Catalytic Intermolecular Pauson - Khand Reactions in Supercritical Ethylene.
Ethylene is not only a substrate, but also a solvent: Catalytic intermolecular Pauson - Khand reactions of terminal alkynes were carried out in supercritical ethylene to provide 2-substituted cyclopentenones in moderate to high yields [Eq. (1)]. Under these conditions, even a low pressure of CO (5 atm) is sufficient for the reaction to take place.
Jeong
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Hanhyo Institutes of Technology, 461-6 Chonmin-dong Yusong-ku, Taejon, 305-390 (Korea) and Department of Chemistry, Korea University 1-5ka Anamdong, Sungbukku, Seoul, 136-701 (Korea).
Hwang
SH