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E-mail: yrlee@yu.ac.krReceived February 1, 2013, Accepted March 16, 2013Rhodium(II)-catalyzed reactions of cyclic diazo compounds derived from barbituric acid and thiobarbituricacid with a variety of styrene moieties were examined. These reactions provide rapid synthetic routes to thepreparations of spirobarbiturates and spirothiobarbiturates bearing cyclopropane rings. Key Words : Rhodium(II)-catalyzed reactions, Spirobarbiturates, Spirothiobarbiturates, Diazo compoundsIntroductionCyclopropanes are widely found as a basic unit in a rangeof naturally occurring compounds and medicinal agents.

bulletin of the korean chemical society

Efficient Synthesis of Spirobarbiturates and Spirothiobarbiturates Bearing Cyclopropane Rings by Rhodium(II)-Catalyzed Reactions of Cyclic Diazo Compounds