منابع مشابه
DIBAL-H mediated triple and quadruple debenzylations of perbenzylated cyclodextrins.
Diisobutylaluminium hydride (DIBAL-H) mediated reductive removal of benzyl groups was investigated for perbenzylated alpha-, beta- and gamma-cyclodextrins using DIBAL-H in hexane as the reagent. It was found that under the new conditions, the debenzylation can be better controlled to provide sequentially tri- and tetra-debenzylated products in moderate yields and in a regioselective manner. In ...
متن کاملLactone-free ginkgolides via regioselective DIBAL-H reduction.
The lactone rings of ginkgolide A are converted into corresponding tetrahydrofuran moieties via DIBAL-H reduction followed by deoxygenation of the formed lactols with Et3SiH-BF3.Et2O to produce a series of lactone-free ginkgolides.
متن کاملBorenium cations derived from BODIPY dyes.
Fluoride abstraction from a BODIPY dye gives a well defined borenium ion which can be converted to a borenium hydride via treatment with DIBAL-H.
متن کاملRegioselective Intermolecular [2 + 2]-Cycloaddition of α-Iodo-Unsaturated Ketones Promoted by Diisobutylaluminum Hydride.
The development of intermolecular [2 + 2]-cycloaddition of α-iodo-unsaturated ketones in the presence of diisobutylaluminum hydride (Dibal-H) is reported to produce various trispirocyclic derivatives containing a cyclobutane ring. This sequential lactonization/[2 + 2]-cycloaddition proceeds in high regioselectivity under mild conditions.
متن کاملImine hydrogenation by alkylaluminum catalysts.
Di-isobutylaluminum hydride and tri-iso-butylaluminum (DIBAL 1, TIBAL 2) are shown to be efficient hydrogenation catalysts for a variety of imines at 100 °C and 100 atm of H2, operating via a hydroalumination/hydrogenolysis mechanism.
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ژورنال
عنوان ژورنال: Synlett
سال: 2002
ISSN: 0936-5214,1437-2096
DOI: 10.1055/s-2002-19347