Kyoung Mahn Kim

Unusual iodine catalyzed lactonization of γ-methyl-γ,δ-pentenoic acids: A facile synthesis of γ,γ-dimethyl-γ-butyrolactones

Abstract γ,γ-Dimethyl-γ-butyrolactones were exclusively obtained from γ-methyl-γ,δ-pentenoic acids with a catalytic amount of iodine in good yields in methylene chloride.

One-pot syntheses of 2,3-dihydro-2,2-dimethylbenzofuran derivatives

A tandem Claisen rearrangement-cyclization reaction of aryl methallyl ethers afforded the corresponding 2,3-dihydro-2,2-dimethylbenzofuran derivatives at −70 °C with aluminium chloride

Regioselectivity and Stereoselectivity in the Intramolecular Nitrile Oxide-Olefin Cycloaddition (INOC) Reaction and the Intramolecular Silyl Nitronate-Olefin Cycloaddition (ISOC) Reaction

Abstract Both INOC and ISOC reactions of 1 which has two different double bonds in a molecule (allylic and homoallylic double bond) showed high regioselectivity for allylic double bond to make [5,5] ring system. INOC reactions of 1 and 6 showed high diastereoselectivity for 4-substituents, whereas ISOC reaction did for 6-substituents of tetrahydrofuroisoxazolines.

Facile Syntheses of 2-Alkyl-2,3-dihydro-2-methylbenzofuran Derivatives

Abstract Various 2-alkyl-2,3-dihydro-2-methylbenzofurans 4 can be easily synthesized from 2-aryloxypropionic acid ethyl esters 1 by 3 steps in good yields.