and alkenes are essentially inert to DIBAPyr.
차진순,이재철 嶺南大學校基礎科學硏究所 1999 基礎科學硏究 Vol.19 No.-
The reducing characteristics of diisobutyldiphenylaminoalane (DIBANPh_2) as selective reducing agent in the reduction of carbonyl compounds, have been studie systematically. Aldehydes are smoothly reduced to the corresponding alcohols by BIBANPh_2 i ether solution.
BH₃와 PCC를 이용하여 환원-산화법에 의한 카르복시산 염으로부터 알데히드 합성에 관한 연구
차진순, 이재철 영남대학교 기초과학연구소 2000 基礎科學硏究 Vol.20 No.-
A new convinent conversion of carboxylic acid salts into the corresponding aldehydes by utilizing borane has been devised : the procedure involves the reaction of carboxylic acid salts with borane to form the acyloxyborohydride intermediate, followed by the treatment with dimethyl sulfate to be converted into trialkoxyboroxine. Finally, the boroxine intermediate is converted to aldehydes by oxidation with pyridinium chlorochromate or pyridinium dichromate. The yields of aldehydes by this procedure are very excellent. This method provides one of the most economical procedures reported in the literature.
차경환,김의진,이순원 성균관대학교 기초과학연구소 1993 論文集 Vol.44 No.2
Zr(acac)Cl_3(THF) 및 Zr(acac)_2Cl_2(acac=acetylactate, CH_3COCHCOCH_3^1) 화합물이 [Li(THF)_x][PhNN=NNPh], Ⅰ, 리간드와 반응하여 각각 Zr(=NPh)(acac)CI(THF), Ⅱ, 및 Zr(=NPh)(acac)_2, Ⅲ, 착화합물을 생성하였다. 이들을 ^1H-NMR, FTIR 스펙트럼으로 분석하였다. Reactions between Zr(acac)CI_3(THF) and Zr(acac)_2Cl_2(acac=CH_3 COCHCOCH_3^1) with [Li(THF)_x][PhNN=NNPh], Ⅰ, led to Zr(=NPh)(acac) Cl(THF), Ⅱ, and Zr(=NPh)(acac)_2, Ⅲ, respectively. They have been characterized by ^1H-NMR and FTIR spectroscopy.
디이소부틸수소화알루미늄=메틸설피드 착물에 의한 니트릴의 알데히드로의 환원
車震淳 嶺南大學校 基礎科學硏究所 1993 基礎科學硏究 Vol.13 No.-
A systematic study of the partial reduction of nitriles to the corresponding aldehydes with diisobutylaluminum hydride-dimethyl sulfide complex under practical conditions has been carried out. The yields of aldehydes are good in the aliphatic and aromatic series.
Diisobutyldiisobutylaminoalane에 의한 유기작용기의 선택환원
차진순,이광우 嶺南大學校 基礎科學 硏究所 1998 基礎科學硏究 Vol.18 No.-
The reducing characteristics of diisobutyldiisobutylaminoalane (DIBAN Bu₂) as a chemoselective reducing agent in the reduction of carbony1 compounds, have been studied systematically. Aldehydes are smoothly reduced to the corresponding alcohols by diisobutyldiisobutylaminoalane in ether solution with excellent purity.
Diisobutyldiethylaminoalane에 의한 카르보닐 화합물의 선택환원
차진순 嶺南大學校 基礎科學硏究所 1995 基礎科學硏究 Vol.15 No.-
The reducing characteristics of diisobutyldiethylaminoalane, as a chemoselective reducing agent in the reduction of an equimolar amount of different carbonyl compounds, have been examined systematically. Aldehydes are smoothly reduced to alcohols. Furthermore, conjugated aldehydes and ketones are reduced to the corresponding allylic alcohols quantitatively by diisobutyldiethylaminoalane in ether solution with excellent purity.
트리알콕시수소화붕소 리튬의 합성과 그들의 안정성 및 화학
車震淳,金進億,李在哲 嶺南大學校附設 基礎科學硏究所 1984 基礎科學硏究 Vol.4 No.-
The reaction in tetrahydrofuran of potassium trialkoxyborohydrides with lithium chloride was examined in detail to establish the generality of this synthesis of the corresponding lithium trialkoxyborohydrides and the stability of these lithium derivatives in tetraydrofuran was examined using ?? NMR spectroscopy. For R=i-Pr, the lithium salt is very stable. However, R=s-Bu and t-Bu, with increasing steric requirement, the lithium derivatives are unstable and thus dissociated into (RO)BH₃- and (RO)₄B-. The stereoselectivity of lithium triisopropoxyborohydride (LIPBH) on the reduction of cyclic ketones was investigated and compared with that of the potassium derivative.