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2005
Cyclopentane derivatives
Q 0030
Tetramethyl Thiourea/Co2(CO)8-Catalyzed Pauson—Khand Reaction under
Pressure of CO. — The Co-tetramethylthiourea complex is shown for the
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first time to be an effective catalyst in the title reaction: diversified bicyclic enones are
synthesized in high yields. Just electron-deficient enynes give low yields of cyclization
products under the standard conditions. However, prolongation of the reaction time
could improve the yields. — (TANG, Y.; DENG, L.; ZHANG, Y.; DONG, G.; CHEN*,
J.; YANG, Z.; Org. Lett. 7 (2005) 4, 593-595; Key Lab. Bioorg. Chem. Mol. Eng.,
Minist. Educ., Coll. Chem., Peking Univ., Beijing 100871, Peop. Rep. China; Eng.)
— Steudel
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