http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
텍실에톡시보란에 의한 대표적인 작용기를 가진 유기화합물의 선택환원
차진순 嶺南大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.16 No.-
The approximate rates and stoicchiometries of the reaction of thexylethoxyborane (ThxBHOEt) with selected organic compounds containing representative functional groups were examined in order to define the characteristics of the reagent for selective reductions. The reducing ability ThxBHOEt was also compared with those of the parent thxylborane (ThxBH₂) and appears to be milder than ThxBH₂. ThxBHOEt shows a unique reducing characteristics. Thus, 1-hexanol and ?-hexylamine evolved hydrogen slowly. whereas 1-hexanethiol was absolutely stable. ThxBHOEt reduced aldehydes and ketones slowly to the corresponding alcohols. Carboxylic acids and acid chlorides were converted to the corresponding aldehydes. Finally, nitriles, aromatic ester, epoxides, and sulfides were essentially inert to ThxBHOEt.
차진순 嶺南大學校基礎科學硏究所 2001 基礎科學硏究 Vol.21 No.-
A new class of reducing agent, triisopropoxyborane is readily prepared by treating three equivalents of isopropyl alcohol with borane solution(BH_3-THF) at 0 ℃ or 25 ℃ and its reducing characteristics toward selected organic compounds containing representative functional groups was examined. By the use of triisopropoxyborane, ketones, aldehydes as well as epoxides could be reduced satisfactorily, the acetone formed being removed from the equilibrium mixture by stream of dry nitrogen. This mild and specific reduction method agent may occur via the Meerwein-Ponndorf-Verley reduction. Most aliphatic aldehydes and ketones were reduced rapidly to the corresponding alcohols. In addition, aromatic epoxides examined were readily reduced to the corresponding primary alcohols. Triisopropoxyborane provides a highly convenient and selective method for converting a wide variety of organic functionalities to the useful other organic functions.
NaBH₄와 PCC를 이용하여 환원-산화법에 의한 카르복시산으로부터 알데히드 합성에 관한 연구
이재철,차진순 嶺南大學校基礎科學硏究所 1999 基礎科學硏究 Vol.19 No.-
A new convinent conversion of carboxylic acids into the corresponding aldehydes by utilizing sodium borohydride has been devised the procedure involves the reaction of carboxylic acids with sodium borohydride to form the acyloxyborohydride intermediate, followed by the treatment with dimethyl sulfate to be converted into trialkoxybororine. 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.
차진순 조선대학교 기초과학연구원 2012 조선자연과학논문집 Vol.5 No.2
Some recommended procedures for obtaining aldehydes from carboxylic acid itself and its derivatives, which have been developed in relatively recent years, are summarized. Such procedures should provide a new practical methodology to synthesize the desired aldehyde products in high yields.
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.
Diisobutylchloroalane 에 의한 카르보닐 화합물의 선택환원
車震淳 嶺南大學校 基礎科學硏究所 1994 基礎科學硏究 Vol.14 No.-
Conjugated aldehydes and ketones are reduced rapidly and quantitatively to the corresponding allylic alcohols by diisobutylchloroalane in ether in excellent purities. Even cyclic enones, such as 2-cyclohexenone and 2-cyclopentenone, are reduced cleanly to the desired allylic alcohols without concomitant attack at the double bonds. What is more, chemoselective reduction of aldehydes to primary alcohols in the presence of ketones by diisobutylchloroalane affords an important methodology in organic synthesis.
트리스디에틸아미노수소화알루미늄 리튬에 의한 에스테르의 알데히드로의 부분환원
차진순 嶺南大學校 基礎科學硏究所 1991 基礎科學硏究 Vol.11 No.-
Both aliphatic and aromatic carboxylic esters are readily reduced to the corresponding aldehydes by lithium tris(diethylamino)aluminum hydride in tetrahydrofuran in high yields at -78℃.
2,2´-Biphenoxyborane의 수소화붕소첨가반응
서정법,이재철,차진순 嶺南大學校附設 基礎科學硏究所 1989 基礎科學硏究 Vol.9 No.-
2,2'-Biphenoxyborane(BPB), readily available from the reaction of 2,2'-biphenol with borane in THF, reacts more rapidly with alkynes than alkenes at room temperature, respectively, to give corresponding alkyl-and alkenyl-2,2'-biphenoxyboranes in high yield. These hydroboration proceed stereospecifically in a cis manner. Greater regioselectivity is realized in comparison with hydroborations with diborane itself. The alkyl-and alkenyl-2,2'-biphenoxyboranes undergo rapid hydrolysis with water to give the corresponding alkane-and alkeneboronic acids. The alkaline hydrogen peroxide oxidation of alkyl-and alkenyl-2,2'-biphenoxyboranes give the corresponding oxygenated products in high yields.