Cheol Min Yoon

Chemoselective reduction of nitroaromatics to anilines using decaborane in methanol

Nitrobenzenes were chemoselectively reduced to the corresponding anilines using decaborane (B10H14) in the presence of Pd/C and two drops of acetic acid at reflux under nitrogen atmosphere in high yields.

An efficient protection of carbonyls and deprotection of acetals using decaborane

Carbonyls were efficiently converted to the corresponding dimethyl acetals at room temperature using trimethyl orthoformate and 1 mol% of decaborane under a nitrogen atmosphere. In turn, acetals were deprotected to the corresponding carbonyls using 1 mol% of decaborane in aqueous THF chemoselectively.

Reductive etherification of aromatic aldehydes with decaborane

Abstract Aromatic aldehydes were easily converted to the corresponding ethers in methanol or ethanol using decaborane at r.t. under nitrogen in high yields.

MILD AND EFFICIENT REDUCTION OF SULFOXIDES TO SULFIDES WITH BIS-(CYCLOPENTADIENYL)TITANIUM(IV) DICHLORIDE–INDIUM SYSTEM

ABSTRACT Cp2TiCl2/In system was found to be a new reagent for reducing various sulfoxides to the corresponding sulfides in good yields under mild and neutral conditions.

Reduction of ketones to alcohols using a decaborane/pyrrolidine/cerium(III) chloride system in methanol

Abstract Decaborane was found to be an effective agent for the chemoselective reduction of ketones to alcohols in the presence of pyrrolidine and cerium(III) chloride heptahydrate in methanol.

Amination of the Baylis–Hillman Acetates in Ethanol

Abstract Baylis–Hillman acetates in EtOH were substituted by various nitrogen nucleophiles to give the corresponding trisubstituted alkenes in high yields.

Facile Deoxygenation of Amine‐N‐oxides With CoCl2 · 6H2O–Indium System

Abstract CoCl2 · 6H2O/In system was found to be a new reagent for deoxygenation of various amine‐N‐oxides to the corresponding amines in good to excellent yields under sonication.

Indium mediated allylation of quinoline and isoquinoline activated by phenyl chloroformate

Quinoline and isoquinoline activated by phenyl chloroformate were allylated using indium and allyl bromides in THF at room temperature to give the corresponding allyldihydroquinoline and allyldihydroisoquinoline in good to high yields.

Homocoupling of Aryl Iodides and Bromides Using a Palladium/Indium Bimetallic System

Abstract Homocoupling of aryl iodides and bromides using catalytic amounts of palladium and stoichiometric amounts of indium proceeded smoothly to afford the corresponding biaryls in good to high yields.

Synthesis of pyrido[2,3-d]pyrimidines via palladium-catalyzed reaction of iodouracil with acetylenes

Abstract The reactions of iodouracils having a formamidine or acetamidine moiety 1 with various acetylenes 2 in DMF at 120°C using potassium carbonate and a catalytic amount of palladium acetate gave a mixture of pyrido[2,3- d ]pyrimidine derivatives in good to high yields. Addition of lithium chloride to the reaction solution resulted in a change of reaction selectivity.