the first broad application of alkynyl sulfides as dienophiles in cobalt(i)-catalyzed diels—alder...

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2004 Thioethers Thioethers Q 0580 The First Broad Application of Alkynyl Sulfides as Dienophiles in Cobalt(I)-Cat- alyzed Diels—Alder Reactions. — CoBr 2 (dppe)/ZnI 2 /Zn is found to be an efficient catalyst for the Diels—Alder reaction of aryl alkynyl sulfides with acyclic 1,3-dienes. With alkynyl sulfoxides and sulfones the cycloadducts are obtained in low yields. The regioselectivity of the cycloaddition is controlled by steric effects. — (HILT*, G.; LUEERS, S.; HARMS, K.; J. Org. Chem. 69 (2004) 3, 624-630; Fachbereich Chem., Philipps-Univ., D-35043 Marburg, Germany; Eng.) — Jannicke 25- 100

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Page 1: The First Broad Application of Alkynyl Sulfides as Dienophiles in Cobalt(I)-Catalyzed Diels—Alder Reactions

2004 Thioethers

ThioethersQ 0580 The First Broad Application of Alkynyl Sulfides as Dienophiles in Cobalt(I)-Cat-

alyzed Diels—Alder Reactions. — CoBr2(dppe)/ZnI2/Zn is found to be an efficient catalyst for the Diels—Alder reaction of aryl alkynyl sulfides with acyclic 1,3-dienes. With alkynyl sulfoxides and sulfones the cycloadducts are obtained in low yields. The regioselectivity of the cycloaddition is controlled by steric effects. — (HILT*, G.; LUEERS, S.; HARMS, K.; J. Org. Chem. 69 (2004) 3, 624-630; Fachbereich Chem., Philipps-Univ., D-35043 Marburg, Germany; Eng.) — Jannicke

25- 100

Page 2: The First Broad Application of Alkynyl Sulfides as Dienophiles in Cobalt(I)-Catalyzed Diels—Alder Reactions

2004 Thioethers

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