Selective Reduction of Organic Compounds with Al-Trifluoromethanesulfonyldiisobutylalane. Comparison of Its Reactivity with Al-Methanesulfonyldiisobutylalane

Title
Selective Reduction of Organic Compounds with Al-Trifluoromethanesulfonyldiisobutylalane. Comparison of Its Reactivity with Al-Methanesulfonyldiisobutylalane
Author(s)
차진순
Keywords
ALKYL-SUBSTITUTED EPOXIDES; MEERWEIN-PONNDORF-VERLEY; REGIOSELECTIVE RING-CLEAVAGE; BORON-TRIFLUORIDE; FUNCTIONAL-GROUPS; METAL REAGENTS; ALUMINUM
Issue Date
201101
Publisher
KOREAN CHEMICAL SOC
Citation
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.32, no.1, pp.219 - 224
Abstract
The new MPV type reagent, Al-trifluoromethanesulfonyldiisobutylalane (DIBAO(3)SCF(3)), has been prepared and its reducing characteristics in the reduction of selected organic compounds containing representative functional groups have been examined, and compared its reactivity with that of Al-methanesulfonyldiisobutylalane (DIBAO(3)SCH(3)) in order to understand the fluorine-substituent effect on its reactivity. In general, the reactivity of DIBAO(3)SCF(3) appears to be much higher than that of DIBAO(3)SCH(3), apparently due to the acidity increase by the electron-withdrawing fluorine-substituent. The reagent reduced aldehydes and ketones readily, but showed a perfect selectivity in the reduction of alpha,beta-unsaturated aldehydes and ketones to produce the corresponding allylic alcohols in an absolutely 100% purity. In addition, the reagent achieved the regioselective cleavage of phenyl- or/and alkyl-substituted epoxides to the less substituted alcohols in a perfect regioselectivity. Moreover, the reagent also showed an high stereoselectivity in the reduction of substituted cycloalkanones to produce the thermodynamically more stable alcohol epimers exclusively.
URI
http://hdl.handle.net/YU.REPOSITORY/25737http://dx.doi.org/10.5012/bkcs.2011.32.1.219
ISSN
0253-2964
Appears in Collections:
문과대학 > 중국언어문화학과 > Articles
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